海洋平台磁流变模糊半主动振动控制研究

为更有效地减小海洋平台动力响应,采用基于模糊控制算法的磁流变阻尼器对海洋平台的振动进行控制.以海洋平台位移响应误差和误差变化为输入变量、以最优控制力为输出变量,优化设计出模糊控制器,根据磁流变半主动控制算法提供接近于最优控制力的半主动控制力.数值仿真结果表明:在模糊磁流变控制中,无论是对于位移反应、速度反应还是加速度反应都可以实现非常有效的控制.

Study on MR semi-active vibration control for offshore platforms

In order to reduce the dynamic responses of offshore platform effectively,fuzzy magnetorheologic controller is adopted to control the offshore platform in this paper. Taking the error of offshore platform displacement responses and error variety as input variable,and the optimal control force as output variable,the optimal fuzzy controller is designed. Then magnetorheologic controller outputs the semi-active control force which is calculated by the magnetorheologic semi-active control arithmetic. The output control force approximates to the active control force calculated by the fuzzy control arithmetic to control offshore platform. Finally a numerical example of offshore platform is used in this paper. The simulation results show that displacement responses,velocity responses and acceleration responses of offshore platform by using fuzzy control method are reduced effectively.