多自由度伺服机构负载模拟系统建模与实验研究

摘要

The multiple degrees of freedom (DOF) load property of servo system was analyzed for a load simulating problem of thrust vector control system in a launch vehicle. A new load simulator structure and its mathematical model were presented. The simulation result shows that the output position dynamics of this system is in agreement with that of the actual system. The multiple DOF load property of a prototype experimental system was shown in a sweep frequency test. The simulation and experimental results verify the feasibility of this load simulator structure, which will lay a foundation for developing servo mechanisms of thrust vector control system in heavy launch vehicle.%针对运载火箭推力矢量伺服控制系统的负载模拟问题,分析了负载的多自由度特性,提出一种负载模拟系统结构并建立了数学模型.仿真结果表明,模拟系统中负载位置输出的动态特性与实际伺服机构负载的动态特性具有一致性.通过原理性实验,在负载的扫频实验中成功体现了负载的多自由度特性.仿真和实验结果证明了此种负载模拟原理的可行性.该负载模拟实验台可以为研制大型运载火箭推力矢量系统的伺服机构提供设计参考依据.