宽频角振动地面模拟试验设备的研制

为了解并减小探月着陆系统之敏感器容易受到宽频角振动影响的任务风险,有必要进行宽频角振动地面模拟试验。文章首先提出了宽频角振动的振动转换结构和测量方法,在此基础上完成了试验设备的研制,之后针对探月着陆系统成像敏感器遭遇的角振动环境进行了地面模拟测试。测试结果表明：该试验设备的宽频角振动模拟频率范围为0～2000 Hz,控制精度达到±15%（2σ）,同时还可模拟包括平移和转动在内的着陆系统刚体运动。该设备已用于敏感器在角振动环境下的地面模拟试验验证。

Development of a ground facility for simulating wide-band angular vibration

To mitigate the task risks of the lunar and deep-space landers caused by the wide-band vibrations of its optics and microwave sensors,the ground simulation test is necessary.In this paper,firstly,a vibration transform structure and a measurement method are proposed and a ground facility for simulating the wide-band angular vibration simulation is developed.With regard to the angular vibration environment for the imaging sensor used for the moon lander,a measurement test is carried out.The results show that the simulator can have angular vibrations in a frequency range of 0 to 2000 Hz,with a control precision of ±15%,and the rotational and translational speeds can be also set to the required values of the lander.The facility has been implemented for validating the performance of optic sensors in the angular vibration environment.