CASPIAN JOURNAL
MANAGEMENT AND HIGH TECHNOLOGIES
The method of determining the optimal control of heating process of the engine oil under conditions of a priori uncertainty of its properties
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Read | Nikitin A. V., Chistoprudov D. A. The method of determining the optimal control of heating process of the engine oil under conditions of a priori uncertainty of its properties // Caspian journal : management and high technologies. — 2018. — №2. — pp. 69-84. |
Nikitin A. V. - adjunct, branch of the Military Academy of Strategic Missile Forces named after Peter The Great, 17 Brigadnaya St., Serpukhov, 142202, Russian Federation, nik.al2010@mail.ru
Chistoprudov D. A. - Cand. Sci. (Engineering), Associate Professor, branch of the Military Academy of Strategic Missile Forces named after Peter The Great, 17 Brigadnaya St., Serpukhov, 142202, Russian Federation, umasa76@mail.ru
The paper describes the sequence of making decisions for solving an optimization problem on minimization of engine oil heating time in internal combustion engine (ICE) by using a start-up system consisting of external electric heating elements and a master controller. In the process of heating, the latter ensures coordinated changes in such parameters as the given power (N), the involved area of electric heating elements (F) and speed of a heated oil flow (w) formed by means of a crankshaft irrigation system electric pump. The paper studies the dynamics of redistribution of the power supplied to the system between the electric heating elements and the electric pump under the conditions of a significant change in the physical and chemical properties of the oil when passing from one state to another. The change dependencies in the physical and chemical properties of the oil obtained by means of polynomial approximation is presented, describing their values in the temperature range from -50 C to +20 C. The paper presents results of the study of the real process of heating the engine oil, implemented using a specialized stand within the specified temperatures. The stand experiments made it possible to synthesize the heat-transfer coefficient values formation model depending on the w, T(engine oil temperature), N and F parameters; the model is implemented using a fuzzy inference controller built according to the Sugeno scheme. The solution of the optimization problem in dynamic programming terms is justified. As a result, it became possible to find the dependencies of the internal combustion engine warm-up time on the w, T, N and F parameters; ; at fixed values of t and , it allowed to find the optimal laws of their (w, N and F) changes that guarantee the minimization of engine oil heating time.
Key words: двигатель внутреннего сгорания, система пуска двигателя внутреннего сгорания, моторное масло, процесс разогрева масла в картере двигателя внутреннего сгорания, коэффициент теплоотдачи, нечеткий аппроксиматор по схеме Сугено, оптимизационная задача управле