CAJ | 학술논문

对机翼损伤无人机的飞行动力学进行分析，重点分析左翼不同程度面积矩损伤对大侧滑飞行操稳特性的影响规律。首先给出重心偏移、新增转动惯量和耦合气动导数在不同程度损伤下的变化规律；其次通过损伤特征根对飞行运动模态的变化情况进行分析；接下来给出损伤对部分通道时域暂态响应的影响，以及如何改善操纵性的方法。最后通过频响分析总结出增强损伤机体辨识精度的途径。分析结果表明：随损伤程度增大，典型运动模态逐渐变化，特征根有规律移动；时域响应高频振荡成分减小，低频成分增大，稳态值逐渐增大直到发散；耦合通道的频响具有全部运动模态信息，能对损伤飞机的系统辨识提供额外信息。
대궤익손상무인궤적비행동역학진행분석，중점분석좌익불동정도면적구손상대대측활비행조은특성적영향규률。수선급출중심편이、신증전동관량화우합기동도수재불동정도손상하적변화규률；기차통과손상특정근대비행운동모태적변화정황진행분석；접하래급출손상대부분통도시역잠태향응적영향，이급여하개선조종성적방법。최후통과빈향분석총결출증강손상궤체변식정도적도경。분석결과표명：수손상정도증대，전형운동모태축점변화，특정근유규률이동；시역향응고빈진탕성분감소，저빈성분증대，은태치축점증대직도발산；우합통도적빈향구유전부운동모태신식，능대손상비궤적계통변식제공액외신식。
This paper presents an analysis on flight dynamics of wing-damaged UAV, especially on the regularity that damage of left wing in different grades influence stability and handling performance at high sideslip angle. First, the analysis shows the changes of mass point position, new moment of inertia, coupled aero-derivatives due to damage. Then it analyzes the variations of motion modes using eigenvalues after damage. Next, differences in the time transient response of some control channels among varying degrees of damage are illustrated and the method for enhancing handling performance is also discussed. Finally the way through frequency domain analysis for improving identification precision of damaged plant is simply given. The results and their analysis show preliminarily that when damaged area expands, all motion modes and corresponding eigenvalues are changed regularly. The components of high and low frequency are increased and decreased respectively and steady-state values increase gradually until di-vergence. Signals of coupled channels in frequency response include information about all motion modes and provide additional knowledge for the system identification of damaged plant.