Research And Optimization Of Excitation System On Dual-mass Flywheel Test Bed

Dual-mass flywheel is a new engine flywheel designed to increase the reliability of automobile clutch transmission torque and reduce vibration transmission. Development of dual-mass flywheel is inseparable from the test equipment, the performance of test equipment and test accuracy with dual-mass flywheel is closely related to the development. Only to ensure that the design of test equipment to meet certain requirements in order to ensure the dual-mass flywheel test quality. This topic aims at current dual-mass flywheel for the needs of R & D Manufacturing. According to the motion characteristics of dual-mass flywheel and the working environment, designed specifically test bed for a variety of dual-mass flywheel assembly for dynamic torsional stiffness and high-frequency torsional fatigue test.The main design concept of test bed is to simulate the working environment of dual mass flywheel, and achieve the higher frequency in the small-angle reciprocating between main and secondary flywheel on dual-mass flywheel. According to this idea we determine the basic principles of structure and composition of the test-bed system, and the vibration exciter, as the core component of the testing bed, is the main object of this paper.This article first analyze and compare three typical vibration exciter. After the analysis of their structural features and performance, chose the inertial vibration exciter excitation as the test-bed institution. This type of vibration exciter is controllable. Structure is more reliable and the production cost is reasonable. And then, for better carry out specific analysis and design to the vibration exciter, using the physics and mathematics knowledge to do the analysis and calculation, finishing the physical modeling and the mathematical modeling. Based on the requirements of test bed design, Initially set the parameters of the structural design of the exciter. On this basis, using the CATIA software to establish an accurate three-dimensional model, then import this model into ADAMS. After a series of structural constraints, attributes modify, and debug, we completed the virtual prototype which is able to do the multi-body dynamics simulation. Results of the running virtual prototype show that the virtual prototype model is accurate and effective. According to the feedback of data, the motion characteristics of the vibration exciter's preliminary design meet and exceed the design requirements. After the analysis of these results, modify the energy loss of exciter's proportion itself and improve design accuracy. Finally, according to the results of previous studies, the optimization scheme of the vibration exciter was selected. Established an optimization model about the shape and the installation location of semicircle eccentric block on the vibration exciter. Using mathematical analysis software MATLAB's optimization toolbox as a tool for optimization, preparing the related programming language, After the iteration gets a new design parameters, The Final checking prove that the new design parameters fits the design requirements, and effective reduction of the manufacturing materials, to some extent improve the life of the institution.