Open-loop turbine engine steady state control method

A technology of turbine engine and steady-state control, applied in engine components, machines/engines, mechanical equipment, etc., can solve problems such as engine speeding, overtemperature, etc., and achieve good results.

Pending Publication Date: 2022-05-10
BEIJING POWER MACHINERY INST
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  • Claims
  • Application Information

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Problems solved by technology

However, due to the dependence on gas path parameters and engine speed signals, once the gas path parameters or speed signals fail, the engine will run away or overheat, causing serious consequences

Method used

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  • Open-loop turbine engine steady state control method
  • Open-loop turbine engine steady state control method

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Embodiment Construction

[0023] The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0024] The invention provides an open-loop turbine engine steady-state control method, comprising the steps of:

[0025] Step 1, through the mathematical model of the engine, the functional relationship between engine thrust and fuel flow under different flight conditions is established as follows:

[0026] Fn=f1(qmf, H, Ma, Tt0, σ) (1)

[0027] Among them, Fn is the net thrust of the engine; qmf is the fuel flow of the engine; H is the flight altitude, which comes from the information of the aircraft; Ma is the flight Mach number, which comes from the information of the aircraft; Tt0 is the total temperature of the incoming flow, which comes from the information of the aircraft; pressure recovery coefficient.

[0028] Establish the functional relationship between engine throttle voltage Uy and thrust:

[0029] Fn=f2(Uy, H, Ma, Tt0, σ) (2)

[0030] Amo...

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Abstract

The open-loop turbine engine steady state control method does not depend on a rotating speed signal of the engine, and when the rotating speed signal of the engine breaks down, it can still be guaranteed that the engine works safely and reliably, preset thrust is given out, and use of an aircraft is met. According to the method, through engine thrust bridging, a mathematical model of engine throttle voltage and fuel flow in flight is established, and when it is detected that an engine rotating speed signal is abnormal and rotating speed closed-loop control cannot be adopted, the engine is controlled to work in an open-loop mode, so that the engine can still complete preset functions. Due to the fact that the rotating speed signal is abnormal, the maximum rotating speed and the minimum rotating speed of the engine cannot be limited, the oil supply boundary of the working area of the engine is designed through a mathematical model, and the oil supply boundary is corrected through the difference between the actual performance of the engine and the model engine.

Description

technical field [0001] The invention relates to the technical field of turbine engine control, in particular to an open-loop steady-state control method for a turbine engine. Background technique [0002] At present, the steady-state control of turbine engines at home and abroad generally adopts the closed-loop control based on the speed, which is a control method to correct the fuel supply according to the feedback of the control object n (n represents the engine speed), and is assisted by the maximum physical speed limit, the maximum converted speed limit and The maximum gas temperature limit has the outstanding advantages of high control precision and high safety. However, due to the dependence on the gas path parameters and the engine speed signal, once the gas path parameters or the speed signal fail, the engine will run away or overheat, causing serious consequences. Contents of the invention [0003] In view of this, the present invention proposes an open-loop stea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01D21/00G06F30/20G06F119/14G06F119/08
CPCF01D21/00F01D21/003G06F30/20G06F2119/14G06F2119/08
Inventor 赵英王汉权李胜利陈宝延
Owner BEIJING POWER MACHINERY INST
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