With the increasing demand for carcomfort, the design and improvement of suspension becomes more and moreimportant. Suspension is the general name of all force transfer connectingdevices between the frame and the axle or wheel of an automobile. Its functionis to transfer the force and torque between the wheel and the frame, such assupporting force, braking force and driving force, and to buffer the impactforce transmitted from uneven road surface to the frame or body, and toattenuate the vibration caused by it, so as to ensure the comfort of thepassengers, reduce the cargo and the vehicle itself. Dynamic load. Therefore,the suspension design of electric vehicle can make the vehicle have good ridecomfort and reliability.

Domestic research status:

In the automobile shock absorber basedon MATLAB environment, Zhao Feng established a detailed model of automobileshock absorber to simulate and Study on the basis of powerful MATLAB software.The mathematical model is further established and the program is written in theenvironment of MATLAB. The simulation results show that the calculationaccuracy of the damping characteristics reaches 90%, and the accuracy can meetthe needs of practical engineering problems.

Zhuge Xiaoyu used CATIA and ADAMSsoftware to study the motion performance of McPherson suspension in"Motion Analysis of McPherson Suspension Based on CATIA/ADAMS". Hebuilt three-dimensional model in CATIA and simulated it in ADAMS.

In 2012, Lu Jianhui of JiangsuUniversity developed the corresponding software system using UG open interfaceto realize the parametric design of McPherson front suspension kinematicssimulation model and validate the effectiveness of the optimization method.

Chen Wangwei's "Current Situationand Development Trend of Automotive Shock Absorbers" introduces theresearch and development trend of automobile shock absorbers.

In 2013, Zhou Yucun et al. took abi-directional cylinder hydraulic shock absorber for a vehicle as the researchobject in "Motion Simulation and Stress Analysis of Automotive ShockAbsorber". The physical model of the shock absorber was established byusing SolidWorks software, and the reliability of the design was verified byanalysis. All the analysis results provide theoretical guidance for the designof two-way cylindrical hydraulic shock absorber.

Torsional steering has an impact on thefront-drive vehicle using McPherson suspension, especially the engine torque ofthe front-drive vehicle is getting bigger and bigger, and the problem isbecoming more and more prominent. Li Jincan studies the causes of torsionalsteering and its impact on suspension performance, and draws his ownconclusions, which have great enlightenment for future researchers.

Geng Xuexiao and other optimizationproblems of the system damping matching of the McPherson suspension, using theperformance frequency domain analysis method to analyze the suspension motionperformance, using MATLAB software to get the Bode diagram, and changing thesuspension structure parameters, to get the suspension performance and vehiclemotion performance and comfort, get the best damping ratio.