基于偏移量控制的MPC算法在预扭叶片振动控制中的应用

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Abstract In order to deal with the unstable vibration of wind turbine blades, this study is to investigate the application of the model prediction control (MPC) algorithm based on offset control in vibration control of pretwisted blades. The structure was modeled as a 2D pretwisted blade section with structural damping computed, which is based on the conversion from a general 2D flap/lag model into a flapping-angle/lagging-angle model, and incorporates the structural damping under different pretwisted angles. Aerodynamic expressions are based on the fitting Sin6 model. Stability analysis of time response and vibration control were investigated based on the MPC algorithm with offset control and given target values. The MPC algorithm is based on state-space description. The MPC performance was used to realize time-domain response analysis of displacement and manipulated signal display. It uses the penalty weighting for setpoint tracking and for changes in manipulated variables, and restricts the amplitude of output signal, forcing it to decrease rapidly. The robustness of the MPC algorithm was verified by varying structural damping, the coefficients of varying prediction horizon and the response analysis of different target parameters, and the comparison of the results of linear quadratic control.

Key words： Model prediction control structural damping fitting aerodynamic coefficient offset control penalty weighting prediction horizon

Received: 29 November 2017 Published: 28 June 2019

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	LIU Tingrui
	CHANG Lin

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LIU Tingrui,CHANG Lin. Application of the MPC algorithm based on offset control in vibration control of pretwisted blades[J]. JOURNAL OF VIBRATION AND SHOCK, 2019, 38(13): 172-178.

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http://jvs.sjtu.edu.cn/EN/ OR http://jvs.sjtu.edu.cn/EN/Y2019/V38/I13/172

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