| The Oshkosh-VisLab Joint Efforts on UGVs: Architecture, Integration, and Results |
MAY 2007 |
15 pages |
| Authors:
Alberto Broggi; Paolo Grisleri; Chris Yakes; Chris Hubert; PARMA UNIV (ITALY)
|
 | This paper presents the past and current activities on which Oshkosh Truck Corp. and University of Parma's VisLab are jointly involved in the field of Unmanned Ground Vehicles. Oshkosh Truck Corp. and VisLab share a common vision on the promise of autonomous technology in the future of ground vehicles. The paper describes the activities of each partner and shows some results of the cooperation, together with plans for the future ... |
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| Actuator Trade-Off Analysis for DARPA/BOSS Prototype II |
13 DEC 2006 |
13 pages |
| Authors:
Richard O. Stroman; NAVAL RESEARCH LAB WASHINGTON DC CHEMICAL DYNAMICS AND DIAGNOSTICS BRANCH
|
| The servomotor actuation method used in the first flight prototype zoom lens was chosen because it is simple, small, lightweight, easily available, and can be rapidly integrated into existing UAV systems. Unfortunately, it has proven to be unsatisfactory in several ways. Commanding the servo to positions outside of its displacement-force envelope results in the PID controller "hunting" for the commanded position and burning out the motor. The gearing system linking ... |
|
| Extended Kalman Filter Sensor Fusion Signals of Nonlinear Dynamic Systems |
DEC 2001 |
|
| Authors:
Rahim Jassemi-Zargani; D. S. Necsulescu; DEFENCE RESEARCH ESTABLISHMENT OTTAWA (ONTARIO)
|
 | World modeling for achieving operational space motion control of robot arms requires accurate measurements of positions and velocities in both joint and operational space. Servomotors used for joint actuation are normally equipped with position sensors and, optionally, with velocity sensors for interlink motion measurements. Further improvements in measurement accuracy can be obtained by equipping the robot arm with accelerometers for absolute acceleration measurement. In this report an Extended Kalman Filter ... |
|
| Bus Current Feedback for Motor Control |
JAN 2000 |
23 pages |
| Authors:
Hannon T. Maase; Jonathan A. Locker; Philip T. Krein; CONSTRUCTION ENGINEERING RESEARCH LAB (ARMY) CHAMPAIGN IL
|
| Many algorithms using nonlinear control ideas have been applied to the induction motor control problem to allow the user to control the torque, speed, or position response of a closed loop servo quite precisely. For many applications, the incremental improvement in transient torque, speed, or position response does not justify the additional computational requirements or a complicated tuning and commissioning process. A better solution would ... |
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| Remotely Controlled Flying Aided by a Head-Slaved Camera and HMD |
08 DEC 97 |
|
| Authors:
S. C. DE Vries; P. Padmos; HUMAN FACTORS RESEARCH INST TNO SOESTERBERG (NETHERLANDS)
|
| Military use of Unmanned Aerial Vehicles (UAVs) is gaining importance. Video cameras in these devices are often operated with joysticks and their image is displayed on a CRT. In this experiment, the simulated camera of a simulated UAV was slaved to the operator's head movements and displayed using a Helmet Mounted Display (HMD). The task involved manoeuvring a UAV along a winding course marked by trees. ... |
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| Force Feedback for Anthropomorphic Teleoperated Mechanisms |
JUN 95 |
145 pages |
| Authors:
James A. Chatfield Ii; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| The use of anthropomorphic teleoperated mechanisms has gained considerable attention as a means of performing tasks that require human-like control, but due to the nature of the environment, would be optimally accomplished without direct human contact in the particular workspace. These tasks include mine clearance, space operations, hazardous waste cleanup, and even surgery. In order to continue research into this method of remote, manual supervisory control, an anthropomorphic robot was ... |
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| Automatic Control of Robot Motion |
DEC 87 |
|
| Authors:
George P. Kalogiros; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| The feasibility of controlling the three link rectangular and revolute robots with an adaptive computer simulation model, using a curve following technique, is investigated. Both configurations are tested for different load conditions, for rejection of random disturbances and for robustness in the case of servo motor parameter variations. The interactive nonlinear dynamics of the revolute robot, such as coupling inertia, actuator dynamics, centripetal and coriolis forces, are also investigated. First ... |
