A vehicle energy-fed active suspension system with variable stiffness and damping

Abstract

The invention discloses an automotive energy-regenerative active suspension system with rigidity and damping variable. The suspension system comprises a suspension variable-rigidity mechanism, a suspension energy-regenerative mechanism and an active suspension control system. The suspension variable-rigidity mechanism comprises a low-rigidity spring, a magneto-rheological damper and a high-rigidity spring. The suspension energy-regenerative mechanism is formed by bi-directionally connecting a linear motor, an energy-regenerative circuit and a storage battery in sequence. The active suspension control system includes a controller. The data input end of the controller is connected with a vibration measuring and processing circuit. The magneto-rheological damper and the control input end of the linear motor are respectively connected with the control output end of the controller. The suspension system can automatically adjust the damping and rigidity at the same time, so that the good steering stability and ride comfort of a finished automobile are achieved; the control system is high in response speed; energy consumption is substantially lowered, and therefore the economy requirement of the finished automobile is met; moreover, the structure and a control algorithm are simple, working is stable and reliable, service life is long, and the suspension system can be conveniently applied to an existing automotive suspension so that real-time control can be achieved.

Description

technical field [0001] The invention relates to a suspension system for automobiles, more specifically, to an energy-feeding active suspension system for automobiles with variable stiffness and damping. Background technique [0002] The automobile suspension system has a great influence on the ride comfort and handling stability of the whole vehicle. Therefore, the suspension system has been widely studied in recent years. At present, the suspension system can be divided into three categories: passive suspension, semi-active suspension and active suspension. Passive suspension is a traditional all-mechanical suspension system. It has the advantages of simple structure, reliable performance, low cost, and no need for additional energy, so it is the most widely used; shortcoming. Semi-active suspension uses passive but parameter-adjustable passive components (usually damping components) to replace the active components of the actuator, which can partially improve ride comfor...

AI Technical Summary

Problems solved by technology

[0004] At present, most of the commonly used active suspension forms are realized by direct coupling of air springs, double-acting cylinders and high-speed response hydraulic control valves, but they all have disadvantages such as slow response, complex structure, large volume, and high energy requirements. At the same time, the existing linear motor active suspension has problems such as complex structure, poor reliability, and difficulty in stiffness adjustment; there are also some active suspensions that use magneto-rheological dampers, but none of them can achieve real-time adjustment of stiffness and damping

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