摘要:

AbstractA control law for a single‐tether orbiting satellite system based on a reduced order linear adaptive control technique is presented. The main advantages of this technique are its design simplicity and the facts that specific system parameters and model linearization are not required when disigning the conroller. Two controllers are developed: one which uses only tension in the tether as control actuation and one which uses both tension and in‐plane thrusters as control actaution. Both a sixth‐order non‐linear and an 11th‐order bead model of a tethered satellite system are used for simulation purposes, demonstrating the ability of the controller to manage an uncertain system. Retrieval and stationkeeping results using these non‐linear models and the linear adaptive controller demonstrate the feasibility of the method. The robustness of the controller with respect to parameter uncertainties is also demonstrated by changing the non‐linear model and parameters whithin the model without redesigning t

ISSN:0890-6327    

DOI:10.1002/acs.4480060102

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1992

数据来源: WILEY

摘要:

AbstractA variable structure model reference adaptive controller (VS‐MRAC) using only input and output measurements was recently proposed and shown to be globally asymptotically stable with superior transient behaviour and disturbance rejection properties. In this paper a singular perturbation approach is used in order to establish the robustness of the controller in the presence of unmodelled dynamics (parasitics) and disturbances. We develop a new Lyapunov‐based technique to analyse the overall system and show that for sufficiently small parasitics the system remains stable and the output error is small in some se

ISSN:0890-6327    

DOI:10.1002/acs.4480060103

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1992

数据来源: WILEY

摘要:

AbstractThe standard least squares (LS) estimation algorithm is modified in such a way that it becomes passive. Therefore the scope of application of the LS algorithm is extended to those adaptive schemes whose convergence proof is based on passivity. The passive version of LS is presented in both continuous and discrete time.

ISSN:0890-6327    

DOI:10.1002/acs.4480060104

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1992

数据来源: WILEY

摘要:

AbstractIn this paper we consider the problem of designing a controller for an uncertain linear time‐invariant (LTI) system; the control objective is that of asymptotic error regulation for reference and disturbance signals which are described by a known unforced differential equation. In particular, we are concerned with the case in which this differential equation describes linear combinations of sinusoidal and constant functions; we show that under mild (almost necessary) structural requirements on the plant, prior knowledge of the order of an LTI exponentially stabilizing compensator is sufficient to achieve this control objectiv

ISSN:0890-6327    

DOI:10.1002/acs.4480060105

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1992

数据来源: WILEY

ISSN:0890-6327    

DOI:10.1002/acs.4480060107

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1992

数据来源: WILEY

ISSN:0890-6327    

DOI:10.1002/acs.4480060101

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1992

数据来源: WILEY