Lorenzo Peretto
Camera motion compensation for enabling structural dynamic measurements from unmanned aerial vehicles.
Rel. Cecilia Surace, Marco Civera, Alessandro Sabato. Politecnico di Torino, Master of science program in Mechatronic Engineering, 2023
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Abstract
The use of cameras has gained popularity in the engineering world due to their ease of use and non-contact nature. The combined use of cameras and unmanned aerial vehicles (UAVs) allows performing complex acquisition in hard-to-reach locations. However, due to the motion of the UAV, measurements can be inaccurate. This study focuses on the mitigation of UAV-induced motion, with the aim of enhancing the measurement precision for structural dynamic assessment by proposing a combination of sensor-based and algorithm-based camera motion compensation approaches. The sensor-based approach relies on the use of a novel system integrating an Inertial Measurement Unit and two laser distance sensors to reduce the low-frequency components of the motion.
An Extended Kalman Filter algorithm is then implemented to improve the accuracy of five out of the six degrees of freedom of motion
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