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Analysis on dynamic characteristics of braking pressure in air-braked ABS

HE Wei, LIU Zhao-du, QI Zhi-quan, WANG Bin(National Lab of Auto Performance & Emission Test, Beijing Institute of Technology, Beijing 100081,China)  
The mathematic model of the braking pressure characteristics is set up considering factors concerned such as the temperature and pipeline length based on the VABCO ABS. Through the test of pressure step response, the test of the frequency characteristics and PWM pressure modulation test, the dynamical properties of the braking pressure is analyzed, which proves the rationality of the mathematic model built and provides the theoretical basis for ABS control logics.
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