Guaranteed properties of gain scheduled control for linear parameter-varying plants
Automatica (Journal of IFAC)
Robust guaranteed cost control for uncertain linear differential systems of neutral type
Applied Mathematics and Computation
Convex Optimization
Brief paper: Robust control of polytopic systems by convex optimization
Automatica (Journal of IFAC)
Computers & Mathematics with Applications
Survey Research on gain scheduling
Automatica (Journal of IFAC)
Exponential nonlinear observer based on the differential state-dependent Riccati equation
International Journal of Automation and Computing
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According to the increasing requirement of the wind energy utilization and the dynamic stability in the variable speed variable pitch wind power generation system, a linear parameter varying (LPV) system model is established and a new adaptive robust guaranteed cost controller (AGCC) is proposed in this paper. First, the uncertain parameters of the system are estimated by using the adaptive method, then the estimated uncertain parameters and robust guaranteed cost control method are used to design a state feedback controller. The controller's feedback gain is obtained by solving a set of linear matrix inequality (LMI) constraints, such that the controller can meet a quadratic performance evaluation criterion. The simulation results show that we can realize the goal of maximum wind energy capture in low wind speed by the optimal torque control and constant power control in high wind speed by variable pitch control with good dynamic characteristics, robustness and the ability of suppressing disturbance.