Indirect measurement technology of new energy vehicles' braking force under dynamic braking conditions

• 来源期刊: 先进制造进展（英文版）
• 关键词: Braking force Indirect measurement technology Vehicles Dynamic braking condition Electromagnetic interference (EMI) test
• 年，卷（期）: 2019,（4）
• 页码范围: 389-400
• 页数: 12页
• 语种: 英文

摘要

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.