A barrier Lyapunov function (BLF) based approach for antiskid traction/braking control of high speed trains

2014 ◽  
Author(s):  
Wanqing Yang ◽  
Wenchuan Cai ◽  
Yongduan Song
Keyword(s):  
Lyapunov Function ◽  
High Speed ◽  
Barrier Lyapunov Function ◽  
High Speed Trains ◽  
Braking Control

scholarly journals Prescribed Performance Active Braking Control with Reference Adaptation for High-Speed Trains

Actuators ◽  
2021 ◽  
Vol 10 (12) ◽  
pp. 313
Author(s):  
Rui Zhang ◽  
Jun Peng ◽  
Bin Chen ◽  
Kai Gao ◽  
Yingze Yang ◽  
...  
Keyword(s):  
Steady State ◽  
Feedback Linearization ◽  
High Speed ◽  
Adhesion Force ◽  
Unscented Kalman Filter ◽  
Nonlinear Function ◽  
Slip Ratio ◽  
Prescribed Performance ◽  
High Speed Trains ◽  
Braking Control

Active braking control systems are vital for the safety of high-speed trains by leading the train operation at its maximum adhesion state. The train adhesion is a nonlinear function of the slip ratio and varies with the uncertain wheel-rail contact conditions. A nonlinear active braking control with rapid and accurate tracking performance is highly required for train braking systems. This paper proposes a novel prescribed performance active braking control with reference adaptation to obtain the maximum adhesion force. The developed feedback linearization controller employs a prescribed performance function that specifies the convergence rate, steady-state error, and maximum overshoot to ensure the transient and steady-state control performance. Furthermore, in the designed control approach, a continuous-time unscented Kalman filter is introduced to estimate the uncertainty of wheel-rail adhesion. The estimation is utilized to represent uncertainty and compensate for the prescribed performance control law. Finally, based on the estimated wheel-rail adhesion, an on-line optimal slip ratio generation algorithm is proposed for the adaptation of the reference wheel slip. The stability of the system is provided, and experiment results validate the effectiveness of the proposed method.

scholarly journals Observer Based Traction/Braking Control Design for High Speed Trains Considering Adhesion Nonlinearity

2014 ◽  
Vol 2014 ◽  
pp. 1-10 ◽  
Author(s):  
Wenchuan Cai ◽  
Wenhao Liao ◽  
Danyong Li ◽  
Yongduan Song
Keyword(s):  
High Speed ◽  
Adhesion Force ◽  
Surface Condition ◽  
Control Design ◽  
Work Force ◽  
High Speed Trains ◽  
Train Operation ◽  
Braking Control ◽  
Key Enabling Technologies ◽  
Automatic Train Operation

Train traction/braking control, one of the key enabling technologies for automatic train operation, literally takes its action through adhesion force. However, adhesion coefficient of high speed train (HST) is uncertain in general because it varies with wheel-rail surface condition and running speed; thus, it is extremely difficult to be measured, which makes traction/braking control design and implementation of HSTs greatly challenging. In this work, force observers are applied to estimate the adhesion force or/and the resistance, based on which simple traction/braking control schemes are established under the consideration of actual wheel-rail adhesion condition. It is shown that the proposed controllers have simple structure and can be easily implemented from real applications. Numerical simulation also validates the effectiveness of the proposed control scheme.

Adaptive slip ratio estimation for active braking control of high-speed trains

2020 ◽  
Author(s):  
Bin Chen ◽  
Zhiwu Huang ◽  
Rui Zhang ◽  
Fu Jiang ◽  
Weirong Liu ◽  
...  
Keyword(s):  
High Speed ◽  
Ratio Estimation ◽  
Slip Ratio ◽  
High Speed Trains ◽  
Braking Control

Investigation into the braking performance of high-speed trains in the complex braking environment of the Sichuan-Tibet Railway

2021 ◽  
pp. 095440972110418
Author(s):  
Wentao Zhao ◽  
Jianming Ding ◽  
Qingsong Zhang ◽  
Weiwei Liu
Keyword(s):  
Parallel Computation ◽  
Dynamic Model ◽  
Control Strategy ◽  
High Speed ◽  
Spatial Dynamics ◽  
Dynamics Model ◽  
Braking Performance ◽  
High Speed Trains ◽  
Braking Control ◽  
Different Altitudes

The Sichuan-Tibet Railway is an east-west rapid plateau railway under construction from Chengdu to Lhasa. One of its most remarkable features is the high altitude and notable altitude fluctuations. High altitudes will result in low atmospheric pressures and temperatures. The freezing caused by low temperatures will lead to low wheel-rail adhesions. Altitude fluctuations will generate complex spatial railway tracks. To investigate the braking performance of a train in such a complex braking environment, a train spatial dynamics model, a model of a direct pneumatic brake system and a model of a braking control strategy are constructed. A comprehensive analysis model for investigating the braking performance of high-speed trains in a complex braking environment is proposed based on the constructed train spatial dynamics model, direct pneumatic brake system model and braking control strategy model. A simulation computation platform for train braking performance analysis on the Sichuan-Tibet Railway is established based on SIMPACK, AMESim, Simulink and their interfaces. The braking performance under the different altitudes, different spatial railway tracks and low adhesions are analysed in detail and summarized. Computation time are compared in different altitudes and track conditions. Computational efficiencies of the dynamic model with multi-thread parallel computation are discussed. The results indicate that an increasing altitude and the alteration of railway track conditions have a remarkable influence on the braking distance, brake cylinder pressure, instantaneous deceleration, maximum wheel-load reduction rates and maximum longitudinal impact forces of high-speed trains. The track conditions in the dynamic model have a greater impact on the computation speed. Compared to single-thread parallel computation, the computational efficiency using 2-thread parallel computation can be promoted by 22.97%. These results will provide a reference for the Sichuan-Tibet Railway design and the optimization of train braking systems.

Battery Self-Traction System for High-Speed Trains

2020 ◽  
Vol 140 (5) ◽  
pp. 349-355
Author(s):  
Hirokazu Kato ◽  
Kenji Sato
Keyword(s):  
High Speed ◽  
High Speed Trains ◽  
Traction System
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