【摘 要】
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Currently,direct braking-force measurement under dynamic conditions requires a considerable modifi-cation to the vehicles and has poor compatibility because the
【机 构】
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School of Mechanical and Automotive Engineering,South China University of Technology,Guangzhou 51064
论文部分内容阅读
Currently,direct braking-force measurement under dynamic conditions requires a considerable modifi-cation to the vehicles and has poor compatibility because there are many types of vehicles.Thus,in this paper,an indirect measurement method of new-energy vehicles’ braking force under dynamic braking conditions is pro-posed.The mechanical wheel and axle model at low/idling/high speeds is established using the piston-pressure for-mula,force transfer in the brake-wheel cylinder,relative movement between the wheel and the roller,among others.On this basis,the relationship between wheel braking force and roller-linear acceleration is further derived.Our method does not alter existing vehicle structures or sensor types.The standard sealing bolt is temporarily replaced with a hydraulic sensor for coefficient calibration.After-ward,the braking force can be indirectly calculated using the roller-linear velocity data.The method has character-istics of efficiency and high accuracy without refitting vehicles.
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