主动连续变刚度结构体系(ACVS)控制方法研究

Research on control algorithm for active continual variable stiffness system

主动变刚度控制是一种新的结构振动控制方法。该方法的控制效果虽然低于主动控制但其优点是不需要较大的外界能量输入,而且控制效果优于被动控制。主动变刚度控制的核心是控制算法的研究,到目前为止,国内外学者已经提出了一些有效的控制算法,本文作者研制了一种位移相关型的电磁摩擦控制装置,该控制装置所提供的控制力变化连续、可逆、迅速。将其安装在结构上组成的结构体系为主动连续变刚度体系(ACVS)。本文根据电磁摩擦控制装置的特点,将高阶单步控制算法用于主动连续变刚度体系,提出一种新的最优控制方法。算例结果表明,对于底层柔性结构,主动连续变刚度控制效果显著,与主动控制效果相当,但优于主动变刚度控制和被动控制。

Frictional force of the Electromagnetic Friction(EF) damper is varied with electric current. The effect of the EF damper is continuous, with rapid response and recognizing reverse. When the EF damper is fixed on the structure, the structural system is known as the Active Continual Variable Stiffness System (ACVS). In this paper, the high order single step algorithm is applied to ACVS. According to characteristic of the EF damper, a kind of instantaneous optimal algorithm is proposed, and the algorithm computer simulation results of which has demonstrated that the efficiency of the Active Continual Variable Stiffness control is equal to active control but more effective than the active variable stiffness control and passive control.