It is complex to simulate the system with continue controlled object and discrete controller, in order to avoid the complexity, a new method to describe the continue controlled object of internal combustion engine with discrete model was given, which is based on the principle of the total energy of an isolated system is constant and the theory of heat transfer in the cylinder, for the internal combustion engine has the special cycle of operation. In the paper, an example of ethanol-gasoline internal combustion engine was given to prove the modeling way is feasible. The digital fuzzy PID controller is design and the simulation results show that the controller is workable. The discrete model will be used in digital controller design and simulation for the fuel supplying control.
In this paper, based on the author of many years engineering practice, analyzes and discusses the common problem in the application of high strength static pressure concrete pipe pile. For the reasonable application of pipe pile in Changchun area provide advices and references.
Pulse detonation engine is a kind of new engine for spacecraft, it is difficult to control for there is no moving parts in engine combustion chamber and detonation speed is very fast. The engine model was given based on thermodynamics equations in the paper. A multi-rate digital controller for a pulse detonation engine based on the engine model was also given. The simulation results show that the control method is effective. The detonation engine model provides a basis for developing and validating controllers capable of controlling the engine.
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