Ball screw type self-energized semi-active suspension actuator and control method thereof

Abstract

The invention discloses a ball screw type self-energized semi-active suspension actuator. The ball screw type self-energized semi-active suspension actuator comprises an actuator body and an actuatorcontrol system. The actuator body comprises an upper shell, a lower shell, a lead screw shaft, a first transmission shaft, a second transmission shaft, an output shaft, a direct current brushless motor, a ball screw, a lead screw fixing nut, a lead screw shaft gear, a first transmission shaft first gear, a first transmission shaft ratchet wheel, a first transmission shaft second gear, a second transmission shaft gear, an output shaft first gear, an output shaft second gear, a lead screw nut and a cross-shaped connector. The actuator control system comprises an actuator controller, a computer,a vehicle speed sensor, a road surface unevenness displacement sensor, an unsprung mass displacement sensor, a sprung mass displacement sensor and an actuator speed sensor. The invention further discloses a control method of the ball screw type self-energized semi-active suspension actuator. By adopting the ball screw type self-energized semi-active suspension actuator, a large amount of inertia loss is avoided, the energy feedback efficiency is improved, and the working stability and the reliability are high.

Description

technical field [0001] The invention belongs to the technical field of automobile suspension systems, and in particular relates to a ball screw type self-powered semi-active suspension actuator and a control method thereof. Background technique [0002] During the driving process of the vehicle, the relative displacement between the sprung mass and the unsprung mass of the vehicle will be caused due to the unevenness of the road surface, which will cause the vehicle to vibrate. The suspension system is a key component that determines the dynamic performance of the vehicle, and it determines the ride comfort and ride comfort of the vehicle. Due to the fixed parameters such as stiffness and damping of the traditional passive suspension, the vibration reduction effect of the car is greatly limited, and the suspension vibration reduction performance cannot be changed in time with the change of the road surface excitation. The semi-active suspension can change the stiffness or da...

AI Technical Summary

Problems solved by technology

However, the ordinary ball screw structure in the prior art will cause the generator to rotate forward and reverse continuously, which will not only cause a large amount of inertia loss, the system energy feeding efficiency will be low, but also the service life of the generator will be shortened, and the system reliability will be poor

For example, the ball screw type shock absorber involved in the "ball screw type inerter with mechanically variable inertial capacity coefficient" disclosed in the Chinese invention patent with the application number of 201410650452.4 mainly uses a mechanical structure to slow down the instantaneous vibration of the road surface. Impact, but once processed and manufactured, its various parameters are determined, and the parameters cannot be adjusted according to different road conditions and different models, and there are certain limitations

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