| Transients on a Lossless, Exponentially-Tapered Transmission Line. |
30 DEC 1976 |
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| Authors:
David Mathews; ARMY MISSILE RESEARCH DEVELOPMENT AND ENGINEERING LAB REDSTONE ARSENAL ALA GUIDANCE AND CONTROL DIRECTORATE
|
 | A solution for the problem of a voltage pulse propagating along a lossless, exponentially-tapered transmission line is presented in the form of a convolution integral. If the input pulse can be approximated in terms of simple functions, an analytical solution is possible. If not, numerical evaluation of the resulting integral is still much simpler than solving the differential equations of propagation. |
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| A Comprehensive Test Plan for the Evaluation of Television Contrast Automatic Trackers. |
20 DEC 1976 |
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| Authors:
Michael C. Pitruzzello; Mark D. Dixon; ARMY MISSILE RESEARCH DEVELOPMENT AND ENGINEERING LAB REDSTONE ARSENAL ALA GUIDANCE AND CONTROL DIRECTORATE
|
| Many types of television contrast automatic trackers are available today. However, there is no standard by which a user can compare trackers and thus choose the one best suited to the user's needs. This standardized test plan for television contrast automatic trackers will generate data to compare the performance characteristics of various trackers. |
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| Annotation and Control Subroutine Subprograms for Interactive Graphic Displays. |
05 NOV 1976 |
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| Authors:
Larmon S. Isom; ARMY MISSILE RESEARCH DEVELOPMENT AND ENGINEERING LAB REDSTONE ARSENAL ALA GUIDANCE AND CONTROL DIRECTORATE
|
| Recently, numerous digital computer simulation programs have been developed an/or modified to incorporate the usage of the interactive computer graphics terminal system into their resulting output. The interactive computer graphics terminal system is used primarily to obtain interactive graphic displays as a portion of the simulation program output results. These displays are ideal for data analysis, data reduction and retention, and for inclusion within presentations and technical reports. However, these ... |
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| Analysis of a Monopulse Radar. |
NOV 1976 |
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| Authors:
Franklin M. Waddle; ARMY MISSILE RESEARCH DEVELOPMENT AND ENGINEERING LAB REDSTONE ARSENAL ALA GUIDANCE AND CONTROL DIRECTORATE
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| A simplified monopulse radar is analyzed and expressions for the outputs of the error detectors are derived with the assumption of no interfering signals being present. Interfering signals are then added to the radar input. A brief look is also taken at a radar antenna control system. (Author) |
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| Analysis and Design of Digital Control Systems. Part II. Principles and Techniques. |
29 OCT 1976 |
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| Authors:
R. E. Yates; Y. T. Tsay; C. F. Chen; ARMY MISSILE RESEARCH DEVELOPMENT AND ENGINEERING LAB REDSTONE ARSENAL ALA GUIDANCE AND CONTROL DIRECTORATE
|
| In discrete-time feedback control system design, the use of nonrecursive compensators has advantages. However, the existing methods for designing such compensators are difficult. This report (1) lays the foundation necessary to understand window effects by investigating the basic properties of Gibbs' phenomena in both the time and the frequency domains, (2) analyzes the stability and performance aspects of discrete-time feedback systems via the Fast Fourier Transform (FFT) algorithm, and (3) ... |
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| Programs and Requirements Forecast for Army Missile Microelectronic Research, Development and Manufacturing Methods and Technology. |
20 OCT 1976 |
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| Authors:
David J. Irwin; Charles E. Riley; Victor W. Ruwe; Donald M. Vestal; ARMY MISSILE RESEARCH DEVELOPMENT AND ENGINEERING LAB REDSTONE ARSENAL ALA GUIDANCE AND CONTROL DIRECTORATE
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| The report contains a forecast of microelectronic technology which will be required for Army Missile during the next five years. The program and project required to achieve the required technology is defined in the work area of Research and Development or Manufacturing Technology. One section of this report is devoted to a discussion of the selection criteria used for the selection of the Manufacturing Technology program. |
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| Evaluation of the Effect of Target Motion on Target Detection Time Using a TV Sensor. |
