dc.contributor.advisor RAJAGOPAL,K.R en_US dc.contributor.advisor SWAROOP, D.V.A.H.G en_US dc.creator Ramaratham, Srivatsan en_US dc.date.accessioned 2008-10-10T21:01:28Z dc.date.available 2008-10-10T21:01:28Z dc.date.created 2008-08 en_US dc.date.issued 2008-10-10 dc.identifier.uri http://hdl.handle.net/1969.1/86043 dc.description.abstract This thesis deals with the development of a mathematical model for an air brake en_US system in the presence of leaks. Brake systems in trucks are crucial for ensuring the safety of vehicles and passengers on the roadways. Most trucks in the US are equipped with S-cam drum brake systems and they are sensitive to maintenance. Brake defects such as leaks are a major cause of accidents involving trucks. Leaks in the air brake systems affect braking performance drastically by decreasing the peak braking pressures attained and also increasing the time required to attain the same, thereby resulting in longer stopping distances. Hence there is a need for detecting leaks in an air brake system. In this thesis, a mathematical model for an air brake system in the presence of leaks is developed with a view towards developing an automatic leak detection system in the near future. The model developed here builds on an earlier research at Texas A&M University in which a "fault free" model of an air brake system is developed, i.e., a mathematical model of an air brake system that predicts how the pressure in the brake chamber evolves as a function of the brake pedal input when there are no leaks in the air brake system.In order to develop a model for an air brake system in the presence of leaks, one must characterize a "leak". A leak may be characterized by the location and its size. Since the pipes are short, the location of the leak does not significantly affect the evolution in the brake pressure as much as its size. For this reason, "effective area" of the leak was chosen as a characteristic of the leak. It was estimated by fitting an empirical relation for leak with leak flow measurement data. The supply pressure and effective area of leak comprised the inputs to the model along with the displacement of the foot pedal (treadle valve plunger). The model was corroborated with the experimental data collected using the setup at Texas A&M University. dc.format.medium electronic en_US dc.language.iso en_US en_US dc.publisher Texas A&M University en_US dc.subject LEAKS en_US dc.subject BRAKES en_US dc.subject MATHEMATICAL MODEL en_US dc.subject AIR BRAKE SYSTEM en_US dc.subject TRUCKS en_US dc.title A mathematical model for air brake systems in the presence of leaks en_US dc.type Book en dc.type Thesis en thesis.degree.department Mechanical Engineering en_US thesis.degree.discipline Mechanical Engineering en_US thesis.degree.grantor Texas A&M University en_US thesis.degree.name Master of Science en_US thesis.degree.level Masters en_US dc.contributor.committeeMember WALTON, JAY ROBERT en_US dc.type.genre Electronic Thesis en_US dc.type.material text en_US dc.format.digitalOrigin born digital en_US
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