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| Improvements to the Precision Pan and Tilt Head |
DEC 86 |
|
| Authors:
J. D. Roberts; E. C. Charlwood; P. N. Griffith; F. Mansfield; ROYAL SIGNALS AND RADAR ESTABLISHMENT MALVERN (ENGLAND)
|
| This Memorandum describes the drive and control improvements made to the heavy duty precision pan and tilt head previously reported in Memorandum 3691. The drive improvements have resulted in an increased maximum performance for the head to 4R/sq s in acceleration and to 0.85 R/s in velocity. The improvements to the control circuitry have allowed adaption to computer control and two approaches have been assessed which represent two levels of ... |
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| Particle Sizing from Forward Scattered Light at Two Angles Using a Variable-Focal-Length Optical System |
DEC 84 |
|
| Authors:
J. Powers; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| The theory of operation and description of a particle sizing device which indirectly determines the size of small particles from forward scattered light at two angles is presented. The device incorporates a fixed detector geometry and maintains a fixed intensity ratio at two photodiode detectors by adjusting the optical system focal length. Simple analogue signal processing is used with a servomotor to make continuous adjustments automatically. The optical device is ... |
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| Current Stabilized Underwater Platform. |
31 JUL 1984 |
|
| Authors:
L. T. Campbell; F. E. Gordon; H. Torkelson; DEPARTMENT OF THE NAVY WASHINGTON DC
|
| This patent discloses an apparatus for providing a stable platform for equipment to be employed in an underwater environment which includes a fin assembly for preventing uncontrolled azimuthal motion of the equipment when the fin assembly is suspended in the underwater environment to a level at which a current is present. The equipment is joined to a mounting which is rotatably positioned upon the fin assembly, and is oriented to ... |
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| Yoke Mover. |
24 JAN 1984 |
|
| Authors:
D. R. Hope; DEPARTMENT OF THE AIR FORCE WASHINGTON DC
|
| A servomechanical controller for inputting prerecorded flight data to an aircraft flight simulator is provided which comprises a pair of servomotors operatively interconnected to a single output shaft connected to the flight simulator control wheel, one motor controlling simulated pitch to the wheel by imparting axial movement to the shaft, and the other motor controlling simulated roll by imparting rotation to the shaft, transducer means for sensing both angular and ... |
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| Device for Adjusting the Gain Factor of Automatic Control Systems |
10 AUG 1982 |
|
| Authors:
B. V. Novoselov; A. V. Biryukov; V. M. Vinnichenko; FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OH
|
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| Servo System of Combined Control |
26 MAY 1982 |
|
| Authors:
B. V. Novoselov; Yu. S. Gorokhov; A. A. Kobzev; FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OH
|
|
| Control Strategies of an Inverted Pendulum |
SEP 1981 |
|
| Authors:
Richard Warren Harding; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| In a space booster on takeoff, a control system must be employed to prevent the rocket from falling over as it is forced upward by the engines. One accurate dynamic model of the space booster on takeoff is the inverted pendulum. This paper investigated the inverted pendulum system from development of equations of motion, through implementation of an actual inverted pendulum system using state variable feedback control. The concept of ... |
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| Mechanical Systems Development and Integration for a Second Generation Robot Submarine |
MAY 1980 |
|
| Authors:
James William White; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| The Dept. of Ocean Engineering at M.I.T. has been involved with the production of a robot submarine since the Summer of 1975. A first generation submarine was built, tested and was used for two years before a second generation design was begun. The second generation design was considerably more ambitious than the first, but the design was essentially finished by the Spring of 1979. Development work for the submarine and ... |
