1. |
Passivity and the design of sampled regulators: extended results |
|
International Journal of Control,
Volume 51,
Issue 3,
1990,
Page 503-519
Z. XU,
R. G. CAMERON,
F. LI,
Preview
|
PDF (399KB)
|
|
摘要:
Mossahebet al.(1987) have presented a method for the design of a robust sampled regulator for uncertain systems which ensures the passivity of the controlled system and thereby also ensures its stability. The use of the passivity argument also enables stability to be guaranteed in the face of perturbations to the parameters of the system and/or the controller. The strength of the method lies in the fact that a step response model of the process to be controlled is used, so that design can be carried out based on straightforward experimental procedures. The present work offers several significant enhancements to the results described by Mossahebet al.(1987) which extend the class of systems to which the method can be applied, increase the flexibility of the design process and provide an alternative means of implementing the control law which will usually be more efficient than the original method.
ISSN:0020-7179
DOI:10.1080/00207179008934081
出版商:Taylor & Francis Group
年代:1990
数据来源: Taylor
|
2. |
Generalized robustness of optimally of linear quadratic regulators |
|
International Journal of Control,
Volume 51,
Issue 3,
1990,
Page 521-533
KENJI SUGIMOTO,
YUTAKA YAMAMOTO,
Preview
|
PDF (365KB)
|
|
摘要:
Robustness of the optimality of linear quadratic (LQ) optimal regulators is studied. It is shown that under a mild assumption, optimality of LQ regulators is preserved under small perturbations on bothFandGmatrices. This is made possible by allowing modifications on both weighting parametersQandR, and it also extends the existing results where perturbations onFonly are allowed. It is also observed that this modification leads to a possible change in gain margin. A numerical example is discussed in detail to illustrate the results.
ISSN:0020-7179
DOI:10.1080/00207179008934082
出版商:Taylor & Francis Group
年代:1990
数据来源: Taylor
|
3. |
Parametrization of state feedbackH∞controllers |
|
International Journal of Control,
Volume 51,
Issue 3,
1990,
Page 535-551
KANG-ZHI LIU,
TSUTOMU MITA,
RYOJI KAWATANI,
Preview
|
PDF (404KB)
|
|
摘要:
The state feedbackH∞control problem is considered in this paper. It is shown that under mild conditions this problem can be solved simply by using the conjugation approach proposed by Kimura and Kawatani with some extended treatment to the case thatT3(s)is tall and strictly proper. A partial parametrization of state feedback controllers achieving the prescribed norm bound is obtained. This is an eminent difference from previous work on the state feedbackH∞control problem where only a static feedback control law (the central solution of our result) is provided. Both four block and one block problems are solved in this paper. The results of this paper embrace those of Doyleet al.and Petersen.
ISSN:0020-7179
DOI:10.1080/00207179008934083
出版商:Taylor & Francis Group
年代:1990
数据来源: Taylor
|
4. |
Observer-based control law for a class of non-linear systems |
|
International Journal of Control,
Volume 51,
Issue 3,
1990,
Page 553-566
S. NICOSIA,
P. TOMEI,
A. TORNAMBÈ,
Preview
|
PDF (325KB)
|
|
摘要:
Control and observation laws are considered for a class of non-linear systems. An algebraic procedure is proposed to design approximate observer-based controllers. This procedure is similar to that used for linear time-invariant systems. The paper is completed by an example based on elastically jointed robots.
ISSN:0020-7179
DOI:10.1080/00207179008934084
出版商:Taylor & Francis Group
年代:1990
数据来源: Taylor
|
5. |
Lyapunov-like methodology for robot tracking control synthesis |
|
International Journal of Control,
Volume 51,
Issue 3,
1990,
Page 567-583
ZORANR. NOVAKOVIC,
Preview
|
PDF (338KB)
|
|
摘要:
Based on the Lyapunov theory, a new principle of synthesizing robot tracking control of the ‘resolved acceleration’ type is developed. A general Lyapunov-like tracking concept is used as the basis for the control algorithms derived via two different forms of Lyapunov functions. The main contribution is a result for (robust) tracking end-effector (cartesian) motion which obviates the need to invert the jacobian matrix or otherwise solve for desired joint-space coordinates from the given cartesian-space coordinates. Another advantage of the presented algorithms is that they guarantee tracking with a finite prescribed time.
