Fuzzy logic models for unsteady post stall maneuver
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摘要: 对模糊逻辑建模方法进行了深入的研究,讨论了非定常气动力的模糊逻辑建模与参数辨识方法,针对其在飞机非定常气动力建模与辨识中的应用提出新的思路,使之更具有实用性,并应用于实际算例的计算分析中.利用振荡三角翼的试验数据建立了非定常气动力的两种模糊逻辑模型:一种采用减缩频率进行建模,另一种考虑时间历程对非定常气动力的影响.结果表明,所建立模糊逻辑模型的计算结果与实验数据结果符合较好.采用这两种不同的模糊逻辑模型对飞机的眼镜蛇机动进行了模拟、仿真,检验了模型的实用性.Abstract: The fuzzy logic models of unsteady aerodynamics were lucubrated. The system′s fuzzy logic models, structures and parameters identification and model establishment were researched. The new modeling method makes the models has more abroad practicability. With using the typical test data, fuzzy logic modeling of nonlinear unsteady aerodynamic was developed. First, two fuzzy logic models of unsteady aerodynamics of oscillating delta wing were developed. One model employs the reduced frequency, the other uses the incidence history to account for the unsteadiness of flow characteristics. It was shown that both model results agree with the experimental values. Second, these two fuzzy logic models were used to simulate the typical post-stall Cobra maneuver, and the applicability of these two fuzzy logic models were demonstrated.
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Key words:
- fuzzy logic /
- unsteady aerodynamics /
- Cobra maneuver
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[1] Wang Z J, Lan C E, Brandon J M. Fuzzy logic modeling of lateral-directional unsteady aerodynamics . AIAA-99-4012, 1999 [2] 尹江辉,刘昶．非定常气动力辨识的模糊逻辑方法[J]．南京航空航天大学学报,2000,32(5):545-550 Yin Jianghui, Liu Chang. Fuzzy logic modeling of unsteady aerodynamics[J]. Journal of Nanjing University of Aeronautics and Astronautics, 2000, 32(5):545-550(in Chinese) [3] Tan J, Xie H, Lee Y C. Efficient establishment of a fuzzy logic model for process modeling and control[J]. IEEE Transactions on Semiconductor Manufacturing, 1995,8(1): 51-61 [4] 汪清．飞机大攻角非定常气动力建模及其应用研究 ．西安:西北工业大学航天工程学院,1994 Wang Qing. Unsteady aerodynamic models at high angles-of-attack and their application . Xi’an: College of Aeronautics, Northwestern Polytechnic University, 1994(in Chinese) [5] He Kaifeng, Wang Qing, Cai Jinshi. Unsteady aerodynamic models at high angles-of-attack and their application to numerical simulation of post stall maneuvers Proceedings of the Fifth Russian-Chinese Symposium on Aerodynamics and Flight Dynamics, 1997:143-151 [6] 刘志涛, 孙海生, 姜裕标,等. 非线性非定常气动力的模糊逻辑建模方法[J]. 实验流体力学, 2005,19(1):99-103 Liu Zhitao, Sun Haisheng, Jiang Yubiao, et al. Fuzzy logic modeling of nonlinear unsteady aerodynamics[J]. Journal of Experiments in Fluid Mechanics, 2005,19(1):99-103 (in Chinese) -
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