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- 저자 : Qiangang Zheng (검색결과 2 건)
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Qiangang Zheng,Shuwei Pang,Haibo Zhang,Zhongzhi Hu 한국항공우주학회 2019 International Journal of Aeronautical and Space Sc Vol.20 No.4
For enhancing engine response ability, a novel nonlinear model predictive control (NMPC) method for aero-engine direct thrust control is proposed. The control objective of the proposed method is the thrust instead of the measurable parameters. The online-sliding window deep neural network (OL-SW-DNN) is proposed as predictive model. The OL-SW-DNN adopts deep-learning structure to increase the model accuracy and selects the nearest point data of certain length as training data which will reduce the sensitivity for the noise of training data. The direct thrust simulations of the popular NMPC based on extended Kalman filler (EKF) and the proposed one are conducted, respectively. The simulations demonstrate that compared with the popular NMPC, the proposed NMPC decreases the acceleration time by 0.425 s and increases response speed about 1.14 times.
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Changpeng Cai,Qiangang Zheng,Yong Wang,Haibo Zhang,Fengyong Sun 한국항공우주학회 2023 International Journal of Aeronautical and Space Sc Vol.24 No.2
The acceleration performance of aero-engine is an important guarantee to realize the rapid maneuvering of aircraft. The sharp change of inlet temperature of turbine caused by acceleration process poses a great challenge to the service life of high pressure turbine guide vane, and then influences engine life. How to reach a compromise between the acceleration performance and service life is one of the troublesome issues in the design and research of aero-engine control system. To handle this problem, this paper proposes an engine acceleration control method with variable outlet bleed of compressor considering the life of high pressure turbine guide vane. SQP algorithm is adopted to take into account the mechanical thermal fatigue life of turbine guide and the shortest acceleration time as the optimization objectives. In the acceleration process, the outlet bleed of compressor is adjusted to shorten the acceleration time. The simulation results demonstrate that compared with the conventional acceleration control method, the variable bleed acceleration control can decrease the acceleration time by 10%. While considering the service life of high pressure turbine guide vane, on the premise of the same acceleration time as the conventional method, the temperature gradient of high pressure turbine guide vane is reduced by 50%, the number of safe life cycles increase by 24%, and the service life of high pressure turbine guide vane is effectively enhanced.
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