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| Mechanical Engineering Design of the DREO Optical Recorder for SEASAT. |
SEP 1979 |
|
| Authors:
D. J. Hidson; V. H. Pede; DEFENCE RESEARCH ESTABLISHMENT OTTAWA (ONTARIO)
|
| This paper contains a description of the mechanical engineering aspects of the DREO optical recorder for SEASAT. The concept, design and construction are discussed in detail. The device receives a signal from the satellite and converts it into an intensity modulated line on an oscilloscope. This line is focused by a lens system on to a moving film. The motion of the film allows an image to build up. The ... |
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| Miniature Target Tank. |
22 MAY 1979 |
|
| Authors:
Ignatious E. Adamski ; Clarence H. Winfree; DEPARTMENT OF THE ARMY WASHINGTON DC
|
| A miniature vehicle usable by the military for target training. The vehicle contains a radio receiver and propulsion-steering means responsive to radio output for causing the vehicle to execute evasive maneuvers. A technician equipped with a radio sending set at a remote location causes the miniature vehicle to execute unexpected evasive maneuvers, while soldiers undergoing training fire rifle rounds at the vehicle in a simulated battle field situation. (Author) |
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| Investigation and Assessment of Hardware for Guidance of Gliding Airdrop Systems. |
28 FEB 1979 |
285 pages |
| Authors:
Joseph R. Hennel; Lynn A. Gerig; Hugh R. Reeder; Jimmie R. Schiele; MAGNAVOX GOVERNMENT AND INDUSTRIAL ELECTRONICS CO FORT WAYNE IN
|
| Assessments were made of hardware and guidance techniques for Gliding Airdrop System employing partial and full-state guidance schemes. From the available candidate guidance schemes, the Army selected the following ones for further study to prepare system specifications and preliminary cost estimates: Minimum Cost Radial Homing, Radial Homing with Enhance Manual Control, Cone-of-Silence Homing, and Full-State Guidance. Airdrop systems with payload capacities of 227 KG, 909 KG, and 6800 KG are ... |
|
| Measurement of Solid Friction Parameters of Ball Bearings |
10 MAR 1977 |
25 pages |
| Authors:
Phil R. Dahl; AEROSPACE CORP EL SEGUNDO CA ENGINEERING SCIENCE OPERATIONS
|
| The near static friction behavior of ball bearings and other devices can be described by the author's mathematical model of solid friction. Three or more parameters used in the model need to be defined for a particular bearing that may be employed in a motor/load system design. At present, little or no data are available to define these parameters, and there is also little or no information on the subject ... |
|
| The Control of a Simple Inertia. |
DEC 1973 |
|
| Authors:
John Travis Williams; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OHIO SCHOOL OF ENGINEERING
|
| Three types of controllers were developed in this thesis for use with a position-control system which was characterized by a second-order differential equation. One type of controller was linear and continuous. Both examples of this type of controller were each optimal in the sense that they were designed to minimize a specific performance index. The other types were optimal nonlinear on/off controllers, and a linear on/off controller with an optimal ... |
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| Bipolar Servo Amplifier Commutation Circuit Using a Separate Silicon Controlled Rectifier and Isolated Power Supply for Changing a Commutation Capacitor. |
01 MAY 1973 |
|
| Authors:
Raymond H. Kaufman; DEPARTMENT OF THE ARMY WASHINGTON D C
|
| The patent describes a direct current powered commutation and damping system for a servo motor having both forward and reverse direction commutation circuits that use silicon controlled rectifiers for control. A logic circuit with a plurality of sequentially timed outputs is used for controlling the period of the duty and the damping cycles. The damping cycle is on for about 5 percent of the entire system repetition period, and is ... |
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| Motion Simulation Facility for the Satellite SYMPHONIE, |
1972 |
|
| Authors:
Konrad Reinel; DEUTSCHE FORSCHUNGS- UND VERSUCHSANSTALT FUER LUFT- UND RAUMFAHRT E V OBERPFAFFENHOFEN (WEST GERMANY)
|
