Structural Optimization Design and Mechanical Identification of A New Satellite Antenna Pointing Mechanism
With the remarkable development of commercial aerospace industry,the commercial satellites tend to be small,low-cost and multi-function.The quality of satellite-borne data transmission antenna system directly determines the measurement,control and communication capability of a satellite.Aiming at the design requirements of commercial small satellites,a new antenna pointing mechanism with single arm frame and single compression point is designed.Further,based on the results of finite element modal analysis,the optimization design is carried out.After the optimization,the fundamental frequency of the mechanism is increased by 36.2%,from 63.2 Hz to 86.1 Hz.The pointing mechanism has a series of characteristics such as lightweight,miniaturization,low cost,high stiffness,high strength and high reliability.In order to verify the mechanical properties of the mechanism,the identification level vibration tests were carried out on the prototype of the pointing mechanism.The test results show that the fundamental frequency of the mechanism is about 85 Hz,the error is only 1.29%compared with the simulation results.At the same time,the response curve of the prototype in the before and after vibration tests have good repeatability,while the mechanism has no damage after visual inspection,which proves the stability and reliability of the mechanism.
satellite antenna pointing mechanismoptimization designmodal analysismechanical test
万方数据
维普
