Adaptive control design for active Pogo suppression based on vibration-acceleration feedback
Adaptive control design for active Pogo suppression based on vibration-acceleration feedback
复制标题
DOI：
10.1016/j.actaastro.2023.10.035
复制
发表时间：
2023-11
影响因子：
3.5
通讯作者：
Wang Zhao;Shujun Tan;Yiliang Guo
中科院分区：
文献类型：
--
作者：
Wang Zhao;Shujun Tan;Yiliang Guo
Pogo抑制方法可分为主动抑制和被动抑制。在实际工程中，一般采用被动抑制的方法，但这种方法有时不能满足模型参数不确定、参数时变的液体火箭发动机的设计要求。而主动抑制方法大多采用状态变量作为反馈，实用性差。在这项研究中，自适应Pogo主动抑制控制器的设计方法，提出了测量加速度作为反馈。利用特征空间变换理论设计了两类降维模型：面向观测的降维模型（O-ODRM）和面向控制的降维模型（C-ODRM）。前者用于观测器的设计，其状态变量可以通过测量加速度重构，经过矩阵运算后输入到自适应控制器。后者用于自适应控制器的设计，它可以有效地处理模型参数不确定性和参数时变的问题。为了验证该方法的有效性，选择某型火箭作为研究对象进行仿真分析。仿真结果表明，该方法以测量加速度作为反馈，可以实现对参数不确定和时变的液体火箭发动机的Pogo主动抑制。
The Pogo suppression method can be divided into active suppression and passive suppression. For practical engineering, passive suppression is generally achieved through accumulators, but this method sometimes cannot meet the design requirements of liquid rockets with uncertain model parameters and time-varying parameters. As for active suppression methods, state variables are mostly used as feedback thus leading to poor practical feasibility. In this study, an adaptive Pogo active suppression controller design method is proposed where measured acceleration is used as feedback. The eigenspace transformation theory is utilized to design two types of dimensional reduced models: an observation-oriented dimensional reduced model (O-ODRM) and a control-oriented dimensional reduced model(C-ODRM). The former works for observer design, and its state variables can be reconstructed by measuring only the acceleration and can be input to the adaptive controller after matrix operations. The latter is employed for adaptive controller design, and it can effectively process the issues of model parameter uncertainty and time-varying parameters. To demonstrate the effectiveness of the proposed method, a certain type of rocket was selected as the research object for simulation analysis. The simulation results show that the proposed method, which uses measured acceleration as feedback, can achieve Pogo active suppression for liquid rockets with uncertain and time-varying parameters.