Abstract:

The static and dynamic mathematical models of a new-type of engine and its hydraulic control system are established. For recurring the real system, a nonlinear mathematical model is used in the engine and afterburning fuel control system. Component characteristics is used to formulate a set of nonlinear equations solved by descending order method, the mathematical model thus can be obtained.The program made on basis of these models is implemented on a large digital computer. It can be used to conduct simulation research. Program flow charts for solving static and dynamic mathematical model are illustrated.Using this program, detailed analysis has been made for the static and dynamic close loop characteristics of this engine and its control system under the condition of afterburning. Satisfactory results and valuable conclusions have been obtained. The research is useful in solving the practical problem for this engine control system and to conduct the improvement of new designs in the future.

Key words: engine control, mathematical model, afterburning dynamic characteristics, digital simulation