| The manoeuvres of the application satellite SYMPHONIE are simulated by a motion simulator facility to increase confidence in the performance of the satellite attitude control system. Earth sensor, sun sensor, and attitude control electronics are used as hardware components in the simulation. The dynamics of the satellite is simulated by an analog computer. The dynamical motion simulation facility is considered as a new approach to a simulation technique with actual ... |
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| Product Improvement Test of Sheridan Weapon System, M551 (Traversing Mechanism Slip Clutch). |
MAY 1971 |
|
| Authors:
Donald F. Morris; ABERDEEN PROVING GROUND MD MATERIEL TESTING DIRECTORATE
|
| The engineering test of the traversing mechanism slip clutch was started at Aberdeen Proving Ground on 1 July 1970 and was terminated on 22 April 1971. The purpose of the test was to determine the ability of the traverse mechanism slip clutch to protect turret components during forced turret rotation, and its suitability for army use. Due to design problems in adaption of the slip clutch into the turret traverse ... |
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| Survey and Evaluation of Electrical Power Sources as to Their Potential Application with the 500-Pound Controlled Airdrop Cargo System. |
SEP 1970 |
|
| Authors:
John W. Dunlop; ARMY AVIATION MATERIEL LABS FORT EUSTIS VA
|
| The 500-pound CACS is an electronically guided, gliding cargo airdrop system that can deliver critical materials and supplies to troops in remote or hostile areas at any time of day or night under a wide range of weather and terrain conditions. Because the drop aircraft does not have to fly directly over the target area, the aircrew conducting the drop is assured greater safety because the delivery aircraft can remain ... |
|
| Servo Amplifier/Servomotor Compatibility Study, |
23 JUN 1969 |
92 pages |
| Authors:
Clifford E. Hogue; Leonard S. Skwiera; Jack W. Templeton; NAVAL AVIONICS FACILITY INDIANAPOLIS IN
|
| The report presents a study of the stability problem (tendency for unwanted oscillation) of a servo amplifier driving a servomotor. Servo amplifier stability is affected by the servomotor impedance being reflected back into the amplifier internal feedback loop. The servo amplifier/servomotor modeling techniques used for stability evaluation are considered. The study develops techniques for evaluating, testing, and specifying servo amplifier/servomotor combinations with respect to stability. Recommendations are made to modify ... |
|
| A SYSTEM FOR AUTOMATICALLY POSITIONING ASTRONOMICAL DOMES, |
JUN 1969 |
|
| Authors:
J. Maurer; MICHIGAN UNIV ANN ARBOR INST OF SCIENCE AND TECHNOLOGY
|
| This report describes a coordinate conversion computer system which is used to transform azimuth, polar, and declination angles of a three-axis telescope mount into equivalent azimuth and elevation angles. The system uses the resultant angle information to automatically position the astronomical dome associated with the telescope mount. Descriptions of the coordinate transformations which are required of the system and the system design considerations are presented. Calculations required for the selection ... |
|
| HYDRODYNAMIC TESTS OF HERCULES SEA UNIT XWO-2, |
04 JUN 1968 |
|
| Authors:
T. C. McGreen; NAVAL ORDNANCE LAB WHITE OAK MD
|
| The Lightweight Helicopter Remote Classification and Localization System (HERCULES) Sea Unit, XWO-2, was tested at the Naval Ship Research and Development Center circulating water channel. This latest design provides for paddles and hydrophone fairings and centroidal suspension. The hydrodynamic stability of the unit was considered satisfactory in water currents up to 2-1/2 knots. (Author) |
|
| AUTOMATIC RECOGNITION BACKGROUND EFFECTS STUDY. |
JAN 1968 |
|
| Authors:
John Gerdes; LITTON SYSTEMS INC VAN NUYS CA DATA SYSTEMS DIV
|
| This report discussed a brief study of several problems in photographic target recognition, and the modification of electro-optical data extraction equipment (the Automatic Target Recognition Device) to accomplish this study. Software and equipment modifications are discussed in detail and supplement a prior report (AD478454) on the subject. (Author) |
|
| PROVIDE PAYLOAD FOR AEROBEE ROCKET, REFURBISH AND TEST: A LUNAR POINTING CONTROL AND TELEMETRY SYSTEM. |
NOV 1967 |
|
| Authors:
Vernon L. Stone; Frank E. Wise; Martin Cunningham; COLORADO UNIV BOULDER LAB FOR ATMOSPHERIC AND SPACE PHYSICS
|
| This work covered the mathematical analysis of the servo electronic system used in both the solar and lunar Model III Biaxial Pointing Controls developed by the University of Colorado. The Laplace transform was used in the mathematical study. As of the date of this report, the study is incomplete due to the difficulties of evaluating certain physical constants. However, further work is being done and should prove the value of ... |
