Ball screw type self-powered semi-active suspension actuator and its control method

Abstract

The invention discloses a ball screw type self-powered semi-active suspension actuator, which includes an actuator body and an actuator control system. The actuator body includes an upper casing, a lower casing, a screw shaft, a second A transmission shaft, a second transmission shaft, an output shaft, a brushless DC motor, a ball screw, a screw fixing nut, a screw shaft gear, a first gear of the first transmission shaft, a ratchet wheel of the first transmission shaft, a second gear of the first transmission shaft The second gear, the second transmission shaft gear, the first gear of the output shaft, the second gear of the output shaft, the screw nut and the cross connector; the actuator control system includes the actuator controller, computer, vehicle speed sensor, road surface roughness Displacement sensor, unsprung mass displacement sensor, sprung mass displacement sensor and actuator speed sensor; the invention also discloses a control method of a ball screw type self-powered semi-active suspension actuator. The invention avoids a lot of inertia loss, improves energy feeding efficiency, and has high working stability and reliability.

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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