| 模态集结法及其在飞行力学中的应用 |
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| 引用本文： | 韩潮.模态集结法及其在飞行力学中的应用[J].航空学报,1989,10(6):237-245. |
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| 作者姓名： | 韩潮 |
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| 作者单位： | 北京航空航天大学 |
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| 摘 要： | 本文给出一种处理线性系统降阶的集结方法,并根据该方法将飞机纵向运动方程和横侧向运动方程进行降阶分解,得到了飞机的沉浮、短周期、滚转-螺旋和荷兰滚运动模态的各近似式,结果表明本文中的各近似式精度较好,特别是提高了沉浮及荷兰滚阻尼的估计精度。
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| 关 键 词： | 模态集结法 飞机运动模态 纵向运动 横侧向运动 |
| 收稿时间： | 1988-06-01; |
MODAL AGGREGATION AND ITS APPLICATION IN FLIGHT MECHANICS |
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| Beijing University of Aeronautics and AstronauticsHan Chao.MODAL AGGREGATION AND ITS APPLICATION IN FLIGHT MECHANICS[J].Acta Aeronautica et Astronautica Sinica,1989,10(6):237-245. |
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| Authors: | Beijing University of Aeronautics and AstronauticsHan Chao |
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| Institution: | Beijing University of Aeronautics and AstronauticsHan Chao |
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| Abstract: | This paper presents one kind of aggregation for linear system modal reduction. The aggregational matrix of reduced system is given bythe solution of a general Lyapunov equation——SA11-A22S-A21 =0,in whichA11, A21 and A22 are the block matrices of the parameter matrix of initial linear system. Matrix （-S I） is the aggregational matrix. Then, by means of the method given above, the linearized dynamic equations of longitudinal motion and lateral-directional motion of aircraft are separated, and the approximate formulas of phugoid, short period, roll-spiral and Dutch-roll modes are derived. Some calculation results show that the approximate formulas have a goad precision, espscially increasing the estimation accuracy for the dampings of phugoid and Dutch-roll modes. |
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| Keywords: | modal aggregation modes of aircraft longitudinal motion lateral-directional motion |
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