Adaptive control design for active Pogo suppression based on vibration-acceleration feedback

Article Engineering, Aerospace

Adaptive control design for active Pogo suppression of large strap-on liquid launch vehicles

Shujun Tan et al.

Summary: To better address the issue of Pogo stability in large launch vehicles under parameter uncertainty and time-variation, this study proposes a model-reference adaptive control based on the dimensionality reduction model (MRAC-DRM). A state space Pogo model with an active controller is first established using the improved Rubin method. Then, a greatly reduced dimensional model of the Pogo control system is derived through eigenvalue transformation theory, which retains the Pogo instability characteristics and is suitable for control design. The effectiveness of the proposed MRAC-DRM is demonstrated through simulation examples with different types of propulsion systems, showing its adaptability to parameter uncertainty and insensitivity to the initial value of feedback gain.

ACTA ASTRONAUTICA (2023)

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Article Engineering, Aerospace

Comprehensive Load Relief of Launch Vehicle with the Constraints of Legacy Stages

Zhengyu Song et al.

Summary: In the face of diverse launch needs, it is inefficient to develop new rockets from scratch. The idea of combining existing modules into a new launcher is appealing. However, due to differences in propulsion system configuration, payloads, and trajectories, existing mature modules may not be suitable for new flight profiles. Therefore, structural load relief measures are crucial for module integration.

AIAA JOURNAL (2022)

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Article Engineering, Aerospace

New Dimensionality Method for Pogo Analysis in Liquid Vehicle

Tao Wang et al.

AIAA JOURNAL (2021)

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Article Engineering, Aerospace

A novel active control on Pogo vibration in liquid rockets based on data-driven theory

Su Jia et al.

Summary: In this study, a novel active control technique was developed to suppress Pogo vibration in liquid rockets using data-driven adaptive dynamic programming method. Enhanced control strategy implemented using data-driven theory can remarkably increase Pogo stability in liquid rockets, validating the effectiveness of the proposed method.

ACTA ASTRONAUTICA (2021)

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Article Engineering, Aerospace