北京航空航天大学学报 ›› 2009, Vol. 35 ›› Issue (11): 1315-1319.

• 论文 • 上一篇    下一篇

基于逆动力学和重心估计的飞行控制系统设计

张 晶, 申功璋, 杨凌宇   

  1. 北京航空航天大学 自动化科学与电气工程学院, 北京 100191
  • 收稿日期:2008-10-28 出版日期:2009-11-30 发布日期:2010-09-16
  • 作者简介:张 晶(1982-),女,河北保定人,博士生,jijizhj1982@163.com.
  • 基金资助:

    航空科学基金资助项目(20060718001)

Design of flight control system based on inverse dynamics and center of gravity estimation

Zhang Jing, Shen Gongzhang, Yang Lingyu   

  1. School of Automation Science and Electrical Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China
  • Received:2008-10-28 Online:2009-11-30 Published:2010-09-16

摘要: 飞机飞行中重心的变化直接影响飞机本身的控制特性,使得控制系统设计更为复杂.提出了一种基于逆动力学和重心估计的飞行控制方法,首先建立了考虑重心偏移的飞机六自由度动力学模型,由此模型推导得到了其逆特性的解析形式,并采用基于重量分布的重心估计系统在线提供重心信息.仿真结果表明,该方法有效地利用了重心在线估计信息,能适应飞机在不同重心时运动特性的变化,具有良好的控制效果,且设计过程简洁,易于实现.

Abstract: Due to the center of gravity varying over a specified range, the aircraft may deviate from its known dynamics, thus bringing special problems to the attitude control system. A synthesis approach based on in-flight estimation of center of gravity position and the inverse dynamics was proposed. First of all, a six degree-of-freedom flight dynamics model of aircraft with center of gravity offset was built. Based on the above model, the inverse dynamics in analytical form was obtained by deducting the dynamic equation. The estimation of center of gravity location could be obtained by the initial and updated weight data. As in-flight estimation of the center of gravity position could be utilized effectively, the simulation results demonstrate good control performance under various possible conditions of center of gravity offset. The proposed method is also clear and easy to implement.

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