全动舵系统柔性多体动力学建模方法  

A method for modeling flexible multi-body dynamics for all-movable rudder system

作　　者：杨执钧 张忠[1] 李芮[2] 高博[1] 郭静[1] YANG Zhijun;ZHANG Zhong;LI Rui;GAO Bo;GUO Jing(Key Laboratory of Reliability and Environment Engineering Technology,Beijing Institute of Structure and Environment Engineering;Beijing Institute of Structure and Environment Engineering:Beijing 100076,China)

机构地区：[1]北京强度环境研究所可靠性与环境工程技术重点实验室 [2]北京强度环境研究所,北京100076

出　　处：《航天器环境工程》2023年第5期447-454,共8页Spacecraft Environment Engineering

基　　金：可靠性与环境工程技术重点实验室基金项目(编号:61402100601)。

摘　　要：全动舵系统作为航天飞行器控制飞行姿态、调整飞行方向的部件,其动态特性对飞行器的正常工作起重要作用。为了开展带有电机伺服系统和舵轴间隙的全动舵系统动力学特性分析,提出基于柔性多体动力学方法的全动舵系统建模方法:采用Craig-Bampton方法建立典型舵面刚柔耦合降阶模型,采用多体动力学方法建立电动舵机连接机构与全动舵面连接,采用偶极子网格法建立基于模态的广义气动力模型。仿真结果表明,自建的模型预测颤振速度为1270 m/s,与商用软件预测对比的偏差小于2%,验证了该建模方法的正确、可行。研究表明,伺服系统的存在会令典型舵面响应存在较大跳跃现象,而舵轴间隙的存在则极大降低了舵面产生极限环振荡的临界速度。For the all-movable rudder system as a component to control the flight attitude and adjust the flight direction,its dynamic characteristics play an important role for the normal operation of a spacecraft.In order to analyze the dynamic characteristics of the all-movable rudder with motor servo system and rudder shaft gap,a method for modeling all-movable rudder system based on flexible multi-body dynamics was proposed.The rigid-elastic coupling reduced-order model for typical rudder surface was established via Craig-Bampton method.The connection mechanism between the motor and the all-movable rudder surface was created by multi-body dynamics method.The modal-based generalized aerodynamic model was produced using doublet lattice method.The simulation results show that the predicted flutter speed by the proposed model is 1270 m/s,with a deviation of less than 2%compared with a commercial software,verifying the correctness and feasibility of the modeling method.The research shows that the presence of servo system would cause a large jump in the response of the typical rudder surface,while the presence of the rudder shaft gap would greatly reduce the critical speed of the rudder surface to generate limit cycle oscillations.

关 键 词：伺服舵系统 柔性多体动力学 机电耦合 间隙非线性 颤振 极限环振荡 

分 类 号：V411.8[航空宇航科学与技术—航空宇航推进理论与工程]