Model-based active control method for vibration of automobile engine by combining feedforward with feedback

Abstract

The invention discloses a model-based active control method for vibration of an automobile engine by combining feedforward with feedback, which comprises the following steps of: establishing a control model of a system consisting of functional parts such as a power assembly and a suspension, designing a feedforward control algorithm to construct a feedforward control module, introducing a feedback control algorithm to construct a feedback control module, inputting a reference signal related to vibration of an automobile engine into a feedforward control module to calculate to obtain voltage, and inputting force acquired by a force sensor into a feedback control module to calculate to obtain compensation voltage after data optimization processing; processing the two voltages to obtain feedback corrected output voltage, and processing the output voltage and then applying to the suspension actuator to generate actuating force and engine exciting force to offset engine vibration. The method has the beneficial effects of less hardware resource occupation, no need of carrying out model identification through a large number of tests, strong robustness, capability of adapting to different rotating speed working conditions of the vehicle, capability of better avoiding road surface working condition interference and the like.

Description

technical field [0001] The invention relates to the technical field of automobile engine vibration control, in particular to a model-based active control method for automobile engine vibration with feed-forward and feedback. Background technique [0002] In modern automotive technology, the comfort of passenger cars is an important performance evaluation index. An important factor affecting the comfort of passenger cars is vehicle vibration. There are many reasons for the vibration of passenger cars during operation. The vibration caused by the operation of the automobile engine is one of the main reasons that cannot be ignored. The engine vibration is mainly caused by the reciprocating motion of the piston-crank linkage mechanism in the engine cylinder. The vibration is transmitted to the frame through the engine suspension system, and then transmitted to the cab, affecting the ride comfort. [0003] In order to improve the comfort of passenger cars, it is necessary to ra...

AI Technical Summary

Problems solved by technology

However, these traditional passive mounts have some unavoidable shortcomings: for example, due to the influence of their own materials, rubber mounts have poor high and low temperature resistance and are not resistant to oil, so they have poor adaptability to working conditions and low stability; for example The hydraulic mount will experience dynamic hardening when dealing with high-frequency vibrations, resulting in failure of vibration reduction

This method does not clearly describe how to solve multiple active suspension coupling solutions, and requires a large amount of data to establish tables, which is time-consuming and expensive

[0006] To sum up, there is still a lack of a hardware resource that occupies less hardware resources, considers the coupling of multiple active mounts, does not require a large number of tests for model identification, and can adapt to various working conditions of the engine at various speeds at the same time. An active control method for automotive engine vibration that can better avoid road surface disturbances and improve defects caused by modeling errors

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