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风场扰动下植保四旋翼无人机的建模与控制

Modeling and Control of Quadrotor UAV for Plant Protection Under Wind Disturbance

  • 摘要: 由于四旋翼植保无人机的飞行高度较低,在实际飞行中易受到环境风场的影响。为此,根据Newton-Euler方程建立了风场环境下四旋翼飞行器的动力学模型,并设计了基于内外环PID控制策略的控制器。其中,姿态角控制器采用基于四元数的反馈控制器,并使用Lyapunov稳定性判据验证了其全局渐近稳定性;姿态角速率控制器采用PID控制器;位置控制器由速度PID控制器和位置P控制器组成。通过在Gazebo中进行风场模拟仿真实验和实际飞行试验,对设计的四旋翼飞行器控制系统进行参数调试和验证,结果表明:控制器具备在风场环境下控制四旋翼无人机稳定飞行的能力。

     

    Abstract: Due to the low flying altitude of plant protection drone, they are easily affected by the environmental wind field in actual flight. According to the Newton-Euler equation, the dynamic model of the quadrotor aircraft in the wind environment is established, and the controller based on the inner and outer loop PID control strategy is designed. Among them, the attitude angle controller adopts a quaternion-based feedback controller, and the Lyapunov stability criterion is used to verify its global asymptotic stability; the attitude angle rate controller adopts a PID controller; the position controller adopts a velocity PID controller and position P controller. Through the wind field simulation experiment and actual flight experiment in Gazebo, the parameters of the designed quadrotor aircraft control system are debugged and verified, and the control performance of the designed quadrotor aircraft control system under the action of natural wind field is proved. The results show that the designed controller has the ability to control the stable flight of the quadrotor in the wind field environment.

     

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