Byung-Cheol Min

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This research deals with an altitude controller of a quadrotor type UAV with an unknown total mass of the structure. We assume that the uncertainty results from the flight mission in which the UAV carries unknown payloads. Since the quadrotor type UAV involves both translational and rotational motions due to its inherent dynamics, it is of importance to(More)
In this paper, we present the design of a networked robotic system capable of enhancing wireless communication capabilities. The core of the system is active antenna tracking with directional antennas. The proposed system is decentralized and consists mainly of a mobile robot system and a command center system. Each system is equipped with off-the-shelf(More)
In our previous work, we presented autonomous, self-organizing wireless networks using multiple mobile robots, which enabled the desired wireless coverage in the form of a mesh network and a point-to-point network. Capacities to cover the desired area using multiple robots, all carrying omnidirectional antennas, were demonstrated. However, the use of(More)
GPS is a technology that allows for accurate tracking of various parameters, namely speed and location. These parameters are important to many applications, such as autonomous vehicles. In order to make a successful autonomous vehicle, it is necessary to be able to quantify its performance. Tracking a vehicle with GPS is an effective, well-established way(More)
Models of communications in heterogeneous systems support exchange between agents of different types. A key component is making the heterogeneous agents appear indistinguishable to and from each other in terms of language, to normalize communication. A goal is to act as an open system, where the agents can come and exit as needed by the requirements of the(More)
Dynamic changes can present significant challenges for visually impaired travelers to safely and independently navigate urban environments. To address these challenges, we are developing the NavPal suite of technology tools [1]. NavPal includes a dynamic guidance tool [2] in the form of a smartphone app that can provide real-time instructions based on(More)
Humans will replace human labor with new robotics technologies, especially where humans can be placed in danger situations or task domains. Evolving sensor and robotic technologies allow the transfer of humans from mundane, dangerous or difficult tasks, leaving robots to apply their specific capabilities to replace human's daily routines or hazardous tasks.(More)