摘要
针对四旋翼无人机存在外部干扰的问题,提出了一种基于非线性干扰观测器的非奇异终端滑模控制策略,以保证系统的安全性和可靠性。首先,建立考虑外部干扰的四旋翼无人机动力学模型;其次,设计一种非线性干扰观测器来估计外部干扰的实际值,并结合非奇异终端滑模与反演技术,确保位置和姿态系统能在有限时间内收敛于期望轨迹;最后,通过仿真对比实验,表明所提出的控制方法具有良好的跟踪性能和抗干扰能力,并且其稳定性和鲁棒性均优于传统的滑模控制方法。
A Non-singular Terminal Sliding Mode Control(NTSMC)strategy based on a non-linear disturbance observer is proposed for addressing the quadrotor UAV with external disturbances,ensuring the safety and reliability of the system.Firstly,the quadrotor UAV dynamics model considering external disturbance is established.Secondly,a nonlinear disturbance observer is designed to estimate the actual value of the external disturbance and combined with the non-singular terminal sliding mode with a backstepping technique to ensure that the position and attitude system can converge to the desired trajectory in a finite time.Finally,the simulation and comparison experiments show that the proposed control method has good tracking performance and anti-disturbance ability,and its stability and robustness are better than the traditional Sliding Mode Control(SMC)method.
作者
陈宝玉
CHEN Baoyu(Phoenix Contact,Nanjing 210000,China)
出处
《计算机应用文摘》
2024年第7期90-97,100,共9页
Chinese Journal of Computer Application
关键词
四旋翼无人机
非线性观测器
滑模控制
非奇异终端滑模
欠驱动系统
quadrotor UAV
nonlinear disturbance observer
Sliding Mode Control
nonsingular terminal sliding mode
underactuated system
