27 April 2011 Pressure tracking control of vehicle ABS using piezo valve modulator
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Abstract
This paper presents a wheel slip control for the ABS(anti-lock brake system) of a passenger vehicle using a controllable piezo valve modulator. The ABS is designed to optimize for braking effectiveness and good steerability. As a first step, the principal design parameters of the piezo valve and pressure modulator are appropriately determined by considering the braking pressure variation during the ABS operation. The proposed piezo valve consists of a flapper, pneumatic circuit and a piezostack actuator. In order to get wide control range of the pressure, the pressure modulator is desired. The modulator consists of a dual-type cylinder filled with different substances (fluid and gas) and a piston rod moving vertical axis to transmit the force. Subsequently, a quarter car wheel slip model is formulated and integrated with the governing equation of the piezo valve modulator. A sliding mode controller to achieve the desired slip rate is then designed and implemented. Braking control performances such as brake pressure and slip rate are evaluated via computer simulations.
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Juncheol Jeon, Seung-Bok Choi, "Pressure tracking control of vehicle ABS using piezo valve modulator", Proc. SPIE 7977, Active and Passive Smart Structures and Integrated Systems 2011, 79771V (27 April 2011); doi: 10.1117/12.880378; https://doi.org/10.1117/12.880378
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KEYWORDS
Modulators

Actuators

Control systems

Picosecond phenomena

Roads

Shape memory alloys

Vehicle control

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