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| Design and Verification of a Burner-based Hot Wind Tunnel Control System |
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| DOI：10.7643/issn.1672-9242.2022.05.010 |
| KeyWord:hot wind tunnel burner control system decoupling dual-loop PID control coordinated control |
| Author | Institution |
| WU Song-wei |
College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing , China |
| ZHANG Tian-hong |
College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing , China |
| LI Ling-wei |
College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing , China |
| LI Jia-ao |
College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing , China |
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| Abstract: |
| This paper is to research a burner-based hot wind tunnel control system, focusing on its airflow and temperature control. For transient air source, the continuous drop in pressure tends to lead to flow instability, and there is a coupling relationship of flow to temperature control, so a decoupling-based dual-loop PID control strategy is proposed. Aiming at the problem of poor dynamic characteristics of the large-flow air circuit control valve, a dual-circuit coordinated control strategy with an auxiliary air circuit is proposed. Through the joint simulation of AMESim and MATLAB, the model of the hot wind tunnel test system was established and the dynamic characteristics of the hot wind tunnel control system were analyzed. A controller was built based on the cRIO platform, and practical control experiments were carried out on the hot wind tunnel. The test results show that the steady-state error of airflow is not greater than 2%, the temperature fluctuation is not greater than 1%, and the stabilization time is > 25 s, which meet the design and use requirements of the hot wind tunnel. Factors such as airflow and fuel flow etc. have a large impact on the outlet temperature. The integrated control strategy of airflow and temperature can achieve airflow control and temperature control under different air flows and maintain a stable state for a long period of time. |
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