28 SEP 1976 |
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| Authors:
Dorwin L. Kilbourn; William R. Phillips; ARMY MISSILE RESEARCH DEVELOPMENT AND ENGINEERING LAB REDSTONE ARSENAL ALA GUIDANCE AND CONTROL DIRECTORATE
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| The work discussed here was conducted in support of an internal research and development program conducted by the Missile Systems Division, Rockwell International, to determine the effect of target motion on target detection time using a TV sensor. Equally divided groups of fifty-one subjects viewed a TV displayed scenario of a stationary, a slow, or a moderately fast moving target of a tank type vehicle in a lightly cluttered rural ... |
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| Computer Controlled Target Locator/Designator System. |
22 JUL 1976 |
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| Authors:
Little J. Little; Michael C. Pitruzzello; Dan T. Reed; John R. Williams; ARMY MISSILE RESEARCH DEVELOPMENT AND ENGINEERING LAB REDSTONE ARSENAL ALA GUIDANCE AND CONTROL DIRECTORATE
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| This report presents the results of a technology program conducted at the Guidance and Control Directorate, US Army Missile Research, Development and Engineering Laboratory to demonstrate the feasibility of using a digital computer and navigation unit to control an optical sight/laser designator system. The system tested the capability to determine the coordinates of a target visible in the optical sight to cue the optical sight to coordinates furnished by the ... |
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| THAD T-7 Missile Monte-Carlo Terminal Homing Simulation Utilizing ALS, Digital/Linear and TV Seekers. |
01 JUL 1976 |
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| Authors:
Charles L. Lewis; William R. Hooker; Abner W. Lee Jr.; Jay Scott Harrison; ARMY MISSILE RESEARCH DEVELOPMENT AND ENGINEERING LAB REDSTONE ARSENAL ALA GUIDANCE AND CONTROL DIRECTORATE
|
| The all-digital, Monte Carlo six degree of freedom simulation program documented in this report provides a realistic method for the evaluation and analysis of a terminal homing weapons system. Included is a functional overview of the program, a detailed description of the individual modules and subroutines, a brief description (where appropriate) of the components modeled, and a guide to the use of the program. The missile modeled in the program ... |
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| Microprocessor Controller/Debug System. |
28 MAY 1976 |
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| Authors:
William F. Baxter; ARMY MISSILE RESEARCH DEVELOPMENT AND ENGINEERING LAB REDSTONE ARSENAL ALA GUIDANCE AND CONTROL DIRECTORATE
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| This report describes a system which provides a method for debugging the hardware and software of a microprocessor developed for use as a digital autopilot. (Author) |
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| Multipurpose Digital Microprocessor Emulator. |
11 MAY 1976 |
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| Authors:
Jerry R. Brookshire; ARMY MISSILE RESEARCH DEVELOPMENT AND ENGINEERING LAB REDSTONE ARSENAL ALA GUIDANCE AND CONTROL DIRECTORATE
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| This report describes an emulator designed and implemented to support the initial software development effort for a multipurpose digital microprocessor, and which also is to provide a vehicle for experimenting with hardware and software architectural changes proposed for the microprocessor. The initial testbed application for the microprocessor is to be the guidance control computer in the T-6 missile. The flight control software will be developed utilizing this emulator. (Author) |
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| Asymmetrical Oscillations in Nonlinear Systems. |
01 APR 1976 |
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| Authors:
R. E. Yates; Y. T. Tsay; C. F. Chen; ARMY MISSILE RESEARCH DEVELOPMENT AND ENGINEERING LAB REDSTONE ARSENAL ALA GUIDANCE AND CONTROL DIRECTORATE
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| A method to obtain the AC and DC describing functions of asymmetrical nonlinear systems is presented. The method is further extended allowing determination of the asymmetrical oscillations from a given transfer function and its nonlinear input. Examples are included illustrating the use of this method for various nonlinearities. (Author) |
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| SAM-D Trade-Off Study, Electromechanical Control Actuation System (EM/CAS). |
02 FEB 1976 |
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| Authors:
