Structural Design And Optimization For A Kind Of Micro-shaker

Spacecraft vibration testing is a very important part of the development process and it plays a vital role to verify the reliability of spacecraft in vibration environment. Shaker is the most critical equipment and it provides vibrating force for the specimen in the vibration testing. In the traditional method, the research and development of the shaker need long cycle, high cost, but the update of the shaker usually cannot keep up with the current demand and some other issues are exist too. The shaker model is established by using of simulation technology, the system simulation and optimization calculation is done, that can make up for the lack of real vibration test, and reduce the risk of the test, and save the cost, and improve efficiency. The shaker movable system and magnetic system problem in technology research of shaker for current are studied in this paper.First, based on the principle of electric shaker, the micro-shaker base, magnetic system, movable system, supporting spring plate and shell three dimensional models are designed by using CATIA software.Secondly, theoretical formula is deduced, which prove that micro-shaker movable system is important in modal vibration environment experimental. This paper shows out the design principle and material selection basis of the micro-shaker system. The modals of the movable system are calculated by using computer simulation software.Thirdly, the shaker magnet system is established by using ANSYS software, and the shaker field strength is simulated. Several different kinds of magnetic materials are comparative analyzed. The maximum of the shaker vibrating force is calculated by using electromagnetic induction theory.Finally, a movable system optimization mathematical model is established by using the MSC.PATRAN/NASTRAN software, the spring disc is optimized by using Tools-Design Study and Model Variables modules. The results show that the design meets the needs of the premise, and the quality is significantly reduced. Thereafter static analysis, frequency response analysis, modal calculation analysis are done, which compare and verify the reliability of this program. These ensure micro-shaker possesses good working frequency characteristics, and meets the basic requirements of the experimental design.