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Energies 2017, 10(2), 220;

Robust Clamping Force Control of an Electro-Mechanical Brake System for Application to Commercial City Buses

Graduate School of Mechanical Engineering, Yeungnam University, Gyeongsan-si, Gyensangbuk-do 38541, Korea
Advanced Development Team, Sangsin Brake Co., Ltd., Dalsung-gun, Daegu Metropolitan City 43023, Korea
Author to whom correspondence should be addressed.
Academic Editor: Felipe Jimenez
Received: 15 December 2016 / Revised: 1 February 2017 / Accepted: 7 February 2017 / Published: 14 February 2017
(This article belongs to the Special Issue Methods to Improve Energy Use in Road Vehicles)
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This paper proposes a sensor-less robust force control method for improving the control performance of an electro-mechanical brake (EMB) which is applicable to commercial city buses. The EMB generates the accurate clamping force commanded by a driver through an independent motor control at each wheel instead of using existing mechanical components. In general, an EMB undergoes parameter variation and a backdrivability problem. For this reason, the cascade control strategy (e.g., force-position cascade control structure) is proposed and the disturbance observer is employed to enhance control robustness against model variations. Additionally, this paper proposed the clamping force estimation method for a sensor-less control, i.e., the clamping force observer (CFO). Finally, in order to confirm the performance and effectiveness of a proposed robust control method, several experiments are performed and analyzed. View Full-Text
Keywords: electro-mechanical brake; disturbance observer; clamping force control electro-mechanical brake; disturbance observer; clamping force control

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Eum, S.; Choi, J.; Park, S.-S.; Yoo, C.; Nam, K. Robust Clamping Force Control of an Electro-Mechanical Brake System for Application to Commercial City Buses. Energies 2017, 10, 220.

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