par Verma, Mohit ;Collette, Christophe
Référence International Conference on Vibration Problems (ICOVP), 2019(14th: 1/09/2019 - 4/09/2019), Proceedings of International Conference on Vibration Problems, ICOVP 2019
Publication Non publié, 2019-09-01
Publication dans des actes
Résumé : Drones are small unmanned aerial vehicles, often equipped with imaging system, which can be controlledremotely. During the drone flight, the camera is subjected to vibrations which hamper the quality of thecaptured images/videos. The high frequency vibrations from the drone are transmitted to the camera.Conventionally, passive rubber mounts are used to isolate the camera from the drone vibrations. The passivemounts are able provide reduction in response near the resonance. However, this comes at the cost ofamplification at the higher frequencies. This paper proposes an active vibration isolation system whichexhibits improved performance at the higher frequencies compared to the conventional system. The systemconsists of introducing an intermediate active system between the drone and the conventional system (i.e.,camera with passive rubber mounts). Experiments are carried out to characterize the drone vibrations arebeing transmitted to the camera. A test bench is developed to study the effect of these vibrations on thequality of the images captured. The quality of images captured is expressed in terms of pixel-to-signal noiseratio (PSNR). The transmissibility of the camera with passive rubber mounts is also evaluatedexperimentally. Three different isolation systems are proposed based on the degrees of freedom that needs tobe controlled. Controller architecture for the isolation systems are designed and evaluated numerically. Theresponse of the camera with passive isolation, when integrated with proposed isolation system, is found toreduce at high frequency without compromising the reduction in response at lower frequencies.