Aircraft perching; Extended Kalman filter; Position sensing diode; Vision-based navigation; Optimal trajectories; Position sensing; Sensor measurements; Source directions; Spatial requirements; Trajectory length; Vision based navigation; Vision-based navigation system; Software; Control and Systems Engineering; Mechanical Engineering; Industrial and Manufacturing Engineering; Artificial Intelligence; Electrical and Electronic Engineering
Abstract :
[en] This paper presents the investigation of the use of position-sensing diode (PSD) - a light source direction sensor - for designing a vision-based navigation system for a perching aircraft. Aircraft perching maneuvers mimic bird’s landing by climbing for touching down with low velocity or negligible impact. They are optimized to reduce their spatial requirements, like altitude gain or trajectory length. Due to disturbances and uncertainties, real-time perching is realized by tracking the optimal trajectories. As the performance of the controllers depends on the accuracy of estimated aircraft state, the use of PSD measurements as observations in the state estimation model is proposed to achieve precise landing. The performance and the suitability of this navigation system are investigated through numerical simulations. An optimal perching trajectory is computed by minimizing the trajectory length. Accelerations, angular-rates and PSD readings are determined from this trajectory and then added with experimentally obtained noise to create simulated sensor measurements. The initial state of the optimal perching trajectory is perturbed, and by assuming zero biases, extended Kalman filter is implemented for aircraft state estimation. It is shown that the errors between estimated and actual aircraft states reduce along the trajectory, validating the proposed navigation system.
Disciplines :
Aerospace & aeronautics engineering
Author, co-author :
DASARI, Mohan ; University of Luxembourg > Interdisciplinary Centre for Security, Reliability and Trust (SNT) > Automation
Yanhua, Wu; School of Mechanical and Aerospace Engineering, Nanyang Technological University, Singapore, Singapore
External co-authors :
yes
Language :
English
Title :
A Vision-Based Navigation System for Perching Aircraft
The authors of this paper would like to thank Dr. Avishy Carmi for his guidance in the selection of the sensors for the navigation system. The authors would also like to thank Mohammad Alsharif and Dr. Yunus Emre Arslantas for providing the IMU noise measurements.
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