准零刚度磁悬浮隔振平台主动混合控制系统设计

Design of Active Hybrid Control System for Quasi Zero Stiffness Magnetic Suspension Isolation Platform

为增强准零刚度磁悬浮隔振平台的隔振性能,减轻振源振动对隔振对象的干扰,优化其主动混合控制系统设计;改装传感器、功率放大器和驱动设备,将控制器调整至主动混合模式,调整系统电路的连接方式,完成控制硬件系统的设计;模拟准零刚度磁悬浮隔振平台工作过程,通过平台数据采集、特征提取和特征匹配等环节,检测平台被隔振对象的振动状态;测量振动状态下,测量准零刚度磁悬浮隔振平台实时电磁力,作为平台控制的初始值;在电磁理论的支持下,通过电磁力和电流控制量的计算,从主动和混合两个方面实现磁悬浮隔振平台的主动混合控制功能;测试实验结果表明:主动混合控制系统应用后,准零刚度磁悬浮隔振平台中作用在被隔振对象上的振动幅度和频率衰减率分别提高了62.34%和32.005%;在准零刚度磁悬浮隔振平台控制效果方面具有明显优势。

To enhance the isolation performance of the quasi zero stiffness magnetic levitation isolation platform,reduce the interference of vibration sources on the isolation object,and optimize the design of its active hybrid control system.Modify the sensors,power amplifiers,and drive equipment,adjust the controller to the active hybrid mode,improve the connection relationships of the system circuit,and complete the design of the control hardware system.Simulate the working process of the quasi zero stiffness magnetic levitation isolation platform,and detect the vibration status of the isolated object on the platform through the data acquisition,feature extraction,and feature matching of the platform.The real-time electromagnetic force of the quasi zero stiffness magnetic levitation isolation platform is measured under the vibration conditions,which is taken as the initial value for the platform control.With the support of electromagnetic theory,the active hybrid control function of the magnetic levitation isolation platform is achieved from both active and hybrid aspects through the calculation of electromagnetic force and current control quantities.Experimental results show that after the application of the active hybrid control system,the vibration amplitude and frequency attenuation rate of the isolated object in the quasi zero stiffness magnetic levitation isolation platform are increased by 62.34% and 32.005%,respectively.It has obvious advantages of control effect in the quasi zero stiffness magnetic levitation isolation platform.