伺服机构综合负载模拟试验系统

Comprehensive Load Simulation System of Servo Mechanism

针对大型运载火箭伺服机构所受实际负载情况,提出了一种综合负载模拟系统,能够模拟惯性、弹性、摩擦和常值负载。其中惯性负载、弹性负载以及伺服机构的柔性安装基础采用机械结构模拟,摩擦负载和常值负载采用液压系统来实现。分别对伺服机构、液压加载系统以及柔性结构进行建模,并以此为基础构造了系统的综合数学模型。仿真表明,该系统能够复现伺服机构实际工况下的负载特性,加载多余力也能得到很好的抑制。建立了负载模拟试验系统,实现了对各种负载及谐振特性的模拟,为伺服机构的地面测试和深入研究提供必要的实验基础。

According to the actual load suffered by a servo mechanism in a large launch vehicle,a comprehensive load simulation system was presented,which could simulate the inertia,elastic,friction and constant loads.The inertia load,elastic load and flexible assembling base of servo mechanism were simulated by the mechanical structures,and the friction load and constant load were simulated using a hydraulic system.A complete mathematical model was constructed by modeling the servo mechanism,its flexible structure and the loading hydraulic system.It is shown that this system can reproduce the load characteristics of the servo mechanism in actual situation,and the redundant force of the loading system is suppressed effectively.A load simulation system was developed for simulation of the loads and resonant characteristics,which provides the necessary fundamental facilities for ground test and further research of servo mechanisms.