|
| DEVELOPMENT, FABRICATION, ASSEMBLY, AND TESTING OF BIAXIAL POINTING CONTROL AND ASSOCIATED TELEMETERING SYSTEMS. |
NOV 1967 |
|
| Authors:
Vernon L. Stone; Frank E. Wise; Martin Cunningham; COLORADO UNIV BOULDER LAB FOR ATMOSPHERIC AND SPACE PHYSICS
|
| The development of the solar biaxial and lunar biaxial pointing controls was begun in 1947. The contract being reported upon is the sixth in the series for the Air Force Cambridge Research Laboratories; these units are also being used by the Naval Research Laboratory and the National Aeronautics and Space Administration. This project involves the work being done on both lunar and solar biaxial pointing controls. (Author) |
|
| SERVO DAMPING OF A GRAVITY-GRADIENT STABILIZED SATELLITE. |
APR 1967 |
|
| Authors:
Gerard L. Commerford; James S. Whittier; AEROSPACE CORP EL SEGUNDO CA LABS DIV
|
| A system using gimballed optical sensors with servo controlled torques has been conceived as a possible mechanism for damping the librations of a gravity-gradient stabilized satellite. Analyses of the linearized equations of motion have established the servo gains required for stability, the type of motion to be expected, and the damping within all portions of the stable zones. A double compound pendulum has been constructed which qualitatively demonstrates the operation ... |
|
| SENSITIVITY ANALYSIS OF CERTAIN NONLINEAR CONTROL SYSTEMS, |
JAN 1967 |
|
| Authors:
Oray Balasaygun; ILLINOIS UNIV URBANA COORDINATED SCIENCE LAB
|
| It is well known that one of the main purposes of applying feedback is to reduce the system dependence or sensitivity to the usually undesirable parameter variations. A method of justifying the application of feedback would be to compare the perturbed responses with the nominal responses of the system with and without feedback control. In this thesis with the aid of the recent developments in the sensitivity theory by Bihovski, ... |
|
| EXPERIMENTAL MODIFIED SINOWRITER (CHICODER). |
NOV 1966 |
|
| Authors:
Albert Eng; ITEK CORP LEXINGTON MA
|
| The experimental Chicoder was improved to encode 32,000 possible symbols. As a Chinese input device, the Chicoder is presently capable of encoding any of 10,500 Chinese characters at a rate faster than dictionary look-up methods and make entries with a standard English typewriter. Character groupings by radicals, positioning of the radicals, stroke patterns and stroke pattern positions were classified and improved. The proof printer portion of the subsystem was proved ... |
|
| SYNTHESIS OF A FLUIDIC FLIGHT CONTROL SYSTEM. |
NOV 1966 |
|
| Authors:
Lael B. Taplin; Kenneth W. Verge; Walter F. Datwyler; BENDIX RESEARCH LABS SOUTHFIELD MI
|
| A program was conducted to investigate the feasibility of synthesizing a fully-pneumatic fluidic flight control system for advanced vehicle applications. A pitch axis flight stabilization system was developed to determined feasibility and to indicate achievable performance. The system approach selected for investigation utilizes a novel pulsating vortex rate sensor, jet digital signal processing elements, and orifice-volume analog frequency shaping network, and a complete integrated rotary position servo. The position servo ... |
|
| EXOSKELETON PROTOTYPE PROJECT. |
28 OCT 1966 |
|
| Authors:
Kendall E. Gilbert; GENERAL ELECTRIC CO SCHENECTADY NY RESEARCH AND DEVELOPMENT CENTER
|
| This is the final report of Phase I of a three-phase project to develop a powered exoskeleton. This is a powered, jointed, loadbearing structure designed to be worn by man and augment his strength and endurance. While wearing the device, an operator will be able to life up to 1500 pounds as high as 6 feet. He will also be able to carry such a load at least 25 feet ... |
|
| MILLIMETER AND SUBMILLIMETER DEVICE RESEARCH. |
OCT 1966 |
|
| Authors:
J. J. Gallagher; R. E. Cupp; R. A. Kempf; MARTIN CO ORLANDO FL
|
| Several physical changes in the electric resonance apparatus have been made in preparation for the frequency comparison tests. Work on the servo-control system and the recent molecular beam observations are discussed. A brief description of the work performed during the past year is given. The projected frequency comparison experiments and other pending experiments are treated. |
|
| THE BASES OF AUTOMATION AND TECHNICAL CYBERNETICS, |
23 SEP 1966 |
|
| Authors:
