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MODELING AND SIMULATION OF A MICRO-VIBRATION ATTENUATING SYSTEM BASED ON FLEXIBLE SATELLITE MODEL

机译:基于柔性卫星模型的微振动衰减系统的建模与仿真

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One of the most important factors that affect the performance of precision payloads in the satellite is the micro-vibration generated due to static and dynamic unbalanced forces of high-speed rotary equipments. Due to the characteristic of low damping in the satellite structure, these micro-vibrations have long decay time and degrade the performance of precision payloads, particularly. For analyzing the influences of the micro-vibration due to CMGs module on the performance of precision payloads, a flexible satellite structure model is developed by using finite element method in this paper. For effective attenuating the micro-vibration from CMGs module, a parallel octo-strut isolation platform is provided. In the model, the damping component of the parallel octo-strut isolation platform is represented by a three-parameter dynamic model. Based on the model, the attenuating effect of the parallel octo-strut isolation platform on the micro-vibration of CMGs module is investigated. In addition, the influences when one or two struts failed on the isolation performance of the platform are also studied. The analysis results show that the influences of the micro-vibration from CMGs module on the precision payloads in the satellite can be effective attenuated by the parallel octo-strut isolation platform, and the platform have a high reliability.
机译:影响卫星精确有效载荷性能的最重要因素之一是由于高速旋转设备的静态和动态不平衡力而产生的微振动。由于卫星结构的低阻尼特性,这些微振动具有较长的衰减时间,尤其会降低精密有效载荷的性能。为了分析由于CMGs模块引起的微振动对精密有效载荷性能的影响,本文采用有限元方法建立了一个灵活的卫星结构模型。为了有效衰减CMG模块产生的微振动,提供了一个平行的八角撑杆隔离平台。在该模型中,并联八杆式隔振平台的阻尼分量由三参数动力学模型表示。在此模型的基础上,研究了并联式八向杆隔振平台对CMGs模块微振动的衰减作用。此外,还研究了一个或两个支柱失效时对平台隔离性能的影响。分析结果表明,并联八连杆隔振平台可以有效地衰减CMGs模块产生的微振动对卫星精密载荷的影响,并且该平台具有较高的可靠性。

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