Now showing items 1-20 of 36

    • 3D Obstacle Avoidance in Adversarial Environments for Unmanned Aerial Vehicles. 

      Geyer, Mark S.; Johnson, Eric N. (Georgia Institute of TechnologyAmerican Institute of Aeronautics and Astronautics, 2006-08)
      As unmanned aerial vehicles (UAVs) are considered for a wider variety of military and commercial applications, the ability to navigate autonomously in unknown and hazardous environments is increasingly vital to the ...
    • Adaptive Flight Control for an Autonomous Unmanned Helicopter 

      Johnson, Eric N.; Kannan, Suresh K. (Georgia Institute of TechnologyAmerican Institute of Aeronautics and Astronautics, 2002-08)
      For autonomous helicopter flight, it is common to separate the flight control problem into an innerloop that controls attitude and an outerloop that controls the trajectory of the helicopter. The outerloop generates ...
    • Adaptive Guidance and Control for Hypersonic Vehicles 

      Johnson, Eric N.; Calise, Anthony J.; Curry, Michael D. (Georgia Institute of TechnologyAmerican Institute of Aeronautics and Astronautics, Inc., 2006-05)
      Guidance and control technology is recognized as an important aspect of the military, civil, and commercial goal of reliable, low-cost, aircraft-type operations into space. Here, several guidance and control methods ...
    • Adaptive Output Feedback Control of a Flexible Base Manipulator 

      Yang, Bong-Jun; Calise, Anthony J.; Craig, James I. (Georgia Institute of TechnologyAmerican Institute of Aeronautics and Astronautics, Inc., 2007-07)
      This paper considers augmentation of an existing inertial damping mechanism by neural network-based adaptive control, for controlling a micromanipulator that is serially attached to a macromanipulator. The approach ...
    • Adaptive Position and Attitude-Tracking Controller for Satellite Proximity Operations Using Dual Quaternions 

      Filipe, Nuno; Tsiotras, Panagiotis (Georgia Institute of Technology, 2015)
      This paper proposes a nonlinear adaptive position and attitude tracking controller for satellite proximity operations between a target and a chaser satellite. The controller requires no information about the mass and inertia ...
    • Adaptive Trajectory Control for Autonomous Helicopters 

      Johnson, Eric N.; Kannan, Suresh K. (Georgia Institute of TechnologyAmerican Institute of Aeronautics and Astronautics, Inc., 2005)
      For autonomous helicopter flight, it is common to separate the flight control problem into an inner loop that controls attitude and an outer loop that controls the translational trajectory of the helicopter. In previous ...
    • An Adaptive Vision-Based Approach to Decentralized Formation Control 

      Sattigeri, Ramachandra J.; Calise, Anthony J.; Evers, Johnny H. (Georgia Institute of TechnologyAmerican Institute of Aeronautics and Astronautics, Inc., 2004-12)
      In considering the problem of formation control in the deployment of intelligent munitions, it would be highly desirable, both from a mission and a cost perspective, to limit the information that is transmitted between ...
    • Adaptive, Integrated Guidance and Control Design for Line-of-Sight-Based Formation Flight 

      Kim, Byoung Soo; Calise, Anthony J.; Sattigeri, Ramachandra J. (Georgia Institute of TechnologyAmerican Institute of Aeronautics and Astronautics, Inc., 2007-10)
      This paper presents an integrated guidance and control design for formation flight using a combination of adaptive output feedback and backstepping techniques. We formulate the problem as an adaptive output feedback ...
    • Augmenting Adaptive Approach to Control of Flexible Systems 

      Calise, Anthony J.; Yang, Bong-Jun; Craig, James I. (Georgia Institute of TechnologyAmerican Institute of Aeronautics and Astronautics, Inc., 2004)
      This paper describes an approach for augmenting a linear controller design with a neural-network-based adaptive element. The basic approach involves formulating an architecture for which the associated error equations have ...
    • Autonomous Flight in GPS-Denied Environments Using Monocular Vision and Inertial Sensors 

      Wu, Allen D.; Johnson, Eric N.; Kaess, Michael; Dellaert, Frank; Chowdhary, Girish (Georgia Institute of TechnologyAmerican Institute of Aeronautics and Astronautics, 2013-04)
      A vision-aided inertial navigation system that enables autonomous flight of an aerial vehicle in GPS-denied environments is presented. Particularly, feature point information from a monocular vision sensor are used to ...
    • Collaborative Mapping and Search for Autonomous Helicopters 

