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This paper studies a speed tracking and nonlinear disturbance rejection problem of PM synchronous motor. By formulating the problem as a robust output regulation problem of multivariable nonlinear system, we propose a robust output feedback control law by nonlinear internal model design. It is also worth mentioning that the control law, can not only achieve asymptotic tracking of desired speed, but...
In this paper, an output regulation problem with unknown-input driven exosystem is formulated and solved for a class of nonlinear plant with unity relative degree. To handle both bounded and unbounded exosystems, we relaxed the asymptotic convergence requirement on the closed-loop state to its associated steady-state and proposed an approximated regulator-equation condition. By using changing supply...
This paper investigates vibration control problem of a flexible marine riser coupled with the internal fluid dynamics. By applying Lyapunov's direct method, boundary control technique and high-gain observers, an output feedback boundary control is proposed to suppress the vibration of the riser system. With the proposed control, the control spillover is avoided and the stability of the closed-loop...
For nonlinear differential-algebraic equations system which satisfies linear growth condition and is of index one, this paper shows that there exists an appropriate sampling period such that the problem of sampled-data output feedback stabilization control can be solved. A linear explicit non-initialized observer is proposed, which means that the initial states of the observer are not necessarily...
In this paper, the piezoceramic actuators are used in fine steering mirror (FSM) for inter-satellite laser communication. To improve the control system performance and reduce the nonlinear hysteresis and creep of FSM, the characteristics of piezoelectric actuators is analyzed, and then an inverse model of feed-forward compensation and a feedback controller based on the Static Output Feedback (SOF)...
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