| System Identification for Robust Control Design |
09 FEB 96 |
111 pages |
| Authors:
Robert L. Kosut; INTEGRATED SYSTEMS INC SANTA CLARA CA
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 | The long-range goal of this research program is to form a new system identification paradigm that fulfills all the requirements of robust control design, i.e., to produce from finite measured data a model which includes descriptors for both dynamic and disturbance uncertainty. Several directions were pursued during the reporting period: (1) least-squares related approaches (2) 'windsurfer' (learning) adaptation, and (3) uncertainty model unfalsification. The latter, together with some of the ... |
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| Adaptive Control of Nonlinear Flexible Systems |
26 MAY 94 |
53 pages |
| Authors:
Robert L. Kosut; M. G. Kabuli; INTEGRATED SYSTEMS INC SANTA CLARA CA
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| The objective is the development of adaptive control methods which can significantly improve closed-loop performance for a broad class of nonlinear flexible systems. Towards this end, a nonlinear controller, applicable to a broad class of nonlinear systems, was devised. The controller consists of a feedforward signal generator which incorporates a model estimate together with a global feedback linearizer. There is an inner feedback controller which modifies control action in accordance ... |
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| Adaptive Control of Nonlinear Flexible Systems |
26 MAY 94 |
52 pages |
| Authors:
Robert L. Kosut; M. G. Kabuli; INTEGRATED SYSTEMS INC SANTA CLARA CA
|
| The objective is the development of adaptive control methods which can significantly improve closed-loop performance for a broad class of nonlinear flexible systems. Towards this end, a nonlinear controller, applicable to a broad class of nonlinear systems, was devised. The controller consists of a feedforward signal generator which incorporates a model estimate together with a global feedback linearizer. There is an inner feedback controller which modifies control action in accordance ... |
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| Intelligent Control of Chemical Vapor Disposition Processes |
01 SEP 93 |
87 pages |
| Authors:
Sunil Shah; INTEGRATED SYSTEMS INC SANTA CLARA CA
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| Significant progress has been made in improving process control on the Technion TB reactor by using a model-based approach to control design. This approach has led to improvements in two areas. First, it has made the control design process more efficient by reducing the time required by a trial and error approach. This will lead to a cost saving in manpower. Second, it has led to design of effective controllers ... |
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| Set-Membership Identification for Robust Control Design |
28 APR 93 |
103 pages |
| Authors:
Robert L. Kosut; INTEGRATED SYSTEMS INC SANTA CLARA CA
|
| This report describes accomplishments in developing methods of system identification for robust control design. The starting point is an a priori plant description containing both parametric and nonparametric uncertainty. The identification methods are developed under differing a priori assumptions on the parametric and nonparametric parts of the model set. For example, when a bound on the nonparametric part is known, it is shown that the parameters in the parametric part ... |
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| Adaptive Control of Nonlinear Flexible Systems |
18 JAN 93 |
55 pages |
| Authors:
Robert L. Kosut; M. G. Kabuli; INTEGRATED SYSTEMS INC SANTA CLARA CA
|
| The objective is the development of adaptive control methods which can significantly improve closed-loop performance for a broad class of nonlinear flexible systems. Towards this end, a nonlinear controller, applicable to a broad class of nonlinear systems, was devised. The controller consists of a feedforward signal generator which incorporates a model estimate together with a global feedback linearizer. There is an inner feedback controller which modifies control action in accordance ... |
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| Adaptive and Nonlinear Control for Rapid Maneuvering of Flexible Structures |
01 OCT 91 |
90 pages |
| Authors:
Robert L. Kosut; Guntekin M. Kabuli; INTEGRATED SYSTEMS INC SANTA CLARA CA
|
| This report describes research results on the design of feedback controllers for rapid slewing of flexible space structures, such as optical tracking systems. Two approaches evolved during this research. The first approach modifies the exact rigid-body time-optimal control so as to account for chattering near zero tracking error and robustness to flexible modes close to the controller bandwidth. Efforts to make this controller adaptive are also presented. The second approach ... |
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| Adaptive Control of Large Space Structures |
15 AUG 90 |
39 pages |
| Authors:
Robert L. Kosut; INTEGRATED SYSTEMS INC SANTA CLARA CA
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| Preliminary results are presented for set estimation of uncertain nonlinear systems. Set estimation is a process in an adaptive robust control system which produces a set of models from the measured data. The set is then used in an on-line robust control design to implement a controller which is guaranteed to achieve performance goals for all members on the set. The scheme works whenever the actual system which produced the ... |
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| System Identification Tools for Control Structure Interaction |
JAN 90 |
92 pages |
| Authors:
Robert L. Kosut; Guntekin M. Kabuli; INTEGRATED SYSTEMS INC SANTA CLARA CA
|
| To meet the stringent closed-loop performance specifications of flexible space structures will require very accurate dynamical models for control design. Ground-testing is not likely to produce the on-orbit dynamics to within the requisite accuracy. This report examines the feasibility of on-orbit identification for robust control design. A simulation model of the ASTREX facility is used as a testbed. It is demonstrated that robust control design can be used to dictate ... |
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| Adaptive Control Techniques for Large Space Structures |
23 DEC 87 |
94 pages |
| Authors:
Robert L. Kosut; INTEGRATED SYSTEMS INC SANTA CLARA CA
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| This report summarizes the research performed on adaptive control techniques for Large Space Structures (LSS). The research effort concentrated on two areas: (1) on-line robust design from identified models - what is referred to here as adaptive calibration; and (2) an analysis of slow-adaptation for adaptive control of LSS. The report summarizes the results obtained in theses areas and also includes Appendices which contain technical articles: (1) Adaptive Control of ... |
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| computer-Aided-Control Engineering (CACE) PRimitives for Robust and Adaptive control Systems |
12 OCT 87 |
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| Authors:
Robert L. Kosut; M. Vidyasagar; INTEGRATED SYSTEMS INC SANTA CLARA CA
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 | The objective of the past research was the development of some mathematical and computational tools that are appropriate to the next generation of CACE (Computer-Aided-Control-Engineering) environments. These CACE packages will be radically different than the present analysis packages in that they will truly be able to perform control system synthesis. In order for this ideal situation to come about, it is necessary first to solve some important problems in the ... |
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