Modeling the Pneumatic Subsystem of an S-cam Air Brake System

Abstract

This paper deals with the development of a fault-free model of the pneumatic subsystem of an air brake system that is used in commercial vehicles. Our objective is to use this model in brake control and diagnostic applications. The development of a diagnostic system would be useful in automating enforcement inspections and also in monitoring the condition of the brake system in real-time. This paper presents a detailed description of the development of this model and of the experimental setup used to corroborate this model for various realistic test runs.

Pneumatic Brake Control for Precision Stopping of Heavy-Duty Vehicles

“…The ability to remain "dual use" is one of the common requirement preferences for the early automation deployment requirements. Relevant work on the pneumatic brake in literature focuses mainly in the areas of ABS [12], [15] and fault diagnosis [16]. A comprehensible brake model was developed for diagnosis purposes in [16], however it was too complex for control design.…”

Modeling and simulation of pneumatic brake system used in heavy commercial vehicle

“…The foundation brake is the one which converts the actuation force from the actuator into braking torque and stops the vehicle [8]. In India most of the heavy commercial vehicles use drum brakes, which nowadays were being replaced by disc brakes.…”

Pressure control scheme for air brakes in commercial vehicles

“…The controller has been developed based on the mathematical model of the treadle valve derived in [14]. For the sake of completeness, this model is provided in this chapter following a discussion of how it works.…”

“…This scheme can be used to control the amount of braking required during both normal and emergency brake applications. A model for the pressure transients that relates the brake chamber pressure to the treadle valve plunger displacement and the supply pressure to the treadle valve has been presented in [14]. The controller developed based on this model of the treadle valve regulates the brake chamber pressure by controlling the motion of the treadle valve plunger.…”