基于台架试验的高速动车组防滑控制特性研究

Research on Anti-slide Control Characteristics of High-speed Train Based on Test Bench

黏着制动是通过车轮与钢轨接触斑之间的黏着-蠕滑来传递制动力的,因此轮轨黏着是影响制动系统性能的主要因素。防滑控制系统能防止由于轮轨低黏着而引起的轮对擦伤,是列车制动系统的核心技术之一。在深入分析轮轨黏着机理的基础上,设计一种分层递阶和多模式黏着切换的防滑控制新策略,防滑控制系统能根据不同的轮轨黏着条件自适应获得最佳可用黏着。基于高速轮轨关系试验台,进行不同速度等级不同轮轨黏着条件下的防滑试验,探析防滑控制特性和黏着-蠕滑特性。试验结果表明:防滑控制系统既可以抑制轮对滑行防止擦伤,又能够改善轮轨可用黏着,缩短了制动距离,验证了防滑控制系统的有效性和可靠性,为自主化防滑系统今后的推广应用奠定了技术支持和理论基础。

As adhesion braking transmits the braking force through the adhesion-creep in the contact spot between the wheel and the rail,the wheel-rail adhesion is the main factor that affects the performance of the braking system.The anti-slide control system,as one of the core technologies of the train braking system,can prevent the wheel-set from being scratched due to the low adhesion between wheel and rail.Based on the in-depth analysis of the wheel-rail adhesion mechanism,an innovative anti-slide control strategy for layered hierarchical and multi-mode adhesion switch over was proposed and the anti-slide control system can adaptively obtain the optimal adhesion according to different wheel-rail adhesion conditions.The anti-slide tests under different wheel-rail adhesion conditions and different speed levels were implemented on the high-speed wheel-rail relationship test bench,to explore the characteristics of anti-slide control and adhesion-creep.The test results show that the anti-slide control system can not only inhibit the wheel-slide to prevent wheel scratches,but also optimize the available wheel-rail adhesion and shorten the braking distance.Therefore,the validity and reliability of the anti-slide control system are verified,which provides the basic theory and technical support for the future promotion and application of the independently developed anti-slide control system.