微振动测试平台及其标定方法

由于航天器在轨运行时产生的微振动会对其成像质量和指向精度等关键工作性能产生较大影响,通过地面试验测试航天器各活动部件的微振动特性对航天器的减振/隔振设计至关重要,为此研制了两种微振动测试平台:应变式微振动测试平台(strain micro-vibrations testing platform,简称SMTP)和压电式微振动测试平台(piezoelectric micro-vibrations testing platform,简称PMTP)。为了获得高精度的测试结果,分别针对SMTP和PMTP开发了高精度的标定方法,并通过试验测试对两种测试平台的工作性能进行检验。结果表明,SMTP和PMTP的测试误差分别在±1.10%和±4.94%以内,且二者对同一微振动的振动幅值的测试误差在±4.36%以内。

Research on Micro-vibrations Testing Platform and Corresponding Calibration Method

The micro-vibration generated by the motion equipment on spacecraft significantly influences the imaging quality and pointing accuracy of spacecraft. The key to designing the damping and isolation for the spacraft is the use of precise tests of the micro-vibrations on Earth. We invented two kinds of testing platforms, strain micro-vibrations testing platform (SMTP) and piezoelectric micro-vibrations testing platform (PMTP), to test the micro-vibrations, and proposed accurate calibration methods to achieve high precision for both platforms. Experimental results showed that the testing errors of SMTP and PMTP were within ±1.10% and ±4.94% respectively, and the testing error of SMTP and PMTP of the same micro-vibrations was within ±4.36%.