| With the appearance of shortage of energy and environmental issues,electric cars withthe features of Integrated, lightweight and intelligent gradually enter people’s vision inthe future. However, traditional suspension system still occupies an important positionin innovative electric wheel. With the pace of technological development, whether elec-tric wheel or suspension system, the concept of the traditional structure will be brokenaccompanied with the appearance of new technology and products. Traditional suspen-sion system will gradually be replaced by electronically suspension with small size, highreliability and strong manipulative, which will become the future trend of development inthe suspension system. Since the hub motor is introduced to Electric Vehicle with WheelDrive, so that the unsprung mass of the vehicle is increased, resulting in deterioratedperformance compared to the conventional suspension, which is a serious problem existsin the suspension system currently.This paper researched the methods that can guarantee riding, handling and stabilityof active suspension of electric vehicle with wheel drive. In order to meet the needs ofsimulation based on AMESim software environment, this paper established the dynamicsmodel of electromagnetic active suspension that combination of permanent magnet syn-chronous motors, gear rack and active suspension. It can be used as the active controlalgorithm applied to a variety of electric vehicle with wheel drive.This paper used constrained state feedback control method for controlling the sus-pension, This control method is through the H∞to ensure system performance and con-straints. Meanwhile, the paper use feld oriented control scheme, id=0current controlmethod and feedback linearization controllers to control the torque of Permanent magnetsynchronous motor.Finally, in accordance with the method of solving the controller, we design a twodegree of freedom active suspension controller and a feedback linearization controller forthe motor. In AMESim simulation environment, through closed-loop simulations, weverify the efectiveness of the electromagnetic active suspension control and permanent magnet synchronous motor. As we can be seen from the simulation curve of permanentmagnet synchronous motor, its torque can be followed, And the feedback linearizationcontroller is able to achieve good control efect. The active suspension with high practicalvalue can guarantee vehicle handling and stability, but also to maximize the vehicle ridecomfort. |
