Examination of shape memory polymer-auxetic landing gears on landing approach for quadcopter

Abstract

The current work examines the perching and flight stability studies of the auxetic landing gear based on shape memory polymers. UAVs are capable of perch-and-stare missions. Most UAV perching approachesinvolve complicated maneuvering and depend on particular structures such as rough attachment walls or grasping tree branches. Perching is accomplished by integrating a compliant, underactuated gripping foot and a collapsing mechanism of the leg that converts the weight of the rotorcraft into tendon tension for passive action of the foot. In-plane isotropic in tiny deformations, the hexachiral structure. The aim of the research is, however, to enhance the two shock absorption properties and the flight dynamic features without substantially affecting efficient yield stress, with important material and a substantial deformity, but also to enhance the hexachiral structure, if exposed to big plastic elastomastic deformation.Tests were conducted on shock absorbance, aerodynamic stability and perched landing characteristics to ensure the stability over dynamic imbalance. Results indicate the minimal force could be achieved with the use of auxetic gripper with a difference of 27.6% over the plain gripper. Also the steady state of pitch, yaw and roll moments could be achieved in the system while perching with a difference of 14.5% in comparison with plain gripper. This novel design ensures the deformation of maximum perching desirability on curvature with the difference of 35.8% in comparison with the plain gripper.