论文部分内容阅读
利用电磁力随电磁场强度变化而改变的原理,设计电磁支撑与机械支撑并联的试验装置,实现机械系统支撑刚度参数随电磁场强度的变化.通过对试验装置数学模型的研究和线性化分析,给出了通过控制电流的随机改变实现机械系统支撑刚度参数随机变化的四个设计准则.线性化准则可保证机械系统支撑刚度的线性特性;线性随机准则能确保支撑刚度参数与随机控制电流间的线性关系;随机分量显著准则使得支撑刚度具有明显的随机特征,便于试验研究;综合刚度为正的设计准则,能够保证试验系统的稳定性.根据这些设计准则,制成了具有随机刚度支撑参数的模拟试验装置.试验表明,使用该试验装置可以较好地实现支撑刚度参数的随机模拟.
Based on the principle that electromagnetic force changes with the change of electromagnetic field strength, a test device with electromagnetic support and mechanical support parallel is designed to change the stiffness parameter of mechanical system with the change of electromagnetic field strength.Through the research and linearization analysis of the mathematical model of the test device, The four design criteria for random variation of supporting stiffness of a mechanical system are obtained by controlling the random change of the current.The linearization criterion can guarantee the linearity of the stiffness of the mechanical system and the linear stochastic criterion can ensure the linear relationship between the supporting stiffness parameter and the random control current The criterion of stochastic component makes the support stiffness have obvious stochastic characteristics, which is convenient for experimental study. The design criterion with positive integral rigidity can ensure the stability of the test system. According to these design criteria, a simulation experiment with random stiffness support parameters The experimental results show that the simulation of the stiffness of the support can be achieved well by using the experimental device.