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To assess the radar systems in North Dakota (ND) and its surrounding areas and their ability to provide Detect and Avoid (DAA) capabilities for both manned and unmanned aircraft, a study was completed to understand their performance. This assessment will provide an evaluation of typical radar performance throughout the year, including rates of anomalous behavior. With the likely increase in airspace...
Automatic Dependent Surveillance Broadcast (ADS-B) data from the Grand Forks International Airport ground receiver was explored in this investigation. The results highlight some anomalies in the message contents including partial message loss, drop out, altitude discrepancy. The ADS-B payload data frame contains the aircraft position (latitude, longitude), altitude, aircraft status (ground/air), quality...
This paper explores the interactions between environmental conditions and edge detector performance for use as a critical function for detect and avoidance (DAA) operations in the unmanned aerial systems (UAS) industry. The goal of this study was to establish the best edge detection scheme for sunny, low light, cloudy, and foggy conditions. A laboratory test chamber was developed to simulate these...
This paper describes a method in which databases of terrain and obstacles maintained by government agencies are combined into a single database with the final goal of implementation into a sense-and-avoid algorithm currently in development at the University of North Dakota. With the new regulations set forth by the Federal Aviation Administration, strict requirements have to be met before unmanned...
This paper presents the development of a vision-based neuro-fuzzy controller for a two axes gimbal system mounted on a small Unmanned Aerial Vehicle (UAV). The controller uses vision-based object detection as input and generates pan and tilt motion and velocity commands for the gimbal in order to keep the interest object at the center of the image frame. A readial basis function based neuro-fuzzy...
Photo detectors are used to detect laser signals to support high-speed data communications for Unmanned Aerial Vehicle (UAV). However, there is one potential problem, which is the unwanted ambient light that causes detector to saturate. This is not a problem at night-time. However, at day time, the sun-light causes a D.C photo current and causes the photo detector to saturate and makes the laser signal...
Image mosaicing has been practiced in several computer vision and scientific research areas. There is a clear indication of the advancement of the state of the art of mosaicing algorithms. However, the methods of quantitative evaluation of mosaicing algorithms are still inadequate. Furthermore, a majority of the previous evaluation methodologies lack a sufficient number of performance metrics, while...
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