A. A. Krasovskii; G. S. Pospelov; FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO
|
| The book has three sectiins and contains a systematic account of the theory of elements of automatic devices, the theory of automatic control and the bases of technical cybernetics. A number of transmitters, amplifiers, controllers and regulating devices are discussed. The account of the theory of automatic adjustment includes the dynamics of linear, nonlinear and pulse systems of automatic control. The third section of the book - technical cybernetics - ... |
|
| TEST OF TWO CERAMIC-BONDED SOLID-FILM LUBRICANTS ON SMALL, HIGH-SPEED BALL BEARINGS RUN IN VACUUM AND IN AIR. |
SEP 1966 |
|
| Authors:
J. H. Lewis; M. R. Self; GENERAL DYNAMICS/FORT WORTH TEX NUCLEAR AEROSPACE RESEARCH FACILITY
|
| Two ceramic-bonded solid-film lubricants, MLF-5 and MLF-9, have been tested in air and in vacuum as the lubricant for size R3 ball bearings used in servomotors operating at 6000 rpm. A coastdown tester with ten servomotors that could be run simultaneously was used. The coastdown time was measured periodically, the field current in each phase of the two-phase servomotors was monitored, and the time to bearing failure was determined. In ... |
|
| A TORQUE MOTOR SERVOROTATOR FOR VESTIBULAR APPLICATION. |
SEP 1966 |
|
| Authors:
W. Carroll Hixson; Jorma I. Niven; NAVAL AEROSPACE MEDICAL INST PENSACOLA FLA
|
| The Periodic Angular Rotator is a novel servorotator designed for studies of the dynamic response of the oculovestibular system. It will rotate a single subject about an Earth-vertical axis in a wide variety of stimulus waveforms. Step function, ramp, and sinusoidal angular motions are generated precisely by a closed-loop power servomechanism drive system. The use of a low speed DC torque motor coupled directly to the payload resulted in a ... |
|
| AN IMPROVED FEEDBACK RADIOMETER. |
FEB 1966 |
|
| Authors:
William B. Goggins Jr.; AIR FORCE CAMBRIDGE RESEARCH LABS L G HANSCOM FIELD MASS
|
| Feedback applied to a radiometer will stabilize its gain. Two improved versions of an earlier feedback radiometer system have been built and tested. One used a mechanical attenuator, and the other an electronic attenuator. The following improvements were incorporated: faster responding and more accurate servo-driven noise source, a current-source driver for the ferrite switch, more versatile rf circuitry, improved coherent detector, and transistorized circuitry. The response of both servo loops ... |
|
| THE DESIGN OF ONE CLASS OF SERVO SYSTEMS CLOSE TO THE OPTIMAL. |
13 JAN 1966 |
|
| Authors:
A. A. Vavilov; Kotchenko; FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO
|
| In servo systems with a small zone of linearity it is possible, to realize operating conditions close to the optimum, during maximum signal at input of system and with limitation of voltage in the motor, by fulfilling certain relationships between parameters of the system. Results of an automatic compensator EPP-09 indicate that the necessary relationships between parameters in such system may be comparatively simply realized in practice. (Author) |
|
| A NEW APPROACH TO LUBRICATING BALL BEARINGS. |
28 DEC 1965 |
|
| Authors:
V. G. FitzSimmons; C. M. Murphy; J. B. Romansand ; C. R. Singleterry; NAVAL RESEARCH LAB WASHINGTON D C
|
| A study was undertaken of the causes of unsatisfactory service and storage life of Navy synchros and servo motors. Silicone oils have been in wide use as the lubricant for the ball bearings of these devices because of the good low-temperature characteristics of these materials. Examination of bearings from synchros which failed qualification tests gave evidence of fretting corrosion, broken bearing retainers, dry residues, and loss of lubricant. A white ... |
|
| AUTOMATIC SYSTEM FOR RECORDING THE AMPLITUDE AND PHASE CHARACTERISTICS OF DIAGRAMS OF ANTENNA DIRECTIONALITY, |
28 JUL 1965 |
|
| Authors:
I. N. Kuligin; I. K. Fadeev; FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO
|
| The object of the invention is an automatic device for recording the amplitude and phase characteristics of directionality diagrams of antennas designed in accordance with the system of different channels of measurable and reference signals. Simultaneous measurement of amplitudes and phases of the currents of UFH with high precision is assured by the use of slave motors and an attenuator connected with them of the limiting type with little initial ... |
|
| LIGHTWEIGHT NORTH SEEKING GYRO AZIMUTH SURVEYING INSTRUMENT MODEL NO. 11NG531A. |
01 JUN 1965 |
|
| Authors:
LEAR SIEGLER INC SANTA MONICA CA ASTRONICS DIV
