半主动干摩擦阻尼器在隔振系统中的抗冲击优化设计研究

摘要

建立了吸力型电磁铁的电磁和动力学模型,得到了控制电压与电磁力的关系,通过调节施加在摩擦片上的电磁力,达到控制干摩擦力的目的,从而得到了一个新型半主动式的干摩擦阻尼器.根据最优抗冲力理论,设计了半主动式干摩擦阻尼器与隔振器并联的隔振抗冲系统.通过PID控制,该设计可以在不影响隔振性能的同时,极大的提高系统的抗冲击性能.冲击响应和极限性能分析的结果均表明:该优化设计比传统的抗冲设计具有更高的抗冲击性能.%The mechanical model of an electromagnet was built, the relationship between its control voltage, and electromagnetic force was obtained. The dry friction force was controlled by adjusting the electromagnectic force exerted on the friction sheets. A new semi-active control dry friction damper was designed based on the above idea. According to the optimal shock isolation theory, a vibration and shock isolation system was designed, it was composed of a semi-active control dry friction damper and a vibration isolator. Through PID control, the performance of shock isolation could be improved greatly while the performance of vibration isolation was not affected. The results of shock response and limit performance analysis showed that the proposed optimal design has much better anti -shock performance than the conventional one does.