Research On Physical Simulation Of Fast Response Temperature Environment

In the matter-in-loop simulation experiment of aero-engine control system, the turbine outlet temperature, which characteristics with high and quick change, is hard to be simulated. For traditional simulation methods, which simulate the output of temperature sensor, measurement lag, fault and the environment noise of temperature sensors can't be considered. A temperature signal physical simulation method is proposed in this paper.The temperature simulation system is constructed and its controller is designed. The experiment results indicate that the temperature simulation system can meet the requirement of the matter-in-loop simulation of aero-engine control system.Firstly, the requirement of the temperature simulation system is analyzed. The outline design scheme is proposed. Difficulties in design progress are discussed and solutions are put forward. For the requirements of the system, a controller, whose kernel is ARM, is designed. The controller design includes hardware design and software design.Secondly, a close-loop controller based on PID control rule is designed. Open-loop model identification, close-loop experiments of the temperature simulation system and aero-engine model tracing experiments are accomplished. The experiment results indicate that the design and experiment scheme of the temperature simulation system is feasible.Finally, in order to solve the problems encountered in experiment, an improved design, including gas path, mechanism and controller design, is proposed. Experiments are accomplished in the improved system platform, and the results demonstrate that the improved system can meet the requirement of simulating the turbine outlet temperature of aero-engine.