国内abs发展现状（The development status of domestic ABS）.docVIP

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国内abs发展现状（The development status of domestic ABS）.doc

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国内abs发展现状（The development status of domestic ABS）

国内abs发展现状（The development status of domestic ABS） The development status of domestic ABS About from the beginning of 1960s, the progress of electronic technology has become the biggest power of the development of automobile industry. The control system of modern cars almost entirely by the electronic control device, play a significant role in improving economic performance, power, reliability, comfort and emission control system. Therefore, the application proportion of electronic product in the automobile, has become an important basis for the evaluation of its quality, performance index. Antilock braking system (ABS) is the automotive electronic products focus on the development of the national fifteen plan, the main function of it is in emergency braking, prevent wheel lock, improve the stability and controllability of the direction of emergency braking, shorten the braking distance, prolong the service life of the tyre. Antilock braking system (ABS) is a kind of nonlinear control system, the biggest difficulty of this technology lies in the characteristics of nonlinear and parameter control is difficult to accurately measure the. Because of the expensive measuring devices installed on the aircraft, and the aircraft in the single airport pavement landing, so the performance of anti lock braking system installed on the aircraft is very stable; on the contrary, the measuring wheel speed sensor installed only on the car, the speed sensor is not installed, and the vehicle road is complex. So, compared with the aircraft antilock braking system, vehicle braking control is very difficult, not easy to achieve the ideal effect. 1 ABS control principle During braking, between vehicle speed and wheel speed are speed difference is a slip phenomenon between the wheel and the ground, with slip slip degree (driving process known as slip rate, slip rate and slip rate are collectively known as the sliding rate): S=[(Vv-Vw) / Vv] * 100% type S - Vv - slip rate; speed; Vw wheel spe