Joe L. Byrd; ARMY MISSILE RESEARCH DEVELOPMENT AND ENGINEERING LAB REDSTONE ARSENAL ALA GUIDANCE AND CONTROL DIRECTORATE
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| This report presents a discussion of the application of an electromechanical type actuator to the SAM-D missile. An actuator was not designed, but the preliminary design parameters and component sizes were estimated. The basic conclusion is that a conventional electromechanical actuator using magnetic particle clutches will not fit into the available volume on the SAM-D vehicle. (Author) |
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| User's Guide for a Terminal Homing Monte Carlo Simulation Utilizing a Digital/Linear Laser Seeker. |
02 FEB 1976 |
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| Authors:
Charles L. Lewis; Abner W. Lee Jr.; Jay Scott Harrison; ARMY MISSILE RESEARCH DEVELOPMENT AND ENGINEERING LAB REDSTONE ARSENAL ALA GUIDANCE AND CONTROL DIRECTORATE
|
| This report represents a user's guide for a digital/linear laser seeker model which has been added as an update to the existing US Army Missile Command Monte Carlo point target, terminal homing, all-digital simulation program. Random errors due to variations in reflected laser energy level and signal processing gain as well as errors due to target ambiguity are modeled. Input/output variables are defined, and a sample run set is included. ... |
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| Investigations of Describing Functions and Limit Cycles of Nonlinear Systems. |
19 JAN 1976 |
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| Authors:
R. E. Yates; C. F. Chen; Y. T. Tsay; ARMY MISSILE RESEARCH DEVELOPMENT AND ENGINEERING LAB REDSTONE ARSENAL ALA GUIDANCE AND CONTROL DIRECTORATE
|
| Methods for determining describing functions and limit cycles of single-valued nonlinear feedback systems are presented. A harmonic balance method is developed for finding the describing functions of multiplicative nonlinearities. The determination of limit cycles is accomplished by utilizing a newly-developed analytic method. This approach, which is completely computer oriented, imposed neither order limitations on the linear part nor restrictions on the number of possible stable limit cycles. Illustrative examples for ... |
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| Analysis and Experiment on an Electrical to Fluidic Interface with no Moving Parts. |
07 JAN 1976 |
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| Authors:
Paul L. Jacobs; J. C. Dunaway; ARMY MISSILE RESEARCH DEVELOPMENT AND ENGINEERING LAB REDSTONE ARSENAL ALA GUIDANCE AND CONTROL DIRECTORATE
|
| This report contains the results of experimental performance evaluation on an electrical to fluidic interface device with no moving parts. Scale factors, frequency response, null shift, power consumption, linearity, and signal-to-noise ratio were measured before and after a 10,000 'g' gun firing. It was concluded that the device has too low a frequency response for most control applications, and had an unacceptable null shift after the gun firing. The reason ... |
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| Simulation Models and Baseline Guidance and Control for Indirect-Fire Missiles with Strapdown-Inertial Guidance. |
JAN 1976 |
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| Authors:
Walter E. Jordan; ARMY MISSILE RESEARCH DEVELOPMENT AND ENGINEERING LAB REDSTONE ARSENAL ALA GUIDANCE AND CONTROL DIRECTORATE
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| The simulation models and baseline guidance and control described in this report were developed to define performance requirements for the airframe, propulsion, guidance, autopilot, and control systems for strapdown-inertially guided indirect-fire missiles. A type of proportional navigation guidance using missile to target relative velocity and position is derived and has the property of being able to shape the missile trajectory for range extension and instrument error minimization. Typical inputs for ... |
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| Digital Navigator Analyzer Programming. |
23 DEC 1975 |
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| Authors:
Joseph S. Ingegneri; ARMY MISSILE RESEARCH DEVELOPMENT AND ENGINEERING LAB REDSTONE ARSENAL ALA GUIDANCE AND CONTROL DIRECTORATE
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| The Digital Navigator Analyzer in conjunction with the Hewlett Packard 2100 computer will determine the accuracy of the land navigator as it travels over a surveyed course. This technical report presents a discussion on the software portion of this effort. |
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| Computer Simulation of Control System Containing Digital Hardware. |
DEC 1975 |
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| Authors:
