Dynamics Analysis And Optimization Of BSG System

With the improvement of people’s living standards,automobiles have become a necessary means of transportation for ordinary people.However,the increase of car ownership brings heavy burden to transportation.Traffic jam is a very common phenomenon in large and medium-sized cities.With the red light waiting,car engines idle for a long time in daily life,which not only increases the fuel consumption of engines,but also causes the emission of polluting gases to endanger the environment.。 In view of this situation,BSG(Belt-driven Starter/Generator Belt Drive Start/Generator Integrated Motor)technology is introduced at this stage.Under the environment of ADAMS system dynamics software,the virtual prototype model of the belt transmission system of the twin-arm engine accessory is established through Belt module.Based on the multi-body dynamic model,the system dynamics is studied under three conditions: starting,normal driving and braking.The results show that under the initial design,the pulley lags behind the belt and slips,the tensioner arm oscillates greatly under the starting condition,and the dynamic tension of the belt fluctuates greatly.The transverse vibration of the belt is also larger.Aiming at the above problems,a single objective optimization method for dynamic tension,swing angle of tensioning arm and transverse vibration of belt is proposed.Because of the difference of the influence degree of the three variables on the system,a multi-objective optimization method for three zero-varying co-optimization is proposed.The analysis and comparison results show that the multi-objective optimization method can not only effectively reduce the initial tension of the belt,but also improve the other performance of the system.Therefore,it is recommended to use the multi-objective optimization method in practical engineering applications.