PRINCIPLES TO DESIGN A COMPUTER DYNAMIC MODEL OF AUTOTRACTOR ICE

The principles of designing a compute dynamic model of autotractor internal combustion engines (ICE) are investigated and summarized. The dynamics model is designed; the criterion to identify the model with the object is presented. The formal description of the object for examination (OE) includes ICE functional pattern with multiple parameters introduced, which are characteristic of the one, so was introduced the basis of operators that establish the ratio between these parameters. The dynamic model realizes ICE equations, which are known from the theory, in moments. When modeling, OE different mathematical descriptions are used including the descriptions analogous to the ones which are employed in the treatment of measuring processes, particularly angular velocity and crankshaft acceleration: making up and solving differential equations of ICE and the system of automatic control of the velocity regime under static and dynamic regimes, determining the transition characteristics, amplitude-frequency and energetic spectrums, auto- and mutually correlative functions, dynamic velocity characteristics, integral characteristics and special indexes. Consider the example by means of MATLAB package with modeling the transitions analogous to the ones measured by angular velocity of ICE crankshaft when localizing the defects including those of amplitude-frequency spectrums of crankshaft angular velocity impulse sequence which characterize operational processes of individual cylinders.

автотракторный двигатель, рабочие процессы, диагностирование, измерительная экспертная система, динамика, компьютерная модель, autotractor engine, operational processes, diagnosing, measuring and expert system, dynamics, computer model

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