S. M. Seltzer; ARMY MISSILE RESEARCH DEVELOPMENT AND ENGINEERING LAB REDSTONE ARSENAL ALA GUIDANCE AND CONTROL DIRECTORATE
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| This report describes an approach that may be used to develop a simulation which employs some digital hardware in the guidance and control loop. The approach is applied to portions of the T-6 digital autopilot data processor. (Author) |
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| Analysis and Design of a Terminal Homing System Digital Autopilot. |
11 NOV 1975 |
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| Authors:
R. E. Yates; J. A. Templeton; J. T. Bosley; K. D. Dannenberg; S. L. O'Hanian; ARMY MISSILE RESEARCH DEVELOPMENT AND ENGINEERING LAB REDSTONE ARSENAL ALA GUIDANCE AND CONTROL DIRECTORATE
|
| This report documents the design and performance analysis of a digital autopilot for the therminal Homing Accuracy Demonstration (THAD) program. This autopilot utilizes a digital processor for guidance and stabilization of the T6 missile with the Army Laser Seeker. Under the study guidelines, the autopilot configuration is essentially unchanged, using the laser seeker to generate pitch/yaw proportional navigation signals and two-degrees-of-freedom attitude gyros for pitch/yaw/roll stabilization. The digital autopilot performance ... |
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| Utilization of Common Subroutine and Function Subprograms in Missile System Simulations. |
06 NOV 1975 |
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| Authors:
Larmon Isom; Larry Hazel; ARMY MISSILE RESEARCH DEVELOPMENT AND ENGINEERING LAB REDSTONE ARSENAL ALA GUIDANCE AND CONTROL DIRECTORATE
|
| The requirements for the integration of differential equations and function generation are common to all weapon (missile) system flight path (trajectory) simulation programs. Subroutine subprograms and function subprograms to perform these requirements have been provided as routines on a user library for the Xerox Sigma 5 Analog Coupler Driver Simulation Facility. A detailed description and the call statements for these user library subprogram subroutines are contained within this report. Examples ... |
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| More on IMU Self-Alighment Techniques. |
30 Sep 1975 |
|
| Authors:
J C Hung; H V White; ARMY MISSILE RESEARCH DEVELOPMENT AND ENGINEERING LAB REDSTONE ARSENAL ALA GUIDANCE AND CONTROL DIRECTORATE
|
| This report documents the results of a continued study on platform self-alignment techniques conducted at the Guidance and Control Directorate, US Army Missile Research, Development and Engineering Laboratory, Redstone Arsenal, Alabama. The study was aimed at exploring the latest techniques in platform self-alignment and at developing new approaches which would enhance the successful application of self-alignment principles to the PERSHING platform alignment problem with its unique accuracy and reaction time ... |
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| Thermal Analysis of the RFSS Switch Driver. |
18 Sep 1975 |
|
| Authors:
Vernon A Nieberlein; ARMY MISSILE RESEARCH DEVELOPMENT AND ENGINEERING LAB REDSTONE ARSENAL ALA GUIDANCE AND CONTROL DIRECTORATE
|
| Overheated microelectronic circuits caused some equipment failures in a device known as the RFSS switch driver. A thermal analysis was made of this equipment using the CINDA computer code, and the mathematical model was validated by thermocouple readings. The effect of package material and the effect of convective cooling fins were calculated and the results are presented in graphic form. Recommendations are made for improving the dissipation of heat. |
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| AH-1 Helicopter Vibration Levels for Stub Wing Mounted Equipment. |
SEP 1975 |
|
| Authors:
Gordon D. Welford; Joseph S. Boland III; ARMY MISSILE RESEARCH DEVELOPMENT AND ENGINEERING LAB REDSTONE ARSENAL ALA GUIDANCE AND CONTROL DIRECTORATE
|
| This report presents measured translational and angular acceleration inputs to stub wing mounted equipment on the AH-1 helicopter. In this case the wing mounted electro-optical systems were the stabilized platform airborne laser system and the stabilized mirror airborne laser system. The data are presented in the form of power spectral density, amplitude versus frequency, and oscillograph charts. |
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| Thermal Analysis Considerations of Hybrid Microelectronic Circuits. |
SEP 1975 |
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| Authors:
Victor W. Ruwe; Tim D. Slagh; ARMY MISSILE RESEARCH DEVELOPMENT AND ENGINEERING LAB REDSTONE ARSENAL ALA GUIDANCE AND CONTROL DIRECTORATE
|
