Active suspension FxLMS self-adaption control method based on acceleration signal feedback

Abstract

The invention relates to an active suspension FxLMS self-adaption control method based on acceleration signal feedback.Active suspension control methods comprises the FxLMS self-adaption control method based on force feedback, a reference signal estimation method based on engine speed and a force feedback to acceleration feedback expansion method, wherein the FxLMS self-adaption control method based on force feedback comprises active suspension voltage to force secondary channel estimation and an LMS self-adapting filter.According to the force feedback to acceleration feedback expansion method, suspending vehicle body acceleration admittance phase angle frequency changing characteristics are adopted as reference, a secondary channel estimation model is expanded from force to acceleration, and acceleration of the passive side of an active suspension substitutes force transmitted to a vehicle body to serve as an error signal of a controller, so that acceleration feedback of the control method is achieved.According to the active suspension control method, engine speed and acceleration of the passive side of the active suspension are taken as input, processing is conducted through a control system, a proper voltage control signal is output, and the voltage signal is subjected to power amplification and then drives an actuator in the active suspension to actuate, so that vibration from an engine is counteracted.

Description

Technical field [0001] The invention relates to an FxLMS adaptive control method for active suspension based on acceleration signal feedback, and belongs to the field of active suspension of automobile powertrains. Background technique [0002] Nowadays, people have higher and higher requirements for car ride comfort, so NVH (Noise, Vibration and Harshness) characteristics have become an important criterion for measuring car quality. However, considering the need to improve fuel economy, automobiles are now moving in the direction of lighter weight. The reduction in the quality of the vehicle will adversely affect the NVH characteristics of the vehicle. It is also for the purpose of improving fuel economy. For example, high-end cars such as the Audi S8 adopt engine closed-cylinder technology. While the closed-cylinder technology increases the diversity of vibration orders, it exacerbates the problem of uneven engine vibration. In addition, in recent years, the development of hy...

AI Technical Summary

Problems solved by technology

The reduction of vehicle quality will adversely affect the NVH characteristics of the vehicle

It is also for the purpose of improving fuel economy, such as the Audi S8 and other high-end cars, which adopt engine cylinder deactivation technology, while deactivation technology increases the diversity of vibration orders, and at the same time aggravates the vibration problem of uneven force on the engine

In addition, the development of hybrid vehicles has become more and more rapid in recent years, and the vibration and noise problems caused by the instantaneous intervention of the engine under the rapid acceleration condition have seriously affected the ride comfort

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