【摘 要】
：
A parametric multiobjective design approach based on a proportional-integral(PI)controller and a full-state observer is proposed for output regulation in a multivariable linear system.First,a complete parametric form of the observer-based PI control law i
【机 构】
：
Center for Control Theory and Guidance Technology,Harbin Institute of Technology,Harbin 150001,China
论文部分内容阅读
A parametric multiobjective design approach based on a proportional-integral(PI)controller and a full-state observer is proposed for output regulation in a multivariable linear system.First,a complete parametric form of the observer-based PI control law is established,which yields a closed-loop system with the desired eigenstructure and ensures that the regulated output asymptotically tracks a given constant signal in the presence of constant but unknown disturbances.All design degrees of freedom are preserved and characterized using a set of parameter vectors.Second,a separation principle of eigenvalue sensitivities is proven,and based on this result,the parameters of the closed-loop system are comprehensively optimized to reduce the eigenvalue sensitivity and the control gain,and also to enhance the tolerance to time-varying disturbances.Finally,the proposed method is applied to attitude control of a flexible spacecraft.Moreover,numerical simulations based on practical engineering parameters are performed to verify the superiority of the proposed method over traditional proportional-integral-derivative(PID)control methods.
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