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 controlled remotely. During the drone flight, the camera is subjected to vibrations which hamper the quality of the captured 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 passive mounts are able provide reduction in response near the resonance. However, this comes at the cost of amplification at the higher frequencies. This paper proposes an active vibration isolation system which exhibits improved performance at the higher frequencies compared to the conventional system. The system consists 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 are being transmitted to the camera. A test bench is developed to study the effect of these vibrations on the quality of the images captured. The quality of images captured is expressed in terms of pixel-to-signal noise ratio (PSNR). The transmissibility of the camera with passive rubber mounts is also evaluated experimentally. Three different isolation systems are proposed based on the degrees of freedom that needs to be controlled. Controller architecture for the isolation systems are designed and evaluated numerically. The response of the camera with passive isolation, when integrated with proposed isolation system, is found to reduce at high frequency without compromising the reduction in response at lower frequencies.

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