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由于试车时随着工况的变化,导弹的振动状态也在不断发生变化,这对减振控制造成了巨大困难,采用常规的被动阻尼方式已无法解决该问题,提出采用可控磁流变阻尼器进行减振控制方法。搭建了变阻尼减振控制研究试验系统,并进行仿真计算研究。先建立梁的有限元模型进行模拟计算,然后进行变阻尼修正算法公式推导,在这个过程中要实测响应谱的变量与阻尼器输入电压之间的关系,然后用多项式拟合,得到两者之间的准确关系,确定阻尼系数与响应谱变化之间的关系,以达到控制的目的。将参考谱代入仿真程序里,进行控制,得到的响应谱基本进入到容差范围之内。
Due to the change of working conditions during the test, the vibration state of missiles is constantly changing, which brings great difficulties to vibration control. The conventional passive damping method can not solve the problem, and the controllable magnetorheological damping Vibration damping control method. Set up a variable damping damping control research test system, and simulation study. Firstly, the finite element model of the beam is established for simulation calculation, and then the formula of the variable damping correction algorithm is deduced. In this process, the relationship between the response spectrum and the input voltage of the damper must be measured, and then the polynomial fitting Between the exact relationship between the damping coefficient and response to determine the relationship between changes in the spectrum in order to achieve the purpose of control. The reference spectrum into the simulation program, control, the response spectrum obtained basically into the tolerance range.