机载光电系统外置被动隔振平台设计与分析

Design and analysis of external passive vibration isolation platform for airborne optoelectronic system

  • 摘要: 针对某无人直升机光电系统,开展基于Hexapod构型的外置被动隔振平台设计与验证。建立Hexapod隔振平台动力学模型,完成了隔振平台参数化建模,并基于Adams和Simulink联合仿真进行数字样机仿真分析,验证了模型的准确性;对研制的工程样机进行了扫频测试和线/角耦合响应测试。测试结果表明:隔振平台三方向线性激励固有频率均小于8 Hz,能够实现对直升机平台主振频点振动衰减,且耦合角摆动响应均方根值(root mean square, RMS)值小于200 μrad。最后完成了外场挂飞试验测试,证明隔振平台工程样机满足使用要求。

     

    Abstract: For an unmanned helicopter optoelectronic system, the external passive vibration isolation platform was designed and verified based on the Hexapod configuration. The dynamic model of the Hexapod vibration isolation platform was established, the parametric modeling of the platform was completed, and the theoretical analysis and simulation comparison of the digital prototype were carried out based on Adams and Simulink co-simulation to verify the accuracy of the modeling. The sweep frequency test and the line/angle coupling response test of the developed prototype were conducted. The results show that the natural frequency of the three-direction linear excitation of the vibration isolation platform is less than 8 Hz, which can realize the vibration attenuation of the main vibration frequency of the helicopter platform, and the RMS value of coupling angle swing response is less than 200 μrad. Finally, the field hanging flight test was completed, which verified that the engineering prototype of the vibration isolation platform met the operational requirements.

     

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