Matlab hub motor analysis fuzzy PID control vertical vibration analysis

1、 Content abstract

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2、 Content description

Compared with traditional energy vehicles , Electric vehicles have their unique advantages , Now it has been paid more and more attention by the market and consumers , It's developing quite rapidly .

Relevant information display , There are two main forms of electric vehicles . One is a centralized drive electric vehicle , The other is a wheel drive electric vehicle . Compared with centralized drive electric vehicles , Wheel drive electric vehicles have many advantages . say concretely , Wheel drive electric vehicles save space , At the same time, the transmission chain is also quite short . meanwhile , Its manufacturing cost is not very expensive , Energy is also easier to reuse . therefore , At present, electric vehicle is the most important embodiment of wheel drive system , It is also a very key and important subject of electric vehicle drive technology . at present , Many experts at home and abroad have carried out a lot of research on electric vehicle technology .

However , Wheel drive electric vehicles are generally equipped with special power forms , This makes the vibration of wheel drive electric vehicles present a worsening trend . However, there are two disadvantages: the increase of unsprung mass and the torque fluctuation of hub motor , Both make the dynamic load of the tire and the vibration acceleration of the vehicle body much higher than before , It has a very bad impact on the grounding performance and smoothness of the tire . therefore , Strengthen the research on the power form of wheel drive electric vehicles , It is very important to avoid and reduce the influence of vibration . According to relevant information , The suspension system has a direct impact on the vibration of the vehicle , It also has a great impact on vehicle handling stability and safety , Therefore, the research on the suspension structure of electric vehicle has been paid more and more attention in the automotive industry . The researchers found that , The traditional suspension system has little help to the vehicle's ride comfort and handling stability . If you reduce the stiffness of the suspension , Then the value of the acceleration of the car body will decrease accordingly , The vehicle is more stable . meanwhile , The displacement of the vehicle body will also increase , And the load of the tire will also increase , This will cause the wheels to slip , The grip of the wheels will be reduced , This has a great impact on the stability of the car . If the suspension stiffness is increased , Then the stability of the vehicle will be improved . But there will be hard springs in the car , In this way, the car will be more sensitive to the condition of the road , The road is not so smooth . thus it can be seen , The traditional suspension has a certain improvement in the smoothness and handling stability of the vehicle , However, the ideal degree of suspension control is not high . If the active suspension system with strong control ability is selected, the vibration problem of the vehicle can be alleviated .

therefore , Aiming at the problem of vibration deterioration of wheel drive electric vehicles , The original wheel drive system is optimized , A special motor damping system is designed and simulated , It has a positive reference for reducing the impact of vibration and improving vehicle performance .

3、 Simulation analysis

 

 

4、 Reference paper

Vertical vibration analysis and structure optimization of wheel drive electric vehicle

Fuzzy control and Simulation of vehicle semi-active suspension _ Liu Bo