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Retraction control of motorized seat belt system with linear state observer

Journal of Central South University 2013年第2期20卷 385-392页

作者： LEE Kang-seok CHOI Chin-chul LEE Woo-taik Department of Control and Instrumentation Engineering Changwon National University

A design and verification of linear state observers which estimate state information such as angular velocity and load torque for retraction control of the motorized seat belt (MSB) system were described. The motorized seat belt system provides functions to protect passengers and improve passenger's convenience. Each MSB function has its own required belt tension which is determined by the function's purpose. To realize the MSB functions, state information, such as seat belt winding velocity and seat belt tension are required. Using a linear state observer, the state information for MSB operations can be estimated without sensors. To design the linear state observer, the motorized seat belt system is analyzed and represented as a state space model which contains load torque as an augmented state. Based on the state space model, a linear state observer was designed and verified by experiments. Also, the retraction control of the MSB algorithm using linear state observer was designed and verified on the test bench. With the designed retraction control algorithm using the linear state observer, it is possible to realize various types of MSB functions.

关键词： motorized seat belt system motorized seat belt (MSB) system linear state observer state space model augmented state retraction control

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