Organization:
Aerodynamic Decelerator Systems Center (ADSC)

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2001
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Description
Focuses on novel research topics that support technologies vital to the Army’s future force, combating terrorism and new emerging threats; Supports the development of a family of various-weight precision guided airdrop systems, which enable conventional military aircraft or autonomous vehicles to drop sensors, munitions, and/or supplies at high offsets onto the battlefield with near pinpoint accuracy, minimizing risk to the airdrop aircraft and limiting the need for ground vehicle convoys; Backs up the development and testing of a variety of fixed- and rotary-wing unmanned platforms carrying EO/IR sensors to be used in the different surveillance and reconnaissance missions; Pursues the development and implementation of interactive / automated tools / GUIs to support a variety of YPG missions, including those devoted to real-time image processing; Accelerates research results transition to real-world fielded applications; Provides YPG personnel with high-quality training in a variety of applied disciplines (computer-aided engineering; inertial navigation, navaids, GPS; communication and networking; computer vision and EO/IR imagery data processing; autonomous systems, weaponry.
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Publication Search Results

Now showing 1 - 10 of 51
  • Publication
    AGAS: Development of Affordable Guided Airdrop System Landing (12.3 Mb, 22 sec.) [video]
    (Monterey, California: Naval Postgraduate School, 2008-05-01) Naval Postgraduate School (U.S.); Aerodynamic Decelerator Systems Center; Aerodynamic Decelerator Systems Center (ADSC)
  • Publication
    On the Development of a Scalable 8-DoF Model of a Generic Parafoil-Based Delivery System
    (Monterey, California: Naval Postgraduate School, 2005) Yakimenko, Oleg; Aerodynamic Decelerator Systems Center (ADSC)
    The paper presents an initial move to develop a scalable high-degree-of-freedom model of the parafoilpayload system. The intention is to develop the tool capable of: i) determining basic systemメs geometry parameters by observing the video data of the real descend, ii) readjusting the nominal aerodynamic and control coefficients incorporated into the well-established equations of motions, and iii) performing model identification to tune numerous relative variables to achieve the best fit with the real drop data if available. Since in the certain way such a tool would represent some kind of generalization of the modeling efforts undertaken so far, the present paper starts from a comprehensive review of publications devoted to the modeling of parafoil-payload systems. The paper then briefly addressed the current stage of the development of a scalable model. In anticipation of real drop data to validate the approach paper ends with conclusions.
  • Publication
    Autonomous Video Scoring and Dynamic Attitude Measurement
    (Monterey, California: Naval Postgraduate School, 2005) Yakimenko, O.; Dobrokhodov, V.; Kaminer, I.; Aerodynamic Decelerator Systems Center (ADSC)
    The paper focuses on the development and evaluation of an autonomous payload tracking capability for determining time, state and attitude information (TSPI) of all types of airdrop loads. This automated capability of accurately acquiring TSPI data, will reduce the labor time and eliminate man-in-the-loop errors. The paper analyses the problem and then proceeds with the description of the PerceptiVU Target Tracking System (TTS) software adopted for obtaining the TSPI. The key features of this software include a choice of three basic tracking algorithms (dynamic centroid, hottest spot thresholding, dynamic correlation), capability of capturing from both standard analog video sources (such as NTSC and/or RS170) and digital video sources, control of the entire system with an off-the-shelf joystick controller. The paper further describes algorithms to be used in conjunction with the data provided by the TTS to determine systemメs state variables. A position estimation solution is based on tracking a payloadメs center (or any other predetermined point) by several cameras with known positions. A pose (position and orientation) estimation solution is based on tracking of four distinctive non-coplanar points. Pre-selected and artificially marked points on the moving target cooperatively serve as beacons, therefore providing precise measurements of the line of sign toward these points. This allows unique position and attitude estimation and no need for additional pattern recognition. In conclusion, the paper provides examples of video data processing and parameters estimation.
  • Publication
    Aerodynamic Decelerator Systems Center (archived)
    (Monterey, California: Naval Postgraduate School, 2001) Aerodynamic Decelerator Systems Center (ADSC); Aeronautics and Astronautics
    The Aerodynamic Decelerator Systems Center (ADSC) was founded in 2001 and currently pursues the following objectives: Continue supporting the Affordable Guided Airdrop System precision airdrop capability; a circular-parachute guided cargo system; Support the development of a family of various weight precision guided airdrop systems, which enable conventional military aircraft to drop sensors, munitions, and/or supplies at high-offsets onto the battlefield with near pinpoint accuracy, minimizing risk to the airdrop aircraft and limiting the need for ground vehicle convoys; Pursue the development and implementation of an autonomous payload tracking capability for determining time, 3D position, and attitude to support the modeling and system identification for all types of airdrop loads.