| This report presents the results of an analytical study of heat flow in hybrid microelectronic circuits and packages. The study is divided in two parts. First, heat removal from the package by convection and radiation is considered. Second, conduction of heat from an active chip area to a heat-sinked package header is modeled by use of finite-difference methods. Typical examples are worked to illustrate the analytical approach, and computer results ... |
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| An Electronic Target Generator to Test Television Contrast Automatic Trackers. |
14 AUG 1975 |
|
| Authors:
Michael C. Pitruzzello; Mark D. Dixon; Leonard M. Moore; ARMY MISSILE RESEARCH DEVELOPMENT AND ENGINEERING LAB REDSTONE ARSENAL ALA GUIDANCE AND CONTROL DIRECTORATE
|
| The US Army Missile Development Center's efforts in the area of precision pointing and tracking has shown the importance of automatic trackers for precision pointing of armament. One of the most widely used types of automatic trackers is the television contrast automatic tracker. However, many different approaches exist to this one type of tracking, each with distinct advantages and disadvantages. This fact along with the difficulty of testing one tracker ... |
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| Evaluation of the Garrett/AirResearch Electrofluidic Transducer. |
AUG 1975 |
|
| Authors:
James G. Williams; ARMY MISSILE RESEARCH DEVELOPMENT AND ENGINEERING LAB REDSTONE ARSENAL ALA GUIDANCE AND CONTROL DIRECTORATE
|
| Two electrofluidic interfaces, manufactured by Garrett Corporation-AiResearch, were statically and dynamically evaluated to determine their characteristics. One interface unit was modified by adding Ferrofluid to increase dampening. The data, conclusions, and recommendations were presented for both interface units. (Author) |
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| Relationships between the Dielectric Constant, Refractive Index and Hysteresis in Crystal Structures. |
18 JUL 1975 |
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| Authors:
J. E. Brown; ARMY MISSILE RESEARCH DEVELOPMENT AND ENGINEERING LAB REDSTONE ARSENAL ALA GUIDANCE AND CONTROL DIRECTORATE
|
| This report describes the relationships of the dielectric constant and refractive index in crystal structures. It is an attempt, using existing literature, to investigate through conventional means, possible measurement and use of the speed of light in crystal structures. The attempt is made to establish the possibility of measuring crystal characteristics by applying an electric field and measuring the effect on light transmission. This appears possible because of the ... |
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| Statistical Analysis of Cannon Launched Guided Missile Projectile Hardware-in-the-Loop Simulations. Volume I. |
02 JUL 1975 |
|
| Authors:
Larmon S. Isom; Harold L. Pastrick; ARMY MISSILE RESEARCH DEVELOPMENT AND ENGINEERING LAB REDSTONE ARSENAL ALA GUIDANCE AND CONTROL DIRECTORATE
|
| This report presents a complete documentation of the statistical analysis performed on the hardware-in-the-loop simulations of the cannon launched guided projectile. Section 1 of this report contains an introduction and the background information pertaining to the Cannon Launched Guided Projectile hardware-in-the-loop simulations. Section 2 contains the necessary information for the arithmetic mean and standard deviation computation of the errors and/or results obtained from a series of tests, experiments, observations, etc. ... |
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| Computational Program for Thermal Analysis of Fluid Control Systems. |
25 JUN 1975 |
|
| Authors:
Paul L. Jacobs; ARMY MISSILE RESEARCH DEVELOPMENT AND ENGINEERING LAB REDSTONE ARSENAL ALA GUIDANCE AND CONTROL DIRECTORATE
|
| This report describes an analysis and computer program for calculating heat transfer in a series of tube and orifice combinations in fluid control. systems. Use of this program will enable an engineer to quickly determine proper tube sizing, necessary insulation, heat transfer in stagnation regions, etc., and gas temperatures at various points for typical gases used in control systems. The program is sufficiently general to allow lumped modeling of fittings, ... |
|
| Concepts Study for Nanosecond Risetime Multi-megajoule Impulse Power Systems. |
12 JUN 1975 |
12 pages |
| Authors:
Darryl Holder; ARMY MISSILE RESEARCH DEVELOPMENT AND ENGINEERING LAB REDSTONE ARSENAL ALA GUIDANCE AND CONTROL DIRECTORATE
|
 | This report considers the concepts, techniques, and limitations of means for controlling the flow of extremely high electric currents and the production of very rapid rates of change of current through a load. Impulse power systems are being incorporated in an increasing number of applications in military and research apparatus. As power and current risetime requirements are increased, more difficulties are encountered by the designer in producing an effective system. ... |
