| Summary: | [Objective] Anti-skid protection control technology is a crucial technology for urban rail transit. The control objective is to match the actual wheel-rail adhesion force by reducing braking force, thereby minimizing or preventing wheel tread abrasion. Therefore, it is necessary to analyze and study anti-skid protection control technology for urban rail transit vehicles based on their specific characteristics. [Method] Starting from the principles of anti-skid protection control, the theory of wheel-rail adhesion for urban rail transit vehicles is elucidated. The control principles of electric braking anti-skid, pneumatic braking anti-skid, and electric-pneumatic hybrid braking for urban rail transit vehicles are introduced, as well as situations involving wheel axle locking. [Result & Conclusion] The traction system electric braking anti-skid and the air braking system pneumatic braking anti-skid both utilize coasting ratio and deceleration as criteria for slide detection. Adjusting the braking force achieves maximum utilization of wheel-rail adhesion, minimizing occurrences of wheel locking and wheel tread abrasion. Regarding anti-skid control in electric-pneumatic hybrid braking, it is essential to adopt a rational anti-skid control interface scheme based on the characteristics of different systems and variations in skid criteria, thus ensuring the correct coordination of anti-skid functions between systems.
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