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Self-adaptive control method for active suppression of carrier rocket Pogo

A technology of adaptive control and active suppression, which is applied in the direction of adaptive control, general control system, control/regulation system, etc., can solve the problems of lack of Pogo active suppression research, achieve enhanced Pogo active suppression effect, high computational efficiency, good Effects of Adaptability and Robustness

Active Publication Date: 2021-03-26
SHANGHAI AEROSPACE SYST ENG INST
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Problems solved by technology

[0005] In summary, it can be seen that the Pogo passive suppression design represented by the pressure accumulator design is mainly at present, and the research on the Pogo active suppression is lacking, only LQG, PD active control method

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  • Self-adaptive control method for active suppression of carrier rocket Pogo
  • Self-adaptive control method for active suppression of carrier rocket Pogo
  • Self-adaptive control method for active suppression of carrier rocket Pogo

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Embodiment Construction

[0022] The present invention and working process are described in detail below in conjunction with the embodiments.

[0023] A kind of self-adaptive control method of launch vehicle Pogo active restraint of specific embodiment of the present invention, comprises the following steps:

[0024] ①Use the state space modeling method of Pogo system to establish the state space model of Pogo vibration, as follows

[0025]

[0026] Where x is a state vector composed of propulsion system pulsation variables and structural system vibration variables, with dimension n, u is a control input, generally a scalar, E and A are system matrices, and B is a control input matrix.

[0027] ②Adopt the method provided in the patent “A Method to Solve Pogo Model Singularity Problem” previously applied by the inventor of this patent, and use the system matrix E and A of the original state x to construct the state transformation matrix corresponding to the reduced-order model and the eigenvalue ma...

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Abstract

The invention discloses a self-adaptive control method for active inhibition of liquid carrying Pogo, and the method comprises the following steps: based on an established Pogo system state space model, adopting a method for solving the singularity problem of the Pogo model, and acquiring a non-singular reduced-order model in a new state space through eigenvalue analysis; deriving an adaptive control law in a new state space by adopting a model reference adaptive control theory; and obtaining an adaptive control law of an original state space through feature transformation. The invention provides the self-adaptive control design method for Pogo active suppression by adopting a self-adaptive control theory, and the method can better adapt to the requirements of a large liquid rocket space distribution mode and a wide effective frequency range, has better adaptability and robustness for model parameter changes, and enhances the Pogo active suppression performance; therefore, a new methodis provided for Pogo inhibition of a large-scale liquid carrier rocket.

Description

technical field [0001] The invention relates to the field of Pogo vibration suppression of liquid carrier rockets, in particular to an adaptive control method for Pogo active suppression. Background technique [0002] Pogo vibration refers to a closed-loop self-excited vibration generated by the interaction between the longitudinal vibration of the liquid rocket structure and the fluid path pulsation of the propulsion system. Since the Pogo phenomenon was discovered in the Gemini project in the early 1960s, it has been identified as an important threat to launch vehicles and astronauts. With the deepening of research, people are more and more aware of the complexity and task dependence of the Pogo problem, especially the low-frequency density and modal coupling of the structural system of large and heavy launch vehicles, which further exacerbate the difficulty of Pogo passive suppression design. Therefore, whether Pogo vibration can be controlled or suppressed has become on...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B13/04
CPCG05B13/042Y02T90/00
Inventor 刘锦凡毛玉明谭述君盛英华毛承元赵旺
Owner SHANGHAI AEROSPACE SYST ENG INST
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