• 论文 •

### 重型直升机-吊挂耦合系统闭环飞行品质分析

1. 北京航空航天大学 航空科学与工程学院, 北京 100083
• 收稿日期:2015-07-01 出版日期:2016-07-20 发布日期:2016-07-29
• 通讯作者: 曹义华,Tel.: 010-82339537 E-mail: yihuacaobu@126.com E-mail:yihuacaobu@126.com
• 作者简介:朱笑宇 女,硕士研究生。主要研究方向:直升机飞行力学与控制。Tel: 15210967669 E-mail: zhuxiaoyu@buaa.edu.cn;曹义华 男,博士,教授,博士生导师。主要研究方向:直升机总体设计。Tel: 010-82339537 E-mail: yihuacaobu@126.com

### Heavy helicopter-slung-load coupling system flying qualities in closed-loop state

ZHU Xiaoyu, CAO Yihua, CAO Long

1. School of Aeronautic Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100083, China
• Received:2015-07-01 Online:2016-07-20 Published:2016-07-29

Abstract: Flying qualities of a heavy helicopter augmented with an automatic flight control system (AFCS) and flying with externally slung loads are investigated using the mathematical model of the CH-53A/D helicopter. A nonlinear dynamical model of helicopter-slung-load in closed-loop state was built based on single mass-point hypothesis and a control system model. Under this hypothesis, extra degrees of freedom and constraints were brought in by the consideration of the slung-load, which made the set of equations of motion increased to a 13-order one. The coupling system in closed-loop state was linearized under small-perturbed conditions. After this, the slung-load flight control response characteristics in both time and frequency domain were analyzed. The effect of slung-load mass, slung-load rope length and helicopter velocity on coupling system's flight quality was analyzed according to the handling qualities requirements for military rotorcraft indicated by ADS-33E. The final results show that the slung-load mass, slung-load rope length and helicopter velocity have varying degrees of impact on the time domain features and handling qualities of the coupling system.