Integrated Simulation and Control of Turbojet Engine Dynamics and Fixed-wing Airplane Flight Dynamics

Document Type : Dynamics, Vibrations, and Control

Authors

1 Corresponding author: Professor, Faculty of Mechanical Engineering, Iran University of Science and Technology, Tehran, Iran

2 Ph.D. Student, Faculty of Mechanical Engineering, Iran University of Science and Technology, Tehran, Iran

Abstract

In this article, the simulation and integrated control of flight-propulsion are addressed as a significant and necessary research topic in the aerospace industry. In previous research, flight control and turbine engine control have often been treated separately; however, the mutual effects of flight dynamics and turbine engine dynamics on one another have received less attention. Initially, to model the movement of the UAV body, kinematic and flight dynamics equations are presented. Transmission equations are developed based on Newton’s laws, and rotational equations are derived from Euler’s theory. Subsequently, the thermodynamic and dynamic equations necessary for turbojet engine modeling are introduced. The equations governing the engine inlet opening, compressor, turbine, combustion chamber, and nozzle are examined separately. All simulations are conducted in MATLAB/Simulink. Flight graphic is displayed in real-time using FlightGear software. A structure for simulating and controlling flight dynamics and engine dynamics is proposed, addressing not only the control of flight and the UAV’s trajectory but also the control of the shaft’s rotational speed while observing the limitations of the turbojet engine. Additionally, flight-propulsion control coefficients are simultaneously optimized for a specific mission using genetic algorithm. Finally, the simulation results are presented and discussed.

Graphical Abstract

Integrated Simulation and Control of Turbojet Engine Dynamics and Fixed-wing Airplane Flight Dynamics

Highlights

  • Optimization of control coefficients
  • Interactions between flight dynamics and turbojet engine dynamics
  • Real-time flight display
  • Desired speed and height tracking with respect to engine limitations

Keywords

Main Subjects

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References

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Aerospace Mechanics
Volume 20, Issue 4 - Serial Number 78
Serial No. 78, WinterQuarterly
March 2025
Pages 103-116

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History

  • Receive Date: 28 September 2024
  • Revise Date: 05 November 2024
  • Accept Date: 17 November 2024
  • Publish Date: 19 February 2025

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