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Train pneumatic brakes are part of a train safety system, and are thus critical components. This paper illustrates how modeling can be applied to efficiently design such system, from requirement definition to HIL testing. The valves modeling is discussed along with the system level model. Moreover, in order to study the wheel-slide protection device, a model of the wheel-rail interface has been developed. The contact model, written in Modelica, has been validated against measurement for different conditions of contact (dry, wet…). The model is fully parametric and allows testing of various adherences. Finally, the resulting system composed of pneumatic valves, wheel-rail interface and rolling-stock is exported through c-code for integration into a HIL system, providing an efficient test platform for the electronic Brake Control Unit. High speed train; braking ; adherence; pneumatic

High-speed train pneumatic braking system with wheel-slide protection device : A modelling application from system design to HIL testing