Vehicle suspension control system and method based on virtual inertia capacity

Abstract

The invention discloses a vehicle suspension control system and method based on virtual inertia capacity. Acceleration signals as and ab at the two endpoints of a virtual inertia capacity generator are collected in real time through an acceleration sensor and transmitted to a control unit, and a virtual inertia capacity optimization module conducts solution on the basic value b of virtual inertia capacity according to the optimizing strategy of suspension system performance and inputs the result to the control unit; the control unit works out the virtual inertia force (target control force) F according to the kinetic equation F=b*(as-ab) of an inertia container and transmits the virtual inertia force to the virtual inertia capacity generator for generating actual action force, and the purpose that the virtual inertia capacity generator is utilized to replace a mechanical inertia container device is achieved. By means of the vehicle suspension control system and method, the difficult problem that the inertia container device is greatly affected by nonlinear factors in engineering application is solved, the defect of quality impedance loss of an active or semi-active suspension is overcome, fault tolerance is good, performance is stable, the basic value of the virtual inertia capacity can be flexibly matched and optimized according to changes of the driving work conditions and the evaluation indexes, and the application prospect is wide.

Description

technical field [0001] The invention relates to a vehicle suspension control method, in particular to a vehicle suspension control system and control method based on virtual inertial capacity. Background technique [0002] As a device that carries the body and transmits all forces between the wheels and the body, the performance of the automobile suspension directly affects the ride comfort and handling stability of the vehicle. [0003] In recent years, domestic and foreign scholars have made many attempts to break through the bottleneck problem of traditional passive suspension performance improvement. On the one hand, active and semi-active suspensions can control the stiffness or damping characteristics of the suspension in real time by adjusting the component parameters of the suspension, which has excellent actuation effect and superior performance; on the other hand, surrounding new mechanical vibration isolation components The vehicle 1SD (Inerter-Spring-Damper) sus...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is: in order to solve the problem that the inerter is greatly affected by nonlinear factors in engineering applications and cannot be practically applied, and the lack of quality impedance of the active and semi-active suspension control system, a virtual inerter based on virtual inerter is proposed. Vehicle suspension control method, using a virtual inertial force generator to replace the traditional inerter mechanical device, eliminating the influence of nonlinear factors of the inerter, and improving the impedance form of the suspension system at the same time

Images