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

摘要:

为提升准零刚度磁悬浮隔振平台的隔振效果,降低振源产生振动信号对隔振对象产生的负面影响,优化设计准零刚度磁悬浮隔振平台主动混合控制系统。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。

Abstract:

To improve the isolation effect of the quasi zero stiffness magnetic levitation isolation platform and reduce the negative impact of vibration signals generated by the vibration source on the isolation object, an active hybrid control system for the quasi zero stiffness magnetic levitation isolation platform is optimized and designed. Modify sensors, power amplifiers, and drive equipment, adjust the controller to active hybrid mode, adjust the connection method of the system circuit, and complete the design of the control hardware system. Simulate the working process of a quasi zero stiffness magnetic levitation isolation platform, and detect the vibration status of the isolated object on the platform through platform data acquisition, feature extraction, and feature matching. Measure the real-time electromagnetic force of the quasi zero stiffness magnetic levitation isolation platform under vibration conditions, as the initial value for 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. The experimental results show that after the application of the active hybrid control system, the vibration amplitude and frequency attenuation rate acting on the isolated object in the quasi zero stiffness magnetic levitation isolation platform have increased by 62.34% and 32.005%, respectively. It has obvious advantages in the control effect of quasi zero stiffness magnetic levitation isolation platform.