Research of Large Bus Electric Power Steering System Based on Fuzzy Control
[1]CAO Yan-ling,LIANG Fa-ming,LIU Meng-nan,et al.Research of Large Bus Electric Power Steering System Based on Fuzzy Control[J].Journal of Zhengzhou University (Engineering Science),2015,36(03):64-67.[doi:10.3969/j.issn.1671 -6833.2015.03.014]
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Journal of Zhengzhou University (Engineering Science)[ISSN
1671-6833/CN
41-1339/T] Volume:
36
Number of periods:
2015 03
Page number:
64-67
Column:
Public date:
2015-06-30
- Title:
- Research of Large Bus Electric Power Steering System Based on Fuzzy Control
- CLC:
- U461.3
- DOI:
- 10.3969/j.issn.1671 -6833.2015.03.014
- Abstract:
- In view of the bus electric power steering (EPS) controller based on the steering torque and speedexpert system or look-up table is used to produce control signal,which can not effectively reflect the currentsituation of the axle load and its adaptive performance is poor.Based on fuzzy algorithm principle,this studydesigned a control method of circulating ball type EPS which is suitable for bus.Through the establishment ofthe EPS system dynamics models,this paper shows the control principle of the servo system;through the upperand lower control strategy research of the assist motor current,system control scheme is determined in whichcoefficient k is decided by associating load and speed;based on MATLAB Fuzzy logic toobox Fuzzy controlleris established.The relevant rules completely cover the original control area and the coefficient h follows thechange of load reflect well.The simulation based on ADAMS shows that when load changes from no load to fullload at 35 km/ h,the driver’s steering force reduced by 65% and the largest steering force decreased by 5 Ncompared to the original control system. Servo torque effectively reflecting the load change and the steering per-formance tuns good.
- References:
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