Real-time control device and method for energy feedback damping of electromagnetic energy feedback type semi-active suspension

Abstract

The invention discloses a real-time control device and method for energy feedback damping of an electromagnetic energy feedback type semi-active suspension. The lower input end of an energy feedback motor is connected with a planetary gear acceleration mechanism, and the lower input end of the planetary gear acceleration mechanism is connected with the upper end of a ball screw; an energy feedback control circuit comprises a voltmeter, controllable switches and storage batteries; a charging voltage capable of meeting the energy feedback damping force is selected from the voltage of one storage battery, the voltage of two adjacent series storage batteries and the voltage of three series storage batteries, turn-on and turn-off of the corresponding controllable switches are controlled by a control unit, and the storage batteries are charged according to the principle that the storage battery with lowest voltage or the two adjacent series storage batteries with minimum voltage sum are preferentially charged; and the energy feedback motor can work in a rotating speed range with highest efficiency, the energy conversion efficiency is improved, and energy feedback damping of an electromagnetic energy feedback damping force generator is subjected to real-time hierarchical control.

Description

technical field [0001] The invention belongs to the technical field of vehicle suspension structure and control, in particular to an electromagnetic energy-feeding semi-active suspension control device and method for vehicles. Background technique [0002] Suspension is an important structural and functional part of the vehicle, which has a great influence on the overall performance of the vehicle. Vehicle suspension can be divided into passive suspension, semi-active suspension and active suspension according to its working principle. Passive suspension is mainly composed of springs, shock absorbers, etc. The shock absorber consumes and the spring buffers the vibration energy between the vehicle axle and the body mass to obtain the vibration reduction effect, but the fixed stiffness and damping are difficult to meet various vibration reduction requirements . Ordinary semi-active suspension is to transform the shock absorber with constant damping value of passive suspensio...

AI Technical Summary

Problems solved by technology

[0005] 1) The lead of the nut-ball screw mechanism is small and the efficiency is low

[0006] 2) Compared with the movement speed of the suspension, the dead zone range of the speed at which the damping force of the electromagnetic feed damping force generator is 0 is not reduced, which affects the improvement of the suspension performance

[0007] 3) Due to the use of a battery with a fixed voltage as the energy storage and power source, it is impossible to perform step-by-step control of variable voltage on the motor to obtain step-by-step adjustable energy-feed damping or energy-feed damping force

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