A multi-mode electromagnetic energy-feeding vehicle active suspension actuator and its control method

Abstract

The invention discloses a multi-mode electromagnetic energy-regenerative vehicle active suspension actuator. The multi-mode electromagnetic energy-regenerative vehicle active suspension actuator comprises an actuator main body and an actuator controller, wherein the actuator main body comprises a piston cylinder, a permanent magnet linear motor module, an adjustable damping vibration absorber module, an actuator upper end cover and a lower lifting lug. The permanent magnet linear motor module comprises a secondary piston rod, a linear motor upper end cover, a linear motor lower end cover, a plurality of silicon steel sheets, a plurality of primary coils and a permanent magnet; the adjustable damping vibration absorber module comprises a vibration absorber piston rod, a sleeve, an upper lifting lug, a sealing separation plate, a big piston, a small piston, a damping liquid passage and a proportional electromagnetic valve; and an input end of the actuator controller is connected with an acceleration sensor, a sprung mass speed sensor and an unsprung mass speed sensor. The invention further discloses a control method for the multi-mode electromagnetic energy-regenerative vehicle active suspension actuator. The invention is advantaged in that the energy-regenerative efficiency of the multi-mode electromagnetic energy-regenerative vehicle active suspension actuator is high, the service life of a vehicle-mounted storage battery can be effectively prolonged and an active suspension is in an optimal vibration absorbing state.

Description

technical field [0001] The invention belongs to the technical field of automobile suspension systems, and in particular relates to a multi-mode electromagnetic energy-feeding vehicle active suspension actuator and a control method thereof. Background technique [0002] Since the parameters of the traditional passive suspension such as stiffness and damping are fixed, it can only determine a compromise solution that meets the requirements of all aspects as much as possible, which affects the ride comfort and ride comfort of the car to a certain extent. Obviously, the traditional passive suspension can no longer meet people's needs, which requires a new type of vehicle suspension, and the active suspension is to adjust the suspension parameters in a timely manner according to the vehicle's motion state and road conditions, so that it can In the state of optimal vibration damping. [0003] Active suspension is generally a closed-loop control system composed of sensors and acti...

AI Technical Summary

Problems solved by technology

[0005] However, the energy self-supply active suspension actuators in the prior art still have defects such as complex structure, slow response, poor reliability, high energy consumption, and high cost. The goal of vehicle ride comfort and operational stability may worsen the driving situation. In view of this, a new type of electromagnetic linear actuator is designed, which can not only play the role of a general electromagnetic actuator, but also act as an actuator. When the shock absorber fails, it can play the role of a passive shock absorber, thereby attenuating the vibration transmitted from the uneven ground to the vehicle body through the wheels, which can be said to kill two birds with one stone

[0006] Most of the existing inventions do not take into account that when the electromagnetic actuator fails, the suspension performance will become very bad, the handling stability and smoothness of the vehicle will deteriorate, and the driving safety will be affected in severe cases; To achieve the theme of energy feeding and energy saving as much as possible while improving ride comfort

[0007] In addition, the control methods of energy self-supply active suspension actuators in the prior art often focus on a certain aspect of the performance of the active suspension, without the overall performance of the comprehensive energy self-supply active suspension actuator, resulting in the actuator being The active control effect is not obvious during the working process, and the switching speed between the energy feedback mode and the active control mode is too frequent, which causes a serious hysteresis effect in the system and has a great impact on the life of the battery; The control method of the motor speed in the device needs to be improved, and the existing technology cannot make the active suspension in the best vibration reduction state.

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