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Controller and control method of solid-liquid variable thrust engine based on linear active disturbance rejection

An engine controller, linear active disturbance rejection technology, applied in the direction of machine/engine, rocket engine device, mechanical equipment, etc., can solve the problems of inaccurate control and uncertain oxygen-fuel ratio, and achieve the effect of alleviating inaccurate control.

Active Publication Date: 2022-05-06
BEIHANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] In view of this, the object of the present invention is to provide a solid-liquid variable thrust engine controller and control method based on linear active disturbance rejection, so as to alleviate the inaccurate control caused by the uncertain oxygen-fuel ratio and pressure difference in the prior art technical issues

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  • Controller and control method of solid-liquid variable thrust engine based on linear active disturbance rejection
  • Controller and control method of solid-liquid variable thrust engine based on linear active disturbance rejection

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Embodiment 1

[0024] figure 1 It is a schematic diagram of a solid-liquid variable thrust engine controller based on linear active disturbance rejection provided according to an embodiment of the present invention, and the engine controller is applied to a solid-liquid variable thrust engine. Such as figure 1 As shown, the engine controller includes: a linear active disturbance rejection controller 10 and a variable venturi 20 .

[0025] Specifically, the linear active disturbance rejection controller 10 is used to obtain the actual control of the variable venturi 20 by using the actual thrust Tc of the solid-liquid variable thrust engine, the thrust error e, and the actual opening δ of the adjustable valve as input quantities. quantity. Wherein, the adjustable valve is the valve of the variable venturi 20; the thrust error e is the error between the expected thrust Tr and the actual thrust Tc of the solid-liquid variable thrust engine.

[0026] The variable venturi tube 20 is used to co...

Embodiment 2

[0045] figure 2 It is a flow chart of a control method for a solid-liquid variable thrust engine based on linear active disturbance rejection provided according to an embodiment of the present invention. The method is applied to a solid-liquid variable thrust engine controller based on linear ADRR; wherein, the engine controller includes: a linear ADRR controller and a variable Venturi tube. Such as figure 1 As shown, the method specifically includes the following steps:

[0046] Step S202, using the actual thrust of the solid-liquid variable thrust engine, the thrust error and the actual opening of the adjustable valve as the input of the linear active disturbance rejection controller to obtain the actual control amount of the variable venturi; the adjustable valve is The valve of the variable venturi tube; the thrust error is the error between the expected thrust and the actual thrust of the solid-liquid variable thrust engine.

[0047] Step S204, controlling the opening...

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Abstract

The invention provides a solid-liquid variable thrust engine controller and control method based on linear ADRR, including: a linear ADRC controller and a variable venturi tube; The actual thrust of the variable thrust engine, the thrust error and the actual opening of the adjustable valve are used as input to obtain the actual control value of the variable venturi; the adjustable valve is the valve of the variable venturi; the thrust error is the solid-liquid variable The error between the expected thrust and the actual thrust of the thrust engine; the variable venturi tube is used to control the opening of the adjustable valve based on the actual control amount, and the flow rate of the liquid oxidizer flowing through the variable venturi tube is controlled as the target flow rate. The invention alleviates the technical problem of inaccurate control due to uncertain oxygen-fuel ratio and pressure difference existing in the prior art.

Description

technical field [0001] The invention relates to the technical field of rocket engine control, in particular to a controller and a control method for a solid-liquid variable thrust engine based on linear active disturbance rejection. Background technique [0002] General solid-liquid hybrid rocket motors use solid fuel and liquid oxidant to generate thrust through chemical reactions. The solid fuel is poured in the combustion chamber in a specific configuration, and the liquid oxidant is pressurized by extrusion or pump pressure, and sent into the combustion chamber through the liquid delivery system, and chemically reacts with the solid fuel to produce high-temperature and high-pressure gas. The tube accelerates to form a high-speed low-temperature gas, which is ejected backward, thereby generating a forward reaction force. [0003] As its inheritance and development, the solid-liquid hybrid variable thrust rocket engine has the function of adjusting the thrust of the engin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02K9/80F02K9/72
Inventor 宋佳胡云龙赵鸣飞罗雨歇尚维泽
Owner BEIHANG UNIV
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