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高线加速度下热与振动复合环境试验通常以离心机为主体 ,在机臂上安装温度箱、振动台实现复合环境 ,由于离心力的作用 ,振动台动圈无法产生振动 ,导致动圈烧坏 .针对这个问题 ,笔者首先利用刚体动力学方法 ,对离心力场作用下振动台进行建摸 ,分析动圈产生偏离的原因和离心力场对振动台固有特性的影响 ,提出气囊位移反馈动圈纠偏系统的设计方案 ,并对气囊动态特性进行分析 ,最后对振动台模型进行修正 .分析表明 ,当固定气囊一个气室的气压 ,气囊的刚度随离心机转速的升高而增大 ,系统幅频特性曲线右移 .
Heat and vibration under high linear acceleration The composite environment test usually takes the centrifuge as the main body, installs the temperature box on the arm, and the vibration table realizes the compound environment. Due to the centrifugal force, the vibration of the moving table of the vibration table can not generate vibration and causes the moving coil to burn out. In response to this problem, the author firstly uses the rigid body dynamics method to build the shaking table under the action of the centrifugal force field, and analyzes the causes of the deviation of the moving coil and the influence of the centrifugal force field on the inherent characteristics of the shaking table. The dynamic characteristics of the airbag are analyzed and the model of the vibration table is finally corrected.The analysis shows that when the air pressure of a fixed airbag and the stiffness of the airbag increase with the increase of the centrifuge speed, the amplitude-frequency characteristic curve Move right