|
| An Interactive Computer Graphics Terminal System Introduction/Application. |
02 JUN 1975 |
|
| Authors:
Larmon S. Isom; ARMY MISSILE RESEARCH DEVELOPMENT AND ENGINEERING LAB REDSTONE ARSENAL ALA GUIDANCE AND CONTROL DIRECTORATE
|
| An interactive computer graphics terminal system generally consists of both hardware and software, the software being used to drive and control the functioning of the hardware. The software is composed of a user's application program and a library of program routines. The hardware, an application program, and the library of program routines for a particular interactive computer graphics terminal system configuration are described in this report. |
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| Digital Autopilot Sample Rate Selection Based on Control System Requirements. |
01 MAY 1975 |
|
| Authors:
Edward E. Herbert; ARMY MISSILE RESEARCH DEVELOPMENT AND ENGINEERING LAB REDSTONE ARSENAL ALA GUIDANCE AND CONTROL DIRECTORATE
|
| The purpose of this paper is to discuss some considerations in the selection of a sample rate for the digital autopilot. The missile autopilot design which incorporates a digital computer or microprocessor(s) to implement the stability compensation equations requires considerations over and above those made for analog computer autopilots. Some of these considerations are: the selection of sampling frequency, the A/D converter wordlength, the phase lag contributed by the zero ... |
|
| Fluidic Gyro Torquer. |
22 APR 1975 |
|
| Authors:
Aubrey Rodgers; Rayburn K. Widner; ARMY MISSILE RESEARCH DEVELOPMENT AND ENGINEERING LAB REDSTONE ARSENAL ALA GUIDANCE AND CONTROL DIRECTORATE
|
| The objective of this program is to develop fluidic torquer technology for missile guidance and control seeker type gyros. This report presents the technology in the development of a proportional/digital fluidic torquer and the associated electrofluid converter. The conceptual design feasibility and hardware performance characteristics are confirmed by the evaluation material. The cost-effectiveness of the torquer design is established by the use of off-the-shelf items and design simplicity. High-g survival ... |
|
| DCAT Experimental Evaluations and System Development. |
17 MAR 1975 |
|
| Authors:
Victor W. Ruwe; ARMY MISSILE RESEARCH DEVELOPMENT AND ENGINEERING LAB REDSTONE ARSENAL ALA GUIDANCE AND CONTROL DIRECTORATE
|
| A program was conducted to demonstrate the feasibility and applicability of directional control guidance on a small direct fire system. The system performance specification was established to take full advantage of the characteristics of this guidance scheme. The first characteristic was a high velocity/constant acceleration airframe with a controllable range of 750 meters. The missile was fin stabilized and reaction jet controlled, and the flight profile consists of eject-coast-boost phases. ... |
|
| T-6 Digital Autopilot Data Processing Analysis and Specification. |
05 MAR 1975 |
65 pages |
| Authors:
C. Frank Asquity; ARMY MISSILE RESEARCH DEVELOPMENT AND ENGINEERING LAB REDSTONE ARSENAL ALA GUIDANCE AND CONTROL DIRECTORATE
|
| This report describes the analysis required to specify the computer data processing for a digital autopilot for a small homing missile. The problem of conversion of an analog system to a digital system by state variable methods is examined. Modification of the resulting digital system to maintain system gain and phase margins is accomplished. Data rate and word length effects are studied and the decomposed state variable type formulation is ... |
|
| Glossary of Optical and Instrument Terms. |
02 JAN 1975 |
|
| Authors:
J. E. Neumann; ARMY MISSILE RESEARCH DEVELOPMENT AND ENGINEERING LAB REDSTONE ARSENAL ALA GUIDANCE AND CONTROL DIRECTORATE
|
| This glossary submits terms and definitions peculiar to a system of optics and instruments having applications in guidance, control, and stabilization systems. This report also serves as a ready reference for engineers and technicians requiring such terminology for reporting purposes. |
|
| Dielectric Breakdown in Solids. |
20 DEC 1974 |
54 pages |
| Authors:
Paul P. Budenstein; ARMY MISSILE RESEARCH DEVELOPMENT AND ENGINEERING LAB REDSTONE ARSENAL ALA GUIDANCE AND CONTROL DIRECTORATE
|
| Experimental and theoretical descriptions of dielectric breakdown phenomena in solids are reviewed. No existing theory seems to adequately explain the range of observed effects. A 'new' model of dielectric breakdown is proposed that combines existing mechanisms in a distinctive fashion. The model considers the breakdown process to contain five stages: creation of a critical charge density, bond disruption, chemical chain reaction, growth of a gaseous cavity and crack formation, completion ... |