      Johnson, Eric N.; Magree, Daniel P.; Mooney, John G.; White, Matthew; Hartman, Jonathan; Sahasrabudhe, Vineet (Georgia Institute of Technology, 2013-05)
      This paper describes recent results from a partnership between the Sikorsky Aircraft Corporation and the Georgia Institute of Technology to develop, improve, and flight test a multi-aircraft collaborative architecture, ...
    • A Compact Guidance, Navigation, and Control System for Unmanned Aerial Vehicles 

      Christophersen, Henrik B.; Pickell, R. Wayne; Neidhoefer, James C.; Koller, Adrian A.; Kannan, Suresh K.; Johnson, Eric N. (Georgia Institute of TechnologyAmerican Institute of Aeronautics and Astronautics, Inc., 2006-05)
      The Flight Control System 20 (FCS20) is a compact, self-contained Guidance, Navigation, and Control system that has recently been developed to enable advanced autonomous behavior in a wide range of Unmanned Aerial Vehicles ...
    • A Comparison of Automatic Nap-of-the-Earth Guidance Strategies for Helicopters 

      Johnson, Eric N.; Mooney, John G. (Georgia Institute of Technology, 2014-05)
      This paper describes updated results from a partnership between the Sikorsky Aircraft Corporation and the Georgia Institute of Technology to develop, improve, and flight test a sensor, guidance, navigation, control, and ...
    • Development and Test of Highly Autonomous Unmanned Aerial Vehicles 

      Johnson, Eric N.; Proctor, Alison A.; Ha, Jin-Cheol; Tannenbaum, Allen R. (Georgia Institute of TechnologyAmerican Institute of Aeronautics and Astronautics, Inc., 2004-12)
      This paper describes the design, development, and testing of Unmanned Aerial Vehicles (UAV) with highly automated search capabilities. Here, systems are able to respond on their own in the presence of considerable uncertainty ...
    • Feedback Navigation in an Uncertain Flow Field and Connections with Pursuit Strategies 

      Bakolas, Efstathios; Tsiotras, Panagiotis (Georgia Institute of TechnologyAmerican Institute of Aeronautics and Astronautics, 2012)
      This paper presents several classes of control laws for steering an agent, that is, an aerial or marine vehicle, in the presence of a both temporally and spatially varying drift field induced by local winds/currents. The ...
    • Flight Test Results of Autonomous Fixed-Wing Transition to and from Stationary Hover 

      Johnson, Eric N.; Turbe, Michael A.; Wu, Allen D.; Kannan, Suresh K.; Neidhoefer, James C. (Georgia Institute of TechnologyAmerican Institute of Aeronautics and Astronautics, 2008-03)
      Linear systems can be used to adequately model and control an aircraft in either ideal steady-level flight or in ideal hovering flight. However, constructing a single unified system capable of adequately modeling or ...
    • Flight Testing of Nap of-the-Earth Unmanned Helicopter Systems 

      Johnson, Eric N.; Mooney, John G.; Ong, Chester; Sahasrabudhe, Vineet; Hartman, Jonathan (Georgia Institute of Technology, 2011-05)
      This paper describes recent results from a partnership between the Sikorsky Aircraft Corporation and the Georgia Institute of Technology to develop, improve, and flight test a sensor, guidance, navigation, control, ...
    • Flight-Test Results of Autonomous Airplane Transitions Between Steady-Level and Hovering Flight 

      Johnson, Eric N.; Wu, Allen D.; Neidhoefer, James C.; Kannan, Suresh K.; Turbe, Michael A. (Georgia Institute of Technology, 2008-03)
      Linear systems can be used to adequately model and control an aircraft in either ideal steady-level flight or in ideal hovering flight. However, constructing a single unified system capable of adequately modeling or ...
    • High Performance Nap-of-the-Earth Unmanned Helicopter Flight 

      Johnson, Eric N.; Mooney, John G.; Ong, Chester; Sahasrabudhe, Vineet; Hartman, Jonathan (Georgia Institute of Technology, 2011)
      This paper describes recent results from a partnership between the Sikorsky Aircraft Corporation and the Georgia Institute of Technology to develop, improve, and flight test a sensor, guidance, navigation, control, and ...
    • HTS Motors in Aircraft Propulsion: Design Considerations 

      Masson, Philippe J.; Soban, Danielle Suzanne; Upton, Eric George; Pienkos, Jules E.; Luongo, Cesar A. (Georgia Institute of TechnologyInstitute of Electrical and Electronics Engineers, Inc., New York, 2005-06)
      Current high temperature superconducting (HTS) wires exhibit high current densities enabling their use in electrical rotating machinery. The possibility of designing high power density superconducting motors operating at ...