Intelligent service life prolonging control method for reuse of retired aero-engine

Abstract

The invention provides an intelligent life prolonging control method for reuse of a retired aero-engine, which comprises the following steps: establishing a thermal mechanical fatigue life model according to engine performance parameters and turbine guide vane material characteristic parameters; designing different acceleration limiting plans in the early acceleration stage, the middle acceleration stage and the later acceleration stage respectively; in order to prolong the service life and improve the dynamic performance, constructing an objective function by adopting an evaluation function method, and converting a multi-objective optimization problem into a single-objective optimization problem; and adding the thermal mechanical fatigue life model and the acceleration limit plan into a main controller, performing joint simulation with the engine complete machine model, obtaining each parameter value in the acceleration limit plan through continuous optimization iteration, and determining the final acceleration limit plan as a life extension control rule. According to the method, only the acceleration control rule of the retired aero-engine needs to be modified and optimized, hardware of an engine body and a controller does not need to be changed, the modification difficulty is small, the cost is low, and the effect is obvious.

Description

technical field [0001] The invention relates to the reuse of decommissioned aero-engines, in particular to an intelligent life extension control method for the re-use of decommissioned aero-engines. Background technique [0002] The reuse of decommissioned aero-engines is to transform the used military aero-engines into land-use power plants, which are used for gas turbine power generation, snow removal and fire-fighting power, etc. Due to the design of the aero-engine with a certain margin, the modified land-use power unit has the advantages of small volume and weight, wide power range, high efficiency, quick start, and strong fuel adaptability. Due to the needs of aircraft combat maneuverability, military aero-engines first consider how to better exert the performance of the engine, such as faster acceleration performance and higher stability. In the process of designing the control system, the use of the engine is rarely considered life. [0003] If the decommissioned a...

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Problems solved by technology

[0005] 1) The reuse of decommissioned aero-engines usually improves the service life of the engine by reducing the working state. This method cannot solve the problems of high temperature of hot-end components and severe aerodynamic load during dynamic processes such as engine start-up and acceleration;

[0006] 2) Some methods of prolonging engine life, such as clearance control, cooling modulation, component repair, etc., need to change the main structure and hardware of the engine, which is technically difficult and costly, and is not suitable for the low-cost modification requirements of decommissioned aeroengines;

[0007] 3) In the design of traditional aero-engine control systems, the priority is how to maximize the performance of the engine, without considering the service life of the engine. At present, the method of transplanting the original control system is generally adopted for the reuse of decommissioned aero-engines, so the engine’s The service life is still not guaranteed

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