Abstract
The aircraft engine bleed air simulation thermodynamic laboratory simulation parameters include the bleed air pressure and temperature. However, existing laboratories cannot carry out the dynamic test of the engine bleed air simulation. In the engine bleed air simulation dynamic test, the temperature control has the characteristics of strong coupling and nonlinear and large inertia. The conventional control strategy cannot solve the contradictions of the response speed and stability of the system. Moreover, the dynamic control of the pressure and temperature involve strong coupling. That often leads to the failure of control decisions. Therefore, there is still no relevant report on the laboratory equipment used for the engine dynamic bleed air simulation. According to the above problem, this study adopted heat exchangers for indirect heating to reduce the coupling of dynamic control between temperature and pressure. Specifically, to take into account the rapid response and stability of the system, this study used the lookup table-based PID (LPID) controller to control the temperature and pressure of the bleed air simulation test. The dynamic test errors were within 10%, and the steady-state accuracies were within ±2%. The simulation software results and the engine bleed air simulation test results showed that temperature and pressure control systems based on the LPID controller have advantages: high control precision, a low overshoot amount, a fast response, and a high stability.
Highlights
The thermal anti-icing and environmental control system (TAI/ECS) is one of the critical systems of onboard aircraft equipment [1,2] which guarantees the safety, health, and comfort of the pilots and passengers as well as the regular operation of onboard equipment [3]
With the help of the theoretical model of the thermodynamic laboratory equipment, the pressure and the temperature change were controlled with the same control organs in simulation software, and compared the performance difference between the PID controller and lookup table-based PID (LPID) controller in temperature control
The simulation results showed that the LPID controller gave a better performance than the PID controller
Summary
The thermal anti-icing and environmental control system (TAI/ECS) is one of the critical systems of onboard aircraft equipment [1,2] which guarantees the safety, health, and comfort of the pilots and passengers as well as the regular operation of onboard equipment [3]. The thermodynamic laboratory equipment for the engine bleed air simulation is a universal test platform for performance testing of the TAI/ECS. Zheng Dai and Yi Cui [4] proposed a hot and cold blending method to achieve the rapid temperature adjustment in the thermodynamic laboratory. This was verified to be effective by Yi Cui [5] with a Simulink simulation, but the work only considered theoretical simulations. Jian Wang et al [6] proposed a comprehensive control method based on humanoid intelligence to solve problems such as the slow heating rate, the long state switching response time, and so on in the current aircraft engine compressor bleed air simulation test equipment. The dynamic performance test of the TAI/ECS faces considerable challenges [7]
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
