Research,Design and Experiment of an Aerospace Axial Eddy Current Damper
Compared with traditional dampers,eddy current dampers have the advantages of non-contact,friction free,wear free,long service life,pollution-free,and simple structure,and making them widely ap-plicable in the field of vibration control.In the design of eddy current dampers,the most critical damper characteristics need to be continuously optimized and iterated under the limit of certain size and weight in or-der to obtain meaningful optimal results.According to the requirements of damper used in aerospace field,this article presented a scheme of double-spring-plate structure eddy current damper with compact spatial structure by using the analysis method of transient magnetic field and the structural constraints.The variation law between key parameters(such as the thickness of permanent magnet,the conductor material,the con-ductor length,the gap of copper cup and permanent magnet)and damping coefficient were analyzed in de-tail,and the optimal damping coefficient was obtained,simultaneously designed the shape and stiffness of the spring-plate.Finally,the damper was manufactured based on relevant theoretical analysis and structural design,the damper was obtained the damping ratio,first-order natural frequency,and damping coefficient by using the half-power bandwidth method,and rigidity and life tests of the damper were completed on the testing platform,then the designed eddy current damper meets the design requirements.
eddy current damperdamping coefficientdouble-spring-platestiffnessdamping ratio
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