华中科技大学学报（自然科学版）Issue(1)：98-102,5.DOI:10.13245/j.hust.140121
基于IDRA法的直升机动力学建模
摘要
Abstract
In order to speed up the algorithm of helicopter dynamics model,based on Lagrange equa-tion,treating micro displacements and rotating angles of airframe in a simulation step as generalized coordinates ,an IDRA (infinitesimal displacements and rotation angle)approach for helicopter dynam-ics modelling was presented,which simplified transformation matrixes of airframe coordinates be-tween adjacent simulation steps.In this way,the CPU computing time was greatly saved.Mean-while,each tyre of helicopter was viewed as three-dimensional linear springs with viscous dampings, and its potential energy,kinetic energy and energy dissipation of airframe were expressed in the pres-ented generalized coordinates.So,the dynamic model of airframe which involved flight as well as landing was established.Experimental results show that IDRA approach can save 1/3 amount of CPU time that was spent in computing compared with the traditional approach and transition curves be-tween flight and landing are reasonable,which can verify the relilability and real-time of the method.关键词
动力学建模/直升机/实时性/拉格朗日方程/飞行/着陆Key words
dynamics modeling/helicopter/real-time/Lagrange equation/flight/landing分类
信息技术与安全科学引用本文复制引用
栗英杰,赵丁选,李保中,孟广伟..基于IDRA法的直升机动力学建模[J].华中科技大学学报（自然科学版）,2014,(1):98-102,5.基金项目
吉林省教育厅“十二五”科学技术研究项目（2012505）． （）
