Semi-active vehicle suspension system with vibration energy recycling function and control method thereof

Abstract

The invention discloses a semi-active vehicle suspension system with a vibration energy recycling function. The system comprises a damper, a spring, a control system and an energy recycling system; the damper comprises a hydraulic cylinder, a hydraulic motor, a direct-current motor, a first transmission shaft, a first roller clutch, a second roller clutch, a first bevel gear, a second bevel gear, a third bevel gear and a second transmission shaft; the control system comprises a suspension vibration controller, a force sensor, a sprung mass acceleration sensor, a sprung mass displacement sensor, a non-sprung mass displacement sensor and a direct-current motor driver; the energy recycling system comprises an energy recycling circuit and a super capacitor. The invention further discloses a control method of the semi-active vehicle suspension system with the vibration energy recycling function. Accordingly, the working stability and reliability are high, the energy feedback efficiency is high, the service life of a vehicle-mounted storage battery can be effectively prolonged, parameters of a semi-active suspension can be duly adjusted, and then the semi-active suspension is in an optimal vibration reduction state.

Description

technical field [0001] The invention belongs to the technical field of automobile suspension systems, and in particular relates to a vehicle semi-active suspension system with a vibration energy recovery function and a control method thereof. Background technique [0002] During the driving process of the car, due to the unevenness of the road surface and the vibration of the engine itself, the relative displacement between the sprung mass and the unsprung mass of the car is caused, which causes the car to vibrate. Most traditional suspensions use springs with constant stiffness and dampers with constant damping coefficients to form the core components of the automobile suspension system. However, due to the stiffness of the springs and the damping coefficient of the damper, they cannot be changed in real time according to the uneven characteristics of the road surface. , Therefore, the traditional suspension has poor adaptability to the road surface, and the vibration reduc...

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Problems solved by technology

Although the semi-active suspension shock absorber can realize the semi-active function, its structure is complex, difficult to produce and not easy to maintain, and at the same time, the production cost is high, and it needs to consume the energy of the vehicle itself

[0005] In recent years, due to the lack of resources and environmental problems such as air pollution, people have paid more and more attention to energy issues. Human beings have sought various methods to improve energy efficiency. Automobiles are one of the indispensable means of transportation in modern society. However, The energy utilization rate of the car is very low, the energy of the engine is generally less than 40%, most of the energy is dissipated in the atmosphere in the form of heat energy, and the braking of the car will also dissipate part of the energy. Vibration is an inevitable problem in the process of driving a car. Most traditional car suspensions convert vibration energy into heat energy through shock absorbers and dissipate it into the atmosphere, thus consuming a lot of energy in the car. Recycling has always been a hot and difficult issue in academic circles at home and abroad.

[0006] At present, the control algorithms of most controllable suspension control systems mostly use relatively simple algorithms. Each algorithm has its own advantages and also has its own shortcomings. frame deflection, but the improvement effect on vehicle body acceleration is unsatisfactory. Ground canopy contr

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