Optimization Design And Performance Analysis Of Integrated Electromagnetic Linear Regenerative Suspension

The chassis of intelligent and new energy vehicles puts forward the technical requirements of high efficiency,energy saving and active vibration reduction for suspension system.The electromagnetic energy regenerative suspension system recovers the vibration energy to make up for the electric energy consumed by active vibration reduction while giving full play to the advantages of active vibration reduction.The improvement of performance is in line with the high-end,intelligent and green development goals of the manufacturing industry proposed by the 20 th National Congress of the Communist Party of China.And it is an important development direction of automobile suspension technology.In order to realize the active vibration reduction and vibration energy collection of electromagnetic suspension.The innovation of electromagnetic active suspension architecture is the key to break through the performance bottleneck of traditional active vibration reduction technology.Efficient optimization method is the basis of electromagnetic active suspension research.And it is also the key common problem of active vibration reduction and energy feedback technology research.This paper focused on the structural design,working principle analysis,model building,performance analysis,optimization design and prototype test of the integrated electromagnetic linear regenerative suspension.The optimization design of integrated electromagnetic linear energy regenerative suspension was completed.The main works and results of this thesis are summarized as following:(1)The vibration reduction function and energy feeding function of the integrated electromagnetic linear energy regenerative suspension were designed.The contradiction between the structural size,damping performance and energy consumption of the electromagnetic active suspension was solved.Firstly,the key components were selected and analyzed,and the working principle of the linear DC actuator was described in detail.Then,combined with the simulation results of finite element software,the structural performance and electromagnetic performance of the linear DC actuator were determined.Finally,according to the specific structure selection,the structural scheme of the integrated electromagnetic linear regenerative suspension designed in this paper was determined.And the working principle was emphatically introduced.It laid a structural foundation for subsequent simulation research and optimization design.(2)The multidisciplinary coupling model of the integrated electromagnetic linear regenerative suspension system was analyzed.The performance evaluation index of the integrated electromagnetic linear regenerative suspension was studied.And the evaluation method of its performance index was clarified.The accuracy of the multidisciplinary coupling model of the integrated electromagnetic linear regenerative suspension system was verified by simulation.The analysis showed that the vibration reduction performance of the integrated electromagnetic linear regenerative suspension system was significantly improved compared with the traditional suspension system.The integrated electromagnetic linear regenerative suspension was compared with the traditional passive suspension on B-class road.The body acceleration reduced by 3.64%.The suspension dynamic deflection reduced by 30.9%.The improvement effect of tire dynamic deformation was not obvious,which is basically consistent with passive suspension.The integrated electromagnetic linear regenerative suspension was compared with the traditional passive suspension on C-class road.The body acceleration reduced by 8.86%.The dynamic deflection of the suspension reduced by 30.9%.The dynamic deformation of the tire reduced by 5.8%.The integrated electromagnetic linear energy regenerative suspension system could realize the recovery of vibration energy.The contradictory relationship between its vibration reduction characteristics and energy regenerative characteristics was analyzed.It provided a basis for subsequent optimization design.(3)The optimization method of integrated electromagnetic linear regenerative suspension was studied.The relationship between safety,comfort and energy saving of the integrated electromagnetic linear regenerative suspension was coordinated.A dimensionless hybrid optimization objective based on safety probability normalization was constructed.The quadratic Taguchi method was used to analyze the parameter correlation of the optimization parameters.And the weight between the optimization parameters and the optimization objectives was clarified to obtain the initial value range of the optimization parameters.The nearest neighbor particle swarm optimization was used to establish the TiPSO optimization method for local optimization.The global optimization framework was built based on the K-fold cross validation theory to obtain the optimal solution set.The reliability optimization design of the integrated electromagnetic linear energy regenerative suspension based on safety probability was completed.The results showed that the root mean square values of the optimized body acceleration and tire dynamic deformation decreased,but the suspension dynamic stroke increased slightly.The root mean square value of body acceleration reduced by 28.32%.The root mean square value of tire dynamic deformation reduced by 6.37%.The suspension travel increased by 9.8%,but was controlled within 10%safety range.The optimized average energy feedback power increased by 68.76%,and the performance improvement directly verifies the effectiveness of the optimization method.It provided data reference for subsequent prototype trial production and test verification.(4)Trial production and test verification of integrated electromagnetic linear energyregenerative suspension prototype.An integrated electromagnetic linear regenerative suspension test prototype was designed and manufactured.The test platform of integrated electromagnetic linear regenerative suspension system was built.The working principle of the integrated electromagnetic linear regenerative suspension system bench test platform was introduced in detail.The results showed that the error between the simulation value and the experimental value was less than 5%.The error was within the acceptable range.The effectiveness of the simulation and optimization design of the integrated electromagnetic linear regenerative suspension was verified.The working principle of the integrated electromagnetic linear regenerative suspension system bench test platform is introduced in detail.