用于整星隔振效果评价的隔振器影响系数指标研究

Evaluating indicator of whole-satellite vibration isolation

对整星隔振系统的隔振效果评价指标(振动传递率、隔振器振级落差、功率流等)进行分析,通过实例证明采用隔振器底端到顶端的传递率来评价隔振效果是不充分的,而采用隔振器振级落差、功率流等指标也在实际应用中存在各自的局限性。在分析隔振器影响系数的基础上,提出一种改进的隔振器影响系数指标,并采用位移导纳表达改进的隔振器影响系数。以自行设计的新型整星隔振平台为例,采用改进的隔振器影响系数指标进行隔振效果预测,结果表明:改进的隔振器影响系数指标可以更加简单直观地表现出整星隔振平台的隔振性能。

Isolation performance of whole-satellite vibration isolation system was evaluated on the basis of a set of indexes such as transmission ratio of vibration,vibration level difference and power flow.However,it is inadequate to assess the isolation performance solely by use of vibration transmission ratio from the bottom of isolator to the corresponding part at the top,and even less,there also exist some limitations in applying vibration level difference and power flow to evaluate practical system.A modified version,the function of displacement admittance,was proposed to be the analysis index of impact ratio of isolator.Then it was introduced to evaluate the newly self-designed whole-satellite vibration isolation platform.The results indicate that the proposed appraisal method is of the advantage of featuring the isolation performance simply and intuitively.