Multi-mode hybrid suspension actuator and control method thereof

Abstract

The invention discloses a multi-mode hybrid suspension actuator and a control method thereof. The multi-mode hybrid suspension actuator comprises an actuator body and a control unit, wherein the actuator body comprises an air spring mechanism, a double-rod type magnetorheological damper, an upper linear motor unit and a lower linear motor unit, wherein the double-rod type magnetorheological damperis arranged in the air spring mechanism; the upper linear motor unit is arranged at the upper part of the double-rod type magnetorheological damper and is positioned in the air spring mechanism; andthe lower linear motor unit is arranged at the lower part of the double-rod type magnetorheological damper. The method includes the following steps: I. preforming data acquisition and synchronous transmission; II. calculating the ideal damping force under LQG control of a vehicle suspension; III. calculating the root mean square value of the weighted acceleration of the vehicle; and IV. controlling the multi-mode hybrid suspension actuator. The actuator is novel and reasonable in design, convenient to realize, low in cost, high in working stability and reliability, high in energy feeding efficiency and high in real-time performance, can enable the hybrid suspension to be in an optimal vibration damping state, is strong in practicability, and convenient to popularize and use.

Description

technical field [0001] The invention belongs to the technical field of vehicle suspension actuators, and in particular relates to a multi-mode hybrid suspension actuator and a control method thereof. Background technique [0002] When the vehicle is running, the vehicle vibrates due to the excitation of the unevenness of the road surface. At present, what is widely used in automobiles is to realize the functions of damping vibration and carrying the body through passive suspension (composed of shock absorbers, elastic elements, etc.). However, the performance parameters (stiffness and damping) of the passive suspension cannot be adjusted in real time according to the actual working conditions of the vehicle during driving. The frame converts the energy of the vibration of the car into heat energy and dissipates it in the air through the shock absorber and the elastic element, and it is not utilized. Due to the shortcomings of the passive suspension that cannot adjust the v...

AI Technical Summary

Problems solved by technology

However, the failure of the linear motor actuator is not considered. If the actuator fails, it will have no effect on energy recovery.

At the same time, the linear motor occupies too much invalid volume in the air spring, which will indirectly lead to an increase in the volume of the composite semi-active suspension.

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