电梯机械振动的频域最优主动控制

Frequency-domain-based optimal control of mechanical vibration of high-speed elevators

采用振动的主动控制方法对电梯机械振动进行控制。按频域H2 最优控制来设计控制律 ,使闭环系统的从外扰至系统的受控输出的传递函数阵的H2 范数为最小。闭环系统采用电梯轿厢的振动加速度作为反馈信号 ,将使振动的主动控制在工程上易于实现。数值仿真结果表明 ,系统的闭环传递函数能得到很大的抑制 ,频域最优控制的效果是明显的 ,有效的。与时域最优来设计控制律相比 。

Because of the variety of working conditions and the time\|varying property of the mechanical system of high\|speed elevators, the controlled response from the passive vibration control method is not satisfactory. Active vibration control techniques are introduced in this paper to suppress the excessive vibration response of the elevator car. Frequency\|domain\|based optimal control method is employed to design the controller so that the \%H\-2\% norm of the closed transfer functions from the outside disturbs to the regulated outputs of the system is minimized. Acceleration responses of the elevator car are used as the feedback signal and thus engineering implementation of the active control will be simplified. Computer simulations show that there is a great reduction of the closed transfer functions compared with the uncontrolled ones and thus the control is effective. In comparison with the time\|domain\|based optimal control technique, the method employed in this paper offers a good match between the control concept and engineering practice.