A control method for anti-asthma control of a full-authority digital electronically regulated engine
A control method and technology of digital ESC, applied in the direction of fuel control of engine components, machines/engines, turbines/propulsion devices, etc., can solve the problems of the logic, timing, fuel quantity defects of the anti-surge system, and the inability to meet the needs of the engine. , to achieve the effect of the minimum fuel limit
Active Publication Date: 2017-02-01
AECC SHENYANG ENGINE RES INST
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Problems solved by technology
[0005] There is no mature experience in the development of domestic full-authority digital ESC control engine anti-asthma system for reference, and it is still in the exploratory stage. The logic, timing, and fuel volume of the anti-asthma system have defects, which cannot meet the needs of the engine.
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[0053] The present invention will be described in further detail below through specific embodiments and in conjunction with the accompanying drawings.
[0054] In the figure, K1 is the surge command.
[0055] According to the method discussed in the present invention, the digital electronically adjustable engine anti-surge system composed of surge signal device, anti-surge controller and actuator sets the maximum operation time of anti-surge control to 1.2s. The resumption of oil supply time t after oil cut-off is set to 1s, and the minimum oil-cut control working time tmin is set to 0.8s. The minimum cut-off flow rate Wf of the engine when it is exhausted min Set to 200kg / h.
[0056] Oil cut control method is:
[0057] When Wf>Wf min When +250, the oil return duty ratio solenoid valve PWMLs works, and the oil is cut by controlling the main fuel duty ratio solenoid valve PWMLm and the oil return duty ratio solenoid valve PWMLs in open loop;
[0058] When Wf≤Wf min +250, ...
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The invention relates to a method for realization of cutting oil time, cutting oil method, minimum oil quantity limit and geometric angle control of a surge-eliminating system, and the method is characterized in that, the cutting oil control method is as follows: when Wf is greater than Wfmin + C, oil return duty ratio electromagnetic valve PWMLs works, main fuel duty ratio electromagnetic valve PWMLm and the oil return duty ratio electromagnetic valve PWMLs are controlled to open loop for cutting oil; when Wf is less than or equal to Wfmin + C, the oil return duty ratio electromagnetic valve PWMLs stops working, the main fuel duty ratio electromagnetic valve PWMLm is controlled for closed-loop control of Wf for reducing to minimum fuel quantity Wfmin. The advantages of the method are that: according to the surge-eliminating control method of a full-authority digital electrically controlled engine, , the validity of surge-eliminating measures is verified by ground tests, high altitude table tests and flight tests, the engine surge can be successfully eliminated, and the method has theminimum fuel limit function, and may not cause the engine to stop.
Description
technical field [0001] The invention belongs to the field of realization and debugging of full-authority digital electronically adjustable aeroengine, ground and marine gas turbine anti-asthma control methods, and relates to the realization of the oil-cutting time, oil-cutting method, minimum oil volume limit, and geometric angle control of the anti-asthma system method. Background technique [0002] With the development of aero-engines, more and more people pay attention to the stability of the engines. Surge is an unstable working state in the turbofan engine compressor, which is sudden. If it is not handled properly, it can damage the engine in a short time or even cause serious consequences. [0003] In order to ensure the stable and reliable operation of the engine within the full envelope, the design of the engine should leave a certain surge margin. In order to pursue high performance and high maneuverability, the operating conditions are more severe, the engine par...
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IPC IPC(8): F02C9/00F02C9/28F02C9/18
Inventor 刘永泉李昌红张千一荣莉李利叶迪
Owner AECC SHENYANG ENGINE RES INST