  • Publication
    Direct method for real-time prototyping of optimal control
    (2006) Yakimenko, Oleg A.; Aerodynamic Decelerator Systems Center (ADSC); Mechanical and Aerospace Engineering (MAE)
    This paper addresses the problem of real-time generation of near-optimal control for nonlinear plants. It advocates using the direct method of calculus of variations based on a priory approximation of the optimal solution by appropriate reference functions depending on several variable parameters and then applying inverse dynamics to determine the corresponding controls. The paper reviews general ideas of such an approach and provides with two detailed examples baased on recent graduate students' projects. These include a standard inverted pendulum control and a more complex problem aimed on the development of algorithms for cooperative collision-free control of multiple agents.
  • Publication
    A Direct Method for UAV Guidance and Control, Poster
    (2008) Whidborne, James F.; Cowling, Ian D.; Yakimenko, Oleg A.; Aerodynamic Decelerator Systems Center (ADSC)
  • Publication
    Miniature Autonomous Rocket Recovery System (MARRS)
    (Monterey, California: Naval Postgraduate School, 2011-05) Yingling, Adam J.; Hewgley, Charles W.; Seigenthaler, Thomas A.; Yakimenko, Oleg A.; Aerodynamic Decelerator Systems Center (ADSC); Mechanical and Aerospace Engineering (MAE); Electrical Engineering; Systems Engineering
    This paper discusses the development and testing of the new-generation recovery system in highpowered rockets. It starts from the overall description of the rocket system, the requirements of the Miniature Autonomous Rocket Recovery System (MARRS) and is followed by a description of a flight tested MARRS. Next, simulation and results from the flight tests are given. This paper ends with conclusions and recommendations for follow-on testing.
  • Publication
    Development of a Payload Derived Position Acquisition System for Parachute Recovery Systems
    (Monterey, California: Naval Postgraduate School, 2008) Tiaden, R.D.; Yakimenko, O.A.; Aerodynamic Decelerator Systems Center (ADSC)
  • Publication
    On the Development of a Six-Degree-of-Freedom Model of a Low-Aspect-Ratio Parafoil Delivery System
    (Monterey, California: Naval Postgraduate School, 2003) Mortaloni, P.; Yakimenko, O.; Dobrokhodov, V.; Howard, R.; Aerodynamic Decelerator Systems Center (ADSC)
    The future of the Armyメs air delivery mission includes the use of precision-guided autonomous airdrop methods to resupply troops in the field. High-glide systems, ram-air parafoil-based, allow for a safe standoff delivery as well as wind penetration. This paper addresses the development of a six-degree-of-freedom model of a low-aspect ratio controllable parafoil-based delivery system. The model is equally suitable for modeling and simulation and for the design of guidance, navigation and control (GNC) algorithms. This gliding parafoil model was developed in the MATLAB/Simulinkᆴ environment. Apparent mass and inertia effects are included in the model. Initial test cases have been run to check model fidelity.
  • Publication
    Six-Degree-of-Freedom Model of a Controlled Circular Parachute
    (2003) Dobrokhodov, Vladimir N.; Yakimenko, Oleg A.; Junge, Christopher J.; Aerodynamic Decelerator Systems Center (ADSC)
    The paper continues a series of publications devoted to modern advances in aerodynamic decelerator system technology started recently (Journal of Aircraft, Vol. 38, No. 5, 2001) and addresses the development of a sixdegree- of-freedom model of a guided circular parachute. The paper reviews existing circular parachute models and discusses several modeling issues unresolved within the frame of existing approaches or completely ignored so far. These issues include using data obtained in the aerodynamic experiments and computational- uid-dynamics modelingfor both undistorted (uncontrolled) and distorted (controlled) canopy shapes, introducing andcomputing control derivatives, and providing comparison with the real ight data. The paper provides step-by-step development of the mathematical model of circular parachute that includes the basic equations of motion, analysis and computation of the aerodynamic forces and moments, and investigation with modeling of special modes observed in ight. It then introduces a new application of a two-step aerodynamic parameters identi cation algorithm that is based on comparison with two types of the air-drop data (uncontrolled set and controlled one). The paper ends with summary of the obtained results and proposes a vital direction for the further elaboration of the developed model.