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Using a Predictive Model to Control the Thrust Vector of a Multi-Chamber Liquid Rocket Engine with a Central Body
https://doi.org/10.17586/0021-3454-2026-69-3-211-224
Abstract
A mathematical model of dynamic processes in a multi-chamber liquid rocket engine with a central body (liquid propellant rocket engine with a central heating element) is presented, mathematical models of a branched tube, a combustion chamber, a flow regulator, and the process of flowing around the central body with jet streams are described. Expressions using the components of the state vector are proposed for the non-stationary parameters of the model. The numerical values of the parameters are consistent with the results of thermodynamic calculations using the Navier— Stokes equations for the alcohol-oxygen fuel pair and the geometric parameters of the engine demonstration model. The thrust of a separate chamber and its corresponding component of interaction with the central body are expressed as functions of the components of the state vector of the engine. The thrust vector of the engine is represented as the sum of the thrust vectors of all chambers, adjusted for the interaction of gas flows with the central heating system. A control variant of a liquid propellant rocket engine with a central heating system is formed based on a predictive model, while the control characteristics are obtained by numerical modeling.
Keywords
multi-chamber liquid-propellant rocket engine with a central body,
predictive model-based control,
thrust vector control
Supporting agencies: The work was carried out with the financial support of the Ministry of Science and Higher Education of the Russian Federation (state assignment FENU-2024-0004 dated 17.01.24).
About the Author
V. S. Masyagin
South Ural State University
Russian Federation
Russian Federation
Vladimir S. Masyagin — Department of Information and Measurement Technology, Laboratory of Aircraft Control Systems; Engineer
Chelyabinsk,
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For citations:
Masyagin V.S. Using a Predictive Model to Control the Thrust Vector of a Multi-Chamber Liquid Rocket Engine with a Central Body. Journal of Instrument Engineering. 2026;69(3):211-224. (In Russ.) https://doi.org/10.17586/0021-3454-2026-69-3-211-224
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