|
| This report covers all the activities undertaken at the contractors lab. in the design, development, building, and testing of three Lightweight Gyro Azimuth Surveying Instruments. Operational requirements of the system call for the provision of a true north reference by gyroscopic means within an accuracy of 43 arc seconds at the equator and within a time limit of 20 minutes for each azimuth determination. This requirement applies over a wide ... |
|
| DESIGN AND DEVELOPMENT OF THE BALLOONBORNE SOLAR POINTER BBSP-200. |
20 APR 1965 |
|
| Authors:
Marvin E. Greeb; BALL BROTHERS RESEARCH CORP BOULDER COLO
|
| The report summarizes the results of the design, development, and test program of the balloon-borne biaxial solar pointing control, Series BBSP-200. The objective of this program was to develop a system capable of orienting a research instrumentation package toward the center of the solar disc while it is suspended from a high-altitude balloon for an unattended flight period of not less than 10 hours with an accuracy of better than ... |
|
| SELF-ADJUSTING SYSTEM OF AUTOMATICALLY CONTROLLING RELATIVE DAMPING COEFFICIENT, |
18 JAN 1965 |
|
| Authors:
V. M. Kuntsevich; FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO
|
| The self-adjusting system for automatically controlling relative damping coefficient contains the control object, amplifier-transformer, and test pulse generator and is characterized by the fact, that for the purpose of continuously measuring the current value of relative damping coefficient, the amplifier-multiplier is enveloped by direct connection, containing differentiating and integrating links, connected to the multiplier of derivative values and integral from mismatching signal. |
|
| STUDY OF ANTENNA AXIS CONFIGURATIONS FOR SATELLITE TRACKING AND CONTINUED STUDY OF TRANSPORTABLE ANTENNA SYSTEMS. VOLUME II. |
23 NOV 1964 |
|
| Authors:
M. Howe; B. Wilbur; W. Neubert; C. Wales; A. Clark; GENERAL ELECTRIC CO PITTSFIELD MASS
|
| Contents: Preliminary Designs; Thirty-Foot Antenna, Differential Axis; Manufacturing Considerations; Cable-Driven Differential Mount Power Drives, Gear Train Design Specifications, and Transportability and Erection, Thirty-Foot Antenna, X-Y Axis; Structural and Mechanical Design; X-Y Mount Power Drives; and Transportation; and Three-Axis Triax. |
|
| BASIC APPLIED RESEARCH IN FLUID POWER CONTROL. |
03 SEP 1964 |
|
| Authors:
H.H. RICHARDSON; H. A. Leibowitz; A. H. Levis; F. M. Mitchell; L. H. Mitchell; MASSACHUSETTS INST OF TECH CAMBRIDGE ENGINEERING PROJECTS LAB
|
| Technical results are presented and progress is described in several phases of continuing applied research and development related to the design and development of high-performance fluid control devices for advanced aerospace systems. Continued emphasis is placed on pneumatic components and systems which are capable of performing over wide ranges of temperature and in the presence of intense radiation. This report describes current work in the Engineering Projects Laboratory dealing with ... |
|
| STUDY OF ANTENNA AXIS CONFIGURATIONS FOR SATELLITE TRACKING AND CONTINUED STUDY OF TRANSPORTABLE ANTENNA SYSTEMS. |
10 JUL 1964 |
|
| Authors:
M. Howe; A. A. Clark; W. Neubert; C. W. Wales; W. Quick; GENERAL ELECTRIC CO PITTSFIELD MA
|
| The preliminary design of a 60-foot differential satellite tracking antenna is covered; advantages and disadvantages are discussed, supported by layouts, diagrams, servo block diagrams and other data. A feasibility study of the fullcoverage cable-driven antenna known as ball-joint mount is included. Covered are characteristics, sketches, pictures, servo analysis and other material which describe the advantages and problems of the ball-joint mount. Also included is treatment of power drive design, with ... |
|
| AN ANALYSIS OF A VARIABLE RATE SERVOMECHANISM FOR A RADIO DIRECTION FINDING SYSTEM. |
JUN 1964 |
|
| Authors:
Hollis Franklin Ryan; ILLINOIS UNIV URBANA ELECTRICAL ENGINEERING RESEARCH LAB
|
| A detailed analysis of an ac rate servomechanism is presented. The actual performance of the servo is compared to the desired performance. Two mathematical models of the servo are constructed from experimental data. The first model is the usual linear model using Laplace transforms; the second model is a quasi-linear model which includes a describing function representing the acceleration limiting of the servomotor. From the models the sensitivity and stability ... |
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Reports by Keyword(s)
SERVOMOTORS