|
| The Design and Development of a Double Gap Loop B Dot Sensor. |
01 DEC 1974 |
|
| Authors:
Wayne T. Hudson; George R. Edlin; ARMY MISSILE RESEARCH DEVELOPMENT AND ENGINEERING LAB REDSTONE ARSENAL ALA GUIDANCE AND CONTROL DIRECTORATE
|
| This report describes the design and development of a double gap loop B dot sensor in response to a need for a short rise time sensor for pulse radiation field measurements for antenna scale modeling. A sensor with a single-ended or unbalanced output was needed because this was a requirement of the laboratory instrumentation for monitoring fast rise time pulses (on the order of 0.5 nanosecond). |
|
| Digital Computer Program for the Determination of Modified Z-Transforms with W-Plane Transformation. |
01 Dec 1974 |
|
| Authors:
Edward E Herbert; Bettye Rogerson; ARMY MISSILE RESEARCH DEVELOPMENT AND ENGINEERING LAB REDSTONE ARSENAL ALA GUIDANCE AND CONTROL DIRECTORATE
|
| In the analysis of sampled-data control systems containing transport lags due to computational delay of the controller and/or the actuator mechanism, the modified z-transforms are frequently used. This computer program breaks down the LaPlace transform transfer function of the system into a sum of partial fractions and computes the modified z-transform of each term. Each term is then mapped into the W-plane by the bilinear transformation z = (1 + ... |
|
| PERSHING Hydropak Model. |
31 OCT 1974 |
|
| Authors:
Gordon D. Welford; William H. Boykin; William W. Malcolm; ARMY MISSILE RESEARCH DEVELOPMENT AND ENGINEERING LAB REDSTONE ARSENAL ALA GUIDANCE AND CONTROL DIRECTORATE
|
| This report presents the detailed math model of the PERSHING Unitized Hydraulic Actuator System or Hydropak. The governing equations are derived, a simplified analog simulation is used to check the model, and a detailed digital simulation model is presented as well as response data from seven depot stock hydropaks. Sensitivity and parameter identification techniques are utilized to match the model to the actual hydropak response data. |
|
| Lance Model 4841 Accelerometer Drift Phenomena. |
OCT 1974 |
|
| Authors:
Joe S. Hunter; ARMY MISSILE RESEARCH DEVELOPMENT AND ENGINEERING LAB REDSTONE ARSENAL ALA GUIDANCE AND CONTROL DIRECTORATE
|
| This report traces the steps and discusses the rationale associated with the LANCE 4841 accelerometer drift problem from its initial discovery through the investigation phase, fix, and subsequent requalification program. Initial drift rates as high as 1 millivolt per minute were experienced. Various experiments were conducted in an effort to identify the drift problem. Once the problem was identified, a fix was arrived at which allowed field units to be ... |
|
| Derivation and Analysis of the Complete Nonlinear Dynamical Equations of the MICOM Stabilized Mirror System. |
09 Sep 1974 |
67 pages |
| Authors:
William H Boykin; James L Baumann; ARMY MISSILE RESEARCH DEVELOPMENT AND ENGINEERING LAB REDSTONE ARSENAL ALA GUIDANCE AND CONTROL DIRECTORATE
|
| The complete nonlinear dynamical equations of the MICOM stabilized mirror system mounted on a vehicle are derived and analyzed for certain stabilized motion. Lagrange's formulation of D'Alembert's principle is used to derive the highly coupled equations of motion of the gimballed platform, balancer, mirror, and azimuth and elevation gyroscopes. Four special cases of the full dynamical equations are presented. They are the equations based on the assumptions of (a) small ... |
|
| Terminal Homing Engineering Flight Test T7 and MT7 Missile Launch Transients Data Reduction and Summary. |
29 AUG 1974 |
34 pages |
| Authors:
J. Knoblach; ARMY MISSILE RESEARCH DEVELOPMENT AND ENGINEERING LAB REDSTONE ARSENAL ALA GUIDANCE AND CONTROL DIRECTORATE
|
| The launch transients at tipoff for forty-six T7 and MT7 missile launches are compiled, grouped according to Quadrant Elevation Angle, and the mean tipoff transients and standard deviations thereof are calculated. Results are discussed generally in terms of launch rail rigidity, wind velocity components, and rail/shoe dynamics. |
|
| Excitons. |
30 APR 1974 |
|
| Authors:
J. E. Brown; ARMY MISSILE RESEARCH DEVELOPMENT AND ENGINEERING LAB REDSTONE ARSENAL ALA GUIDANCE AND CONTROL DIRECTORATE
|
| From literature searches it can be determined that considerable research is being done in a number of countries, on both theory and experiment relative to excition phenomena. At least one author points this out with the fact that a large number of disciplines are interested in the subject. Two important areas are photosynthesis and animal vision, each being of interest to the photochemist and biologist, respectively. The excition is defined ... |
|
Reports by Corporate Author
