轨/姿控发动机推力矢量测试平台动态特性分析  

Analysis of thrust vector measuring platform for trajectory/attitude control engine dynamic characteristics

作　　者：孙宝元[1] 翟怡[1] 钱敏[1] 张军[1] 王志勇[1] 任宗金[1] 

机构地区：[1]大连理工大学精密与特种加工教育部重点实验室,辽宁大连116024

出　　处：《大连理工大学学报》2007年第5期667-670,共4页Journal of Dalian University of Technology

基　　金：国家自然科学基金资助项目(50475152;50675026);"863-805"重大国防专项资助项目

摘　　要：采用模态分析法解耦矩阵,建立轨/姿控火箭发动机推力与推力矢量测试平台系统的传递函数,采用有限元方法预估了固有频率,并通过实验模态分析方法对测试平台系统进行了精确测试,得出了测试平台在实际安装状态下4 kHz以内的各阶固有频率、阻尼比、主振型、留数等模态参数.验证了有限元方法的分析结果和测试平台系统的合理性,并通过仿真计算和模拟实际试车状态的实验,验证了所建立的传递函数的准确性.A transfer function was set up on the model of the thrust and thrust vector measuring platform for trajectory/attitude control rocket engine by using the principle of the mode-testing method to decouple the matrix. The finite-element analysis was used to evaluate the natural frequency. By using the mode-testing method, a more precise test of the measuring platform was clone in order to get the natural frequency, damping ratio, principal modes of vibration and residual under 4 kHz of the measuring platform in the actual installation estate, which proved the validity of the finite-element analysis and the reasonableness of the measuring platform system. By using the model to analyze the influence on measure results of system parameters on MATLAB/SimuIink environment, and experiment in the actual installation estate, the accuracy of the transfer function is proved.

关 键 词：传递函数 有限元分析 实验模态分析 动态响应 

分 类 号：TH823[机械工程—仪器科学与技术]