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In this paper several optimal control strategies are proposed for the power management subsystem of a hybrid fuel cell/supercapacitor power generation system. The control strategies are based on different control configurations involving the power converters associated to the hybrid source. Given certain desired performances, Linear Matrix Inequalities methods are used to solve the controller design...
An H∞ filer on uncertainty discrete time system is studied in this paper. Through the way of linear matrix inequality, an H∞ filer designing for uncertainty system is transformed a question for settling optimization. In this paper the exist condition of H∞ is deduced. The method reduced calculated amount and easily separate Lyapunov matrix from parameter of system by importing an additional variable...
This paper provides a robust state feedback controller applied for an active suspension system. The controller presents guaranteed capacity to reject disturbances from the road even when the sprung mass of the vehicle is uncertain. The control gains are given from the solution of the H∞ guaranteed cost controller under quadratic stability, which is solved very fast and efficiently from a convex optimization...
Recent robust analysis techniques are applied to assess the robust stability and robust performances of the longitudinal control system of an aircraft. Two different uncertain models, polytopic or LFT models are considered. Robust analysis certificates are built by computing unique Lyapunov functions or parameter dependent Lyapunov functions (PDLF). Several criteria are dealt with: Closed-loop pole...
This study develops a robust modeling and stabilization framework for an interconnected lake-aquifer system in the field of hydrology. The conventional lake-aquifer dynamics are transformed into a multi-input multioutput linear time-invariant model with a bounded uncertainty. The robust performance of the system is obtained through an H-infinity controller to address a bounded model uncertainty, satisfactory...
To simplify the design and realization of controller, the method of robust H∞ static output feedback is discussed in this paper. A sufficient condition that satisfies given performance index is presented for constrained system, and an H∞ static output feedback control design method is proposed. By converting the constrained conditions and the elliptical set that contains output trajectory into a set...
Robust control design for complex flexible structures involves many consecutive essential steps. Additionally, many design parameters arise, which turn design optimization into a cumbersome and difficult task. This paper presents a comprehensive robust ℋ∞-optimal control design methodology for this class of systems. It relies on a pragmatic approach: The control engineer produces an initial design...
This paper considers the problem of robust H∞ filtering for uncertain discrete time-delay systems with stochastic perturbation. The model mentioned above is a particular case of the general time-delay systems for its stochastic state matrices. The problem to be addressed is the design of a filter that guarantees mean-square asymptotic stability and a prescribed H∞ performance level of the filtering...
This paper concerns the problem of distributed controller synthesis for a class of systems which we call “decomposable systems”. These systems have a special property that makes it possible to decompose them into a set of modal systems and approach the distributed control problem in an easy and effective way. In a recent paper of ours, we have shown a suboptimal H∞ controller synthesis method based...
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