Abstract
A gust perturbation alleviation control method based on a real-time pressure sensor is proposed. Pressure measurement provides phase-advance information on external disturbance, while the conventional inertial measurement cannot. Two pairs of pressure sensors embedded on the main wing surfaces are employed to estimate the disturbance of gust-induced rolling moment. The estimated rolling moment is incorporated into a traditional flight controller as an additional feedforward channel. The simulation results show that the additional information on flow field is helpful and that the composite controller’s architecture is more effective for alleviating gust perturbation than the conventional ones.
Highlights
Various varieties of unmanned aerial vehicles (UAVs) are increasingly common in daily life, especially the small ones, such as selfie quadrotor, delivery drone, power line inspection flying robot, and forest fire alarm unmanned flight vehicle
Its frequent crash incidents indicate that the traditional flight control strategies designed for a conventional large aircraft are not suitable for small unmanned aerial vehicle (SUAV)’s flight control due to its low-speed, lightweight, coarse sensor, and low-cost actuator [2]
A SUAV is susceptible to rolling motion; this paper proposes a pressure sensorbased gust perturbation alleviation composite control architecture, as shown in Figure 3, which is made up of the conventional inertial sensor-based feedback channel and the additional pressure-sensing feedforward channel
Summary
Various varieties of unmanned aerial vehicles (UAVs) are increasingly common in daily life, especially the small ones, such as selfie quadrotor, delivery drone, power line inspection flying robot, and forest fire alarm unmanned flight vehicle. Researchers and engineers propose hundreds of methods to improve an SUAV’s flight performance [2,3,4]. Some researchers get their inspirations from the nature, such as flying creatures like birds and insects which are capable of high-performance flight. Pressure sensors throughout the wing surfaces can provide accurate moment estimates under hover and forward-flight conditions and enhance the real-time pitch and yaw control [7]. Araujo-Estrada et al tested two SUAV platforms embedded with strain sensors and pressure sensors Their advantages include stall detection, gust mitigation, and aerodata measurement are revealed [8]. The linear and nonlinear control simulation results demonstrate the feasibility of the gust perturbation alleviation control method
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