Controller Design Problem (controller + design_problem)

Distribution by Scientific Domains


Selected Abstracts


Delay-dependent guaranteed cost gain-scheduling control of LPV state-delayed systems

OPTIMAL CONTROL APPLICATIONS AND METHODS, Issue 4 2008
I. B. Kucukdemiral
Abstract Delay-dependent gain-scheduling controller design problem is addressed for the linear parameter-varying state-delayed systems with time-varying delays. By choosing a Lyapunov,Krakovskii functional, delay-dependent conditions for the existence of guaranteed cost gain-scheduling controller are obtained. Besides, an algorithm is also presented to solve resultant nonconvex matrix inequalities in terms of linear matrix inequalities. Finally, three numerical examples with simulations are illustrated in order to demonstrate the validity of the proposed method. Copyright 2007 John Wiley & Sons, Ltd. [source]


Observer-based non-fragile control against measurement disturbances and controller perturbations for discrete systems with state delay ,

ASIAN JOURNAL OF CONTROL, Issue 3 2009
Xiaosheng Fang
Abstract This paper investigates the observer-based non-fragile control problem for a class of discrete time delay systems with measurement disturbances and controller perturbations. A simultaneous state and disturbance estimation technique is developed by designing a state observer for a descriptor system obtained from the original system. Based on this observer, the design method of a non-fragile controller is then formulated and the controller design problem is transformed to a convex optimization problem, which can be solved by a linear matrix inequality approach. In this design, the additive and multiplicative forms of uncertainties which perturb the gains of control and observer are both considered. The resultant non-fragile observer-based controller guarantees that the closed-loop system is asymptotically stable and can tolerate measurement disturbances and a certain degree of controller parameter perturbation. A numerical example is given to illustrate the effectiveness of the proposed design method. Copyright 2009 John Wiley and Sons Asia Pte Ltd and Chinese Automatic Control Society [source]


Two-degree-of-freedom controller design for linear parameter-varying systems

ASIAN JOURNAL OF CONTROL, Issue 1 2008
Wei Xie
Abstract A design strategy for linear parameter-varying (LPV) systems is considered in a two-degree-of-freedom (TDOF) control framework. First, a coprime factorization for LPV systems is introduced. Second, based on the coprime factorization, a TDOF control framework of linear timeinvariant systems is extended to that of LPV systems. Good tracking performance and good disturbance rejection are achieved by a feedforward controller and a feedback controller, respectively. Furthermore, each controller design problem can be formulated in terms of a linear matrix inequality related to the L2 gain performance. Finally, a simple design example is illustrated. Copyright 2008 John Wiley and Sons Asia Pte Ltd and Chinese Automatic Control Society [source]


Design of robust quadratic-optimal controllers for uncertain singular systems using orthogonal function approach and genetic algorithm

OPTIMAL CONTROL APPLICATIONS AND METHODS, Issue 5 2008
Shinn-Horng Chen
Abstract This paper discusses the robust-optimal state feedback controller design problems of linear singular systems under the structured (elemental) parameter uncertainties by using the orthogonal function approach (OFA) and the hybrid Taguchi genetic algorithm (HTGA). A sufficient condition is proposed to ensure that the linear singular systems with the structured parameter uncertainties are regular, impulse free, and asymptotically stable. Based on the OFA, an algorithm only involving algebraic computation is derived in this paper and then is integrated with the HTGA to design the robust-optimal state feedback controller of linear uncertain singular systems subject to robust stability constraint and the minimization of a quadratic performance index. A design example of a two degree of freedom mass,spring,damper system is given to demonstrate the applicability of the proposed approach. Copyright 2008 John Wiley & Sons, Ltd. [source]