Simulation Of Noise Of Diesel Engine Based On MATLAB

With the development of economy and modernization ,research on yawp of internal combustion become more and more important which helps not only to improve people's life level but also to give reference to fault diagnosis for internal combustion. On other hand ,it is useful in improvement of military equipment. Modeling of yawp of turbo-super charged diesel is accomplished based on MATLAB software whose content is given as follows.Equipment and methods of yawp signal acquisition are summarized, and analytic methods of yawp signal are also given. it describes the traits of various kinds of engine model, the advantage and disadvantage are compared together. At the same time, it has also introduced the exploitation platform MATLAB and some toolboxes.System of yawp signal acquisition and analysis is established based on MATLAB, which is composed of soundcard as hardware and control program programmed by my self. The system can realize analysis in frequency domain including spectrum,power spectrum analysis and filtering.Model of turbo-supercharged diesel is described in detail which include five subsystems, they are compressor subsystem, cooler subsystem, turbine subsystem, diesel subsystem, turbine dynamic and diesel dynamic subsystem. The model emphasizes the time development of the time averaged mean values of the engine states rather than their instantaneous values and then problems accounted during modeling are also discussed.Finally, system of yawp signal acquisition and analysis and model of turbo-supercharged diesel engine are joined together. The combined system have acquisition analysis and simulation function which is translated into C language. it become efficient and transplantable.