SS_3型机车制动电阻故障分析及防治措施

详细分析了SS3型机车制动电阻故障的现象及其原因,并提出了相应的防治措施,降低了机车制动电阻故障率,保证了机车的安全运行。     

旋转型永磁涡流制动装置

介绍了日本铁道综合技术研究所研制成功的旋转型永磁涡流制动装置工作原理、概况 ,以及各种试验的结果 ,指出该制动装置可以实用化     

Sliding mode observers for vehicle mode detection

This paper explores the use of sliding mode observers to detect the onset of potentially dangerous vehicle modes such as oversteer, understeer or split-μ braking. Provided these modes can be detected quickly enough, existing stability controllers can be engaged to ensure safe performance of the vehicle. It is shown that the equivalent output error injection signals associated with the sliding mode observer have distinctive signatures depending on the particular mode encountered. Appropriate thresholds on these signals can be set so the scheme ignores variations which arise during normal driving, but can detect and isolate different undesirable vehicle modes within 0.3 seconds of their onset.     

解决提速客车制动盘热裂的对策

分析了提速客车制动盘热裂原因和解决对策，适当改变制动机的设计参数，有利于解决制动盘热裂。     

基于虚拟仪器的内燃机车微机控制系统检测装置

为了保证内燃机车微机控制系统的控制性能，提出采用基于虚拟仪器的检测装置。详细描述了该装置的硬件构成和软件实现方法。运行表明，装置的工作状况良好。     

"中华之星"动车组拖车制动系统简介

介绍了“中华之星”动车组拖车制动系统的主要技术特点、组成和作用原理。     

270 km/h等级高速动力车转向架关键部件——驱动制动单元的设计

介绍了研制270km/h动力车的背景,对驱动制动单元的成因、组成、相互关系及纵向、垂向、横向悬挂和定位作了说明.此外,还探讨了基础制动的有关问题.     

踏面制动单元弹簧停车制动器作用原理简介

对我国及德国生产的踏面制动单元弹簧停车制动器的作用原理进行了介绍。     

Rollover detection and control on the non-driven axles of trucks based on pulsed braking excitation

The major challenges for rollover detection are the accurate modelling of vehicle dynamics and the real-time estimation of the varied parameters. To circumvent the dependence on vehicle parameters, a novel rollover detection method based on the pulsed braking excitation is proposed. With the lateral load transfer ratio (LTR), the relationship between rollover risks and non-driven wheel rotational dynamics is deduced, which is the basis to apply braking excitation on wheels. The lateral acceleration is adopted as the first criterion to activate the rollover detection. Once the pulsed braking is applied to the non-driven wheels, the braking pressure and wheel angular speeds are measured to estimate the LTR on the non-driven axle. In case of emergency, the differential braking-based anti-rollover is implemented. Experiments were conducted on a Hardware-in-Loop bench. The results show that, the pulsed braking can be activated timely, and the LTR on the non-driven axle is estimated accurately. With the anti-rollover control, the roll stability is improved considerably.     

Optimisation of active suspension control inputs for improved performance of active safety systems

A collocation-type control variable optimisation method is used to investigate the extent to which the fully active suspension (FAS) can be applied to improve the vehicle electronic stability control (ESC) performance and reduce the braking distance. First, the optimisation approach is applied to the scenario of vehicle stabilisation during the sine-with-dwell manoeuvre. The results are used to provide insights into different FAS control mechanisms for vehicle performance improvements related to responsiveness and yaw rate error reduction indices. The FAS control performance is compared to performances of the standard ESC system, optimal active brake system and combined FAS and ESC configuration. Second, the optimisation approach is employed to the task of FAS-based braking distance reduction for straight-line vehicle motion. Here, the scenarios of uniform and longitudinally or laterally non-uniform tyre–road friction coefficient are considered. The influences of limited anti-lock braking system (ABS) actuator bandwidth and limit-cycle ABS behaviour are also analysed. The optimisation results indicate that the FAS can provide competitive stabilisation performance and improved agility when compared to the ESC system, and that it can reduce the braking distance by up to 5% for distinctively non-uniform friction conditions.