Improved skylight control algorithm for vehicle semi-active suspension system

Abstract

An improved algorithm for skylight control of a semi-active suspension system of a vehicle is provided. The algorithm includes the following steps: The acceleration sensor signal is first acquired andprocessed to obtain the sprung mass acceleration signal (img file= 'DDA000173614679000011. TIF' wi= '77' he= '63' / ) the sprung mass absolute velocity (img file= ' DDA0001736146790000012. TIF 'wi=' 79'he=' 63 ' / ) Unsprung mass speed (img file=' DDA00017361467900013. TIF 'wi=' 45 'he=' 55 ' / ) and the relative speeds of the sprung and unsprung masses (img file=' DDA00017361467900014. TIF 'wi=' 191'he=' 55 ' / ) are then calculated by the ECU controller (img file=' DD A0001736146790000015. TIF 'wi=' 262 'he=' 65 ' / ) wherein, When (img file= 'DDA0001736146790000016. TIF' wi= '317' he= '64' / ), thedamping coefficient Cmin of the output magnetorheological damper. ; When (img file= 'DDA00017361467900017. TIF' wi= '316' he= '64' / ), The ECU controller performs the next data calculation (img file= 'DDA000173614679000018. TIF' wi= '142' he= '56' / ) when (img file= 'DDA0001736146790000 019. TIF 'wi=' 195 'he=' 57 ' / ), the maximum damping coefficient Cmax is selected; When (img file= 'DDA0001736146700000110. TIF' wi= '195' he= '57' / ), the relative damping coefficient Cmid obtained by particle swarm optimization is selected. On the basis of the traditional skyhook control algorithm, the inventionfurther considers the influence relationship between the vehicle speed and the acceleration, and effectively improves the ride comfort on the premise of guaranteeing driving safety and stability. Theimproved control algorithm of the invention is simple and easy to operate, has good real-time performance and high stability, and is suitable for wide application.

Description

technical field [0001] The invention relates to ceiling control of a semi-active suspension system of a vehicle, in particular to an improved algorithm for ceiling damping control of a semi-active suspension system of a vehicle. Background technique [0002] The suspension system is an important part of the vehicle, which has a great influence on the ride comfort and handling stability of the vehicle. However, the fixed parameters of the traditional passive suspension system are difficult to meet the performance requirements of the above two aspects; moreover, although the active suspension system can achieve a satisfactory control effect, it is expensive and consumes a lot of energy. The semi-active suspension system can overcome the above-mentioned shortcomings of the active suspension system, and has a simple structure, and can obtain the effect of approximate active control to a certain extent. Therefore, the controllable semi-active suspension system with variable stif...

AI Technical Summary

Problems solved by technology

The ceiling damping control can effectively improve the vibration isolation performance of the vehicle body and improve the ride comfort of the vehicle, but at the same time, it will have a negative impact on the vibration isolation performance of the wheels, thereby affecting the driving safety

Furthermore, the ceiling damping control is realized by suppressing the vertical velocity of the vehicle body. Since the influence relationship between the vehicle body speed and acceleration is not considered, the vertical acceleration of the vehicle body cannot be effectively reduced, so it still plays an important role in improving the ride comfort. limited

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