Control method for damping value of electronic control air spring damping apparatus with three-gear

Abstract

The invention discloses a control method for the damping value of an electronic-control air suspension fork three-grade adjustable absorber, wherein, according to the simulation analysis of the ride comfort, the suspension fork dynamic deflection and the dynamic load are used as the limit condition, the genetic-algorithm optimization program is compiled, and then the influences of the sprung mass, vehicle speed, and road surface on the damping value optimization are respectively analyzed, so that the sprung mass and the vehicle speed are determined as the main factors for influencing the damping value optimization; according to the real run condition of the vehicle, the change of the sprung mass is divided into three sections: no-load to half-load, half-load to 3 / 4 full-load, and 3 / 4 full-load to full-load; during the sprung mass change of each section, the different mass and the different vehicle-speed as the influence factors are taken into the consideration; the damping value of each grade is pre-optimized by the genetic algorithm and then the damping value is memorized in the ROM of a suspension fork control system ECU; ECU makes use of the signals sent by a sensor to judge the real-time run condition so as to control the executing mechanism to make a response to select the corresponding damping value.

Description

technical field [0001] The invention relates to the technical field of automobile vibration reduction control, in particular to a control method for an automobile's third-speed damping adjustable semi-active air suspension. Background technique [0002] With the improvement of people's requirements for vehicle ride comfort and the development of suspension technology, the application of air suspension on vehicles is becoming more and more extensive. With the promotion of electronic system applications and the development of vehicle control technology, electronic control gradually replaces traditional It is foreseeable that the application of electronically controlled air suspension systems in automobiles will become more and more popular, and the research on its control methods will become the key. [0003] The electronically controlled air suspension with adjustable damping is a kind of semi-active suspension. Over the years, scholars from various countries have done a lot ...

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Problems solved by technology

[0005] The disadvantages of the above three patents are: although the damping can be adjusted in real time to improve the performance of the vehicle, the damping of the shock absorber is required to change quickly, generally above 20Hz, which makes the actual production of the shock absorber difficult and reliable. poor sex

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