航空学报 > 2026, Vol. 47 Issue (9): 532278-532278   doi: 10.7527/S1000-6893.2025.32278

先进飞行器安全控制技术专刊

基于固定时间干扰观测器的空中机器人非奇异终端滑模控制

赵静1(), 潘龙1, 陆宁云2, 黄海云1, 马亚杰2, 徐丰羽1   

  1. 1.南京邮电大学 自动化学院,南京 210023
    2.南京航空航天大学 自动化学院,南京 210016
  • 收稿日期:2025-05-22 修回日期:2025-07-29 接受日期:2025-11-03 出版日期:2026-05-15 发布日期:2025-11-10
  • 通讯作者: 赵静 E-mail:zhaojing@njupt.edu.cn
  • 基金资助:
    直升机动力学全国重点实验室基金(2024-ZSJ-LB-02-05);航空航天结构力学及控制全国重点实验室基金(MCMS-E-0123G04)

A novel nonsingular terminal sliding mode control for aerial robot based on fixed-time disturbance observer

Jing ZHAO1(), Long PAN1, Ningyun LU2, Haiyun HUANG1, Yajie MA2, Fengyu XU1   

  1. 1.College of Automation,Nanjing University of Posts and Telecommunications,Nanjing 210023,China
    2.College of Automation Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China
  • Received:2025-05-22 Revised:2025-07-29 Accepted:2025-11-03 Online:2026-05-15 Published:2025-11-10
  • Contact: Jing ZHAO E-mail:zhaojing@njupt.edu.cn
  • Supported by:
    Foundation of National Key Laboratory Foundation of Helicopter Aeromechanics(2024-ZSJ-LB-02-05);Foundation of State Key Laboratory of Aerospace Structural Mechanics and Control(MCMS-E-0123G04)

摘要:

针对复合扰动下空中机器人的高精度轨迹跟踪控制问题,提出一种基于固定时间干扰观测器的滑模控制策略。首先,考虑目标抓取后重心偏移与紊流风场耦合因素,采用牛顿-欧拉公式建立六自由度动力学模型,进而设计固定时间收敛的复合干扰观测器进行扰动估计。其次,针对位置控制子系统,设计基于新型趋近律的非奇异快速终端滑模控制器,可以有效避免系统陷入奇异状态,同时提升系统的动态响应性能;针对姿态控制子系统,提出融合积分反步法的混合控制策略,能够增强系统鲁棒性以应对外部干扰。最后,经过仿真对比验证所提方法的有效性。

关键词: 固定时间干扰观测器, 非奇异快速终端滑模控制, 抗扰控制, 重心偏移, 空中机器人

Abstract:

To address the high-precision trajectory tracking control problem for aerial robot under compound disturbances, this paper proposes a sliding mode control strategy based on a fixed-time disturbance observer. First, considering the coupled effects of centroid offset after target grasping and turbulent wind fields, a six-degree-of-freedom dynamic model is established using the Newton-Euler formula and design a fixed-time convergent compound disturbance observer for disturbance estimation. Second, for the position control subsystem, a nonsingular fast terminal sliding mode controller based on a novel reaching law is designed, which can effectively avoid the system falling into a singular state while enhancing the system’s dynamic response performance. For the attitude control subsystem, a hybrid control strategy integrating integral backstepping is proposed to improve the system robustness against external disturbances. Finally, simulation comparisons are conducted to validate the effectiveness of the proposed approach.

Key words: fixed-time disturbance observer, nonsingular fast terminal sliding mode control, anti-disturbance control, centroid offset, aerial robot

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