ISSN:0020-7179
DOI:10.1080/00207179008934085
出版商:Taylor & Francis Group
年代:1990
数据来源: Taylor
|
6. |
Optimal robust stabilization compensator design: a deterministic approach |
|
International Journal of Control,
Volume 51,
Issue 3,
1990,
Page 585-599
DAN IONESCU,
JING-YUE LIN,
Preview
|
PDF (356KB)
|
|
摘要:
The problem of designing multivariable stabilization controllers that satisfy an optimal condition is considered in this paper. Specifically, it is required to find a robust stabilization controller so that closed-loop stability and asymptotic regulation occur, and also so that a quadratic performance index will be minimized. Necessary and sufficient conditions for a robust optimal output-feedback stabilization are presented. The gradient is considered over a functional defined on matrix spaces. Conditions for an optimal point are derived for this kind of functional. Finally, an algorithm for the robust optimal output-feedback design and an example are given.
ISSN:0020-7179
DOI:10.1080/00207179008934086
出版商:Taylor & Francis Group
年代:1990
数据来源: Taylor
|
7. |
Design of P-I controllers for DC-to-DC power supplies via extended linearization |
|
International Journal of Control,
Volume 51,
Issue 3,
1990,
Page 601-620
HEBERTT SIRA-RAMIREZ,
Preview
|
PDF (562KB)
|
|
摘要:
In this article, the method of ‘extended linearization’ is used for designing stabilizing non-linear proportional-integral (P-I) controllers which regulate to a constant value either the average output voltage or the average input current of PWM controlled DC-to-DC power converters such as the boost, the buck-boost and the Cuk converters, The design is carried out on the basis of the Ziegler-Nichols P-I controller design method applied to a family of linearized transfer function models of converters parametrized by constant operating equilibrium points of the average PWM controlled circuit.
ISSN:0020-7179
DOI:10.1080/00207179008934087
出版商:Taylor & Francis Group
年代:1990
数据来源: Taylor
|
8. |
Squaring down of non-strictly proper systems |
|
International Journal of Control,
Volume 51,
Issue 3,
1990,
Page 621-629
SABERI,
P. SANNUTI,
Preview
|
PDF (216KB)
|
|
摘要:
In an earlier work, a procedure for squaring downpropersystems by static and dynamic compensators has been developed. The compensators designed there have the following properties: (a) they are asymptotically stable; (b) the additional finite zeros induced by them are assignable to the open left half complex plane; and (c) they preserve the fundamental properties such as stabilizability, detectability, infinite zero structure and minimum phase nature of the original system. The earlier design procedure is extended tonon-strictly propersystems while retaining all the above-mentioned properties.
ISSN:0020-7179
DOI:10.1080/00207179008934088
出版商:Taylor & Francis Group
年代:1990
数据来源: Taylor
|
9. |
Algorithm for simultaneous stabilization of single-input systems via dynamic feedback |
|
International Journal of Control,
Volume 51,
Issue 3,
1990,
Page 631-642
DONG-NAN WU,
WEI-BING GAO,
MIAN CHEN,
Preview
|
PDF (288KB)
|
|
摘要:
Using a sufficient algebraic stability criterion for polynomials, an algorithm is deduced for the design of dynamic feedback which simultaneously stabilizes a set of single-input systems. The application of this algorithm to the stabilization problem of an aircraft is also presented.
ISSN:0020-7179
DOI:10.1080/00207179008934089
出版商:Taylor & Francis Group
年代:1990
数据来源: Taylor
|
10. |
Almost exact modelling assumption in adaptive linear control |
|
International Journal of Control,
Volume 51,
Issue 3,
1990,
Page 643-668
LAURENT PRALY,
Preview
|
PDF (724KB)
|
|
摘要:
Modem adaptive controllers are known to give bounded solutions when the system ‘normalized’ unmodelled effects are bounded by a small constant. This paper studies this unusual characterization of uncertainties. We show it encompasses more classical approaches. We discuss how feedback and by-passing may allow this assumption to be satisfied. We conclude by proposing the notion of almost exactly linearly modelled systems.
ISSN:0020-7179
DOI:10.1080/00207179008934090
出版商:Taylor & Francis Group
年代:1990
数据来源: Taylor
|