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UAV longitudinal aerodynamic optimization design and control system
Author: ChenXiaoKun
Tutor: HouZhongXi
School: National University of Defense Science and Technology
Course: Aeronautical and Astronautical Science and Technology
Keywords: UAV Control Systems Aerodynamic layout Optimization Flying qualities
CLC: V279
Type: Master's thesis
Year: 2011
Downloads: 107
Quote: 0
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Abstract
As compared to UAVs and manned aircraft has unique advantages, from the beginning of this century , has been tremendous development unmanned aircraft . UAV flying qualities may reflect the degree of difficulty to complete the mission , good flying qualities is to ensure the successful completion of UAV flight safety and mission established an important guarantee for the UAV flying qualities has not yet been a clear evaluation standards, can only refer to manned aircraft , which has been unable to meet the current UAV development . Kinetic models and aerodynamic parameters are analyzed based UAV flying qualities , CFD numerical simulation is to calculate the airfoil , wing and other aerodynamic characteristics of the important means. UAV requires shorter development cycles , lower R \u0026 D costs , the traditional serial overall optimization method cumbersome and costly , is not suitable for designing UAVs. In this paper, in order to control the UAV longitudinal aerodynamic optimization design with the theme , carried out the following tasks: ( a ) starting from Newtonian mechanics , the establishment of six degrees of freedom dynamic model of UAV by small perturbations linearization and decoupling separation deduced longitudinal motion equation . ( 2 ) by means of CFD numerical simulation , has been a UAV wing aerodynamic characteristics and peaceful tail aerodynamic derivatives . ( 3 ) describes the concept of stability UAV , UAV flying qualities studied the method of calculating the longitudinal plane of the UAV long cycle , short cycle modal analysis conducted in-depth research, design the pitch channel control law . ( 4 ) in some reasonable assumptions based on the quality of constraint -based flight control and aerodynamic optimization methods to achieve quality in meeting a flight under the premise of making horizontal tail drag and tailboom smallest multi-objective structural quality optimized. Finally, a UAV optimized proved that this method can play the effect of optimization .
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