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Multi-redundancy electromechanical servo system for adjusting thrust and mixing ratio of liquid-propellant rocket engine

An electromechanical servo system and thrust adjustment technology, which is applied in the direction of rocket engine devices, control/regulation systems, engine control, etc., can solve the problems that cannot meet the small and light application requirements of liquid rocket engines, large size and weight of electromechanical actuators, and electromechanical problems. Servo control reliability is weak and other problems, to achieve the effect of improving the adjustment control characteristics, improving reliability, improving reliability and use maintainability

Active Publication Date: 2018-10-16
XIAN AEROSPACE PROPULSION INST
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AI Technical Summary

Problems solved by technology

[0007] (1) The size and weight of redundant electromechanical actuators are large, which cannot meet the application requirements of small and light liquid rocket engines
[0008] (2) The inherent reliability of the servo drive is low, and the failure rate is high, which is the weak link in the reliability of the electromechanical servo control

Method used

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  • Multi-redundancy electromechanical servo system for adjusting thrust and mixing ratio of liquid-propellant rocket engine

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Embodiment Construction

[0036] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.

[0037] The present invention proposes an electromechanical servo system capable of realizing "three-redundancy control and double-redundancy drive" for thrust and mixing ratio, high reliability, high precision, and quick response adjustment. Such as figure 1 As shown, it includes servo controller 1, thrust adjustment servo driver 2, mixing ratio adjustment servo driver 3, thrust adjustment electromechanical actuator 4, mixing ratio adjustment electromechanical actuator 5, thrust adjustment position sensor 6, and mixing ratio adjustment position sensor 7. Thrust regulator 8 and mixing ratio regulator 9.

[0038] Servo controller 1 is a three-redundancy servo controller: it receives the engine thrust adjustment command issued by the rocket-borne computer and the position information of the thrust regulator 8 fed back by the thrust regulator pos...

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Abstract

The invention discloses a multi-redundancy electromechanical servo system for adjusting the thrust and a mixing ratio of a liquid-propellant rocket engine. A three-redundancy servo controller, a double-redundancy servo driver, a double-winding electromechanical actuator, a three-redundancy position sensor, a thrust adjustor and a mixing ratio adjustor are included. An engine thrust and mixing ratio adjusting instruction and a position feedback signal of the three-redundancy position sensor are input to the three-redundancy servo controller; the three-redundancy servo controller outputs a thrust and mixing ratio adjusting PWM wave control signal to the double-redundancy servo driver; the double-redundancy servo driver outputs a three-phase frequency varying and amplitude varying sine wave current to drive the double-winding electromechanical actuator to drive the thrust adjustor and the mixing ratio adjustor to move; and adjusting of the thrust and the mixing ratio of the engine is achieved. The servo system is simple and excellent in control characteristic, has the capacity of controlling two-redundancy fault work and driving one-redundancy fault work, and the reliability of adjusting the thrust and the mixing ratio of the liquid-propellant rocket engine and the using maintenance are remarkably improved.

Description

technical field [0001] The invention relates to an electromechanical servo system for adjusting redundancy of thrust and mixing ratio of a liquid rocket engine, and belongs to the field of adjusting and controlling thrust and mixing ratio of a liquid rocket engine. Background technique [0002] Early liquid rocket engines generally use electro-hydraulic servo control or stepper motor control. The SSME main engine of the American space shuttle has its own controller to control the electro-hydraulic servo-actuated valve to realize the closed-loop adjustment of thrust and mixing ratio. Russian RD-171M and RD-180 engines use seven-digit electro-hydraulic servo-actuated valves to realize closed-loop adjustment of thrust and mixing ratio. The actuator energy is provided by the ground motor pump supply device before the engine starts, and the engine starts to a certain working condition Then switch to the fuel pump drainage supply. Russian NK-33 and RD-0120 engines use stepping m...

Claims

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Application Information

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IPC IPC(8): F02K9/56
CPCF02K9/56F05D2270/62F05D2270/66F02K9/60F05D2270/3015F15B18/00F02K9/42F02K9/58G06F11/1641G05B9/03
Inventor 张晓光陈晖杨亚龙魏京芳董国创马冬英蒲星星
Owner XIAN AEROSPACE PROPULSION INST
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