北京航空航天大学学报 ›› 2017, Vol. 43 ›› Issue (10): 1994-2002.doi: 10.13700/j.bh.1001-5965.2016.0834

• 论文 • 上一篇    下一篇

基于混合遗传算法的直升机前推/后拉配平

王巍1, 刘春1, 李东升2   

  1. 1. 沈阳航空航天大学 航空制造工艺数字化国防重点学科实验室, 沈阳 110136;
    2. 北京航空航天大学 机械工程及自动化学院, 北京 100083
  • 收稿日期:2016-10-27 修回日期:2017-02-06 出版日期:2017-10-20 发布日期:2017-03-24
  • 通讯作者: 王巍 E-mail:wangwei7832@163.com
  • 作者简介:王巍,女,博士研究生,讲师。主要研究方向:直升机飞行仿真建模技术;刘春,男,博士,教授,博士生导师。主要研究方向:飞行器仿真建模技术、虚拟现实。
  • 基金资助:
    沈阳航空航天大学国防重点学科实验室开放基金(SHSYS2015004)

Push-forward/pull-backward trim for helicopter based on hybrid genetic algorithm

WANG Wei1, LIU Chun1, LI Dongsheng2   

  1. 1. Key Laboratory of Fundamental Science for National Defense of Aeronautical Digital Manufacturing Process, Shenyang Aerospace University, Shenyang 110136, China;
    2. School of Mechanical Engineering and Automation, Beijing University of Aeronautics and Astronautics, Beijing 100083, China
  • Received:2016-10-27 Revised:2017-02-06 Online:2017-10-20 Published:2017-03-24

摘要: 针对直升机配平模型为多元且初始值难以确定的非线性方程组,以及全局最优解不唯一等问题,发展了一种基于遗传算法/拟牛顿法的高效混合迭代算法。介绍了直升机各个模块动力学方程。其中在旋翼建模中,考虑实际飞行环境下桨叶的运动和操纵特性,以动态入流和叶素法为理论基础,建立了具有配平特性的旋翼气动力模型。基于直升机飞行仿真动力学模型,详细推导了前推/后拉的配平变量和约束方程。通过构造目标函数,将全机配平问题转化为优化问题。通过计算UH-60A直升机在前推/后拉的配平解,并与飞行测试数据进行比较验证。结果表明,前推配平结果与飞行数据有偏差,后拉配平结果与飞行数据吻合。旋翼非定常气动特性是引起总距和脚蹬配平计算误差的主要原因。建立的配平算法适用于直升机不同稳定飞行条件下的仿真。

关键词: 直升机, 飞行仿真, 配平, 混合遗传算法, 前推/后拉

Abstract: To solve the problems that helicopter trim model has multivariate nonlinear equations, it is difficult to determine its initial value and the global optimal solution is non-unique, an efficient hybrid iteration algorithm is presented in this paper, which combines the genetic algorithm and the quasi-Newton method. The dynamic equations of the different modules of the helicopter are introduced. In modeling the rotor, considering characteristics of the motion and control of the rotor in the actual flight environment, an aerodynamic model of rotor based on dynamic inflow and the blade element theory with the rotor trim is established. The trim control vector and the constraint equations for push-forward/pull-backward are deduced in detail based on helicopter flight dynamic model. Since the objective function is constructed, trim problems are transformed into optimal computation. UH-60A helicopter in the push-forward/pull-backward flight is trimmed, and the trim results are compared with flight test data. It is shown that the pull-backward results agree well with flight data, and there is the discrepancy between the push-forward results and flight data. The primary contribution to the discrepancy of the trim of collective and pedal comes from inaccurate prediction of the unsteady aerodynamic characteristics of the rotor. It is a universal method that can be applied to helicopter trim simulation of different stable flight conditions.

Key words: helicopter, flight simulation, trim, hybrid genetic algorithm, push-forward/pull-backward

中图分类号: 


版权所有 © 《北京航空航天大学学报》编辑部
通讯地址:北京市海淀区学院路37号 北京航空航天大学学报编辑部 邮编:100191 E-mail:jbuaa@buaa.edu.cn
本系统由北京玛格泰克科技发展有限公司设计开发