Last edited by Nikolmaran
Saturday, November 21, 2020 | History

3 edition of Passive range estimation for rotorcraft low-altitude flight found in the catalog.

Passive range estimation for rotorcraft low-altitude flight

Passive range estimation for rotorcraft low-altitude flight

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  • 24 Currently reading

Published by National Aeronautics and Space Administration, Ames Research Center, For sale by the National Technical Information Service in Moffett Field, Calif, [Springfield, Va .
Written in English

    Subjects:
  • Computer vision.,
  • Low altitude aeronautics.

  • Edition Notes

    StatementB. Sridhar, R. Suorsa, and B. Hussien.
    SeriesNASA technical memorandum -- 103897.
    ContributionsSuorsa, Raymond E., Hussien, B., Ames Research Center.
    The Physical Object
    FormatMicroform
    Pagination1 v.
    ID Numbers
    Open LibraryOL15355871M

    For the latter, we demonstrate the integration of obstacle data and flight data records to evaluate collision risk, a critical safety issue in low-altitude rotorcraft operations, latent in a given. A helicopter main rotor or rotor system is the combination of several rotary wings (rotor blades) and a control system that generates the aerodynamic lift force that supports the weight of the helicopter, and the thrust that counteracts aerodynamic drag in forward flight.


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Passive range estimation for rotorcraft low-altitude flight Download PDF EPUB FB2

The automation of rotorcraft low-altitude flight presents challenging problems in control, computer vision and image understanding. An illustration of an open book. Books. An illustration of two cells of a film strip. Video Passive range estimation for rotorcraft low-altitude flight. Passive range estimation for rotorcraft low-altitude flight Article (PDF Available) in Machine Vision and Applications 6(1) February with 31 Reads How we measure 'reads'.

The automation of rotorcraft low-altitude flight presents challenging problems in control, computer vision, and image understanding. A critical element in this problem is the ability to detect Cited by: Get this from a library.

Passive range estimation for rotorcraft low-altitude flight. [B Sridhar; Raymond E Suorsa; B Hussien; Ames Research Center.]. Passive Range Estimation for Rotorcraft Low-Altitude Flight B.

Sridhar, R. Suorsa, and B. Hussien (NASA-IM-I) PASSIV_ RANGE ESTIMATION FOR ROTORCRAFT LOW-ALTITUdE FLIGHT. Passive range estimation for rotorcraft low-altitude flight The automation of rotorcraft low-altitude flight presents challenging problems in control, computer vision and image understanding.

A critical. This report is the last of a series of three reports that address rotorcraft Passive range estimation for rotorcraft low-altitude flight book altitude benefit/cost analysis.

The other two are: 1) Rotorcraft Low Altitude CNS Benefit/Cost Analysis: Operations Data, DOT/FAA/DS/9, and 2) Rotorcraft Low Altitude. CiteSeerX - Document Details (Isaac Councill, Lee Giles, Pradeep Teregowda): Airbome vehcles such as rotorcraft must avoid obsta-cles such as antennas, towers, poles, fences, tree branches, and wires strung across the flight path.

This paper analyzes the requirements of an obstacle detection system for rotorcrafts in low-altitude Nap-of-the-Earth flight based on various rotorcraft. Rotorcraft Low-Altitude Flight, American Helicopter Society Meeting on Automation Applications of Rotorcraft, Atlanta, GA, AprilSridhar, B., and Phatak, A.

V., Kalman Filter Based Range Estimation. An airborne vehicle such as a rotorcraft must avoid obstacles like antennas, towers, poles, fences, tree branches, and wires strung across the flight path. Automatic detection of the obstacles and generation of appropriate guidance and control actions for the vehicle to avoid these obstacles would facilitate autonomous navigation.

The requirements of an obstacle detection system for rotorcraft. An account is given of the methodology used to develop a data base containing low altitude imagery, augmented with the rotorcraft and sensor parameters required for passive-range estimation. The bata base is predicated on flight test data encompassing imagery, rotorcraft and sensor parameters, and ground truth range.

The automation of rotorcraft low-altitude flight presents challenging problems in control, computer vision and image understanding.

A critical element. An acoustic-signature based method of estimating the flight trajectory of low-altitude flying aircraft that only requires a stationary microphone array is proposed. This method leverages the Doppler shifts of engine sound to estimate. Development of an onboard obstacle detection and estimation scheme for low altitude rotorcraft flight is necessary both for the development of pilot warning systems and as a step toward achieving fully autonomous flight.

Vision sensors provide passive sensing of obstacles, and allow a wide field of view and nearly infinite range.

Low-Altitude Operation of Unmanned Rotorcraft Sebastian Scherer May 9, CMU-RI-TR abort, and ground paths in 3D range data.

The landing site evaluation algorithm uses a patch-based coarse evaluation for slope and roughness, and a fine Flight. §Senior Engineer, Rotorcraft Flight Control Technology; also U.S. Army Aviation Development Directorate, Aviation and Missile Research, Development and Engineering Center Research.

Sridhar and A. Phatak, Analysis of image-based navigation system for rotorcraft low-altitude flight, IEEE Trans. Systems Man Cybernet. 22 () [18] B. Sridhar, R. Soursa and B. Hussein, Passive range estimation for rotorcraft low altitude flight. Part of the Advances in Pattern Recognition book series (ACVPR) Abstract.

Safe navigation of both manned and unmanned aircraft requires a robust runway identification process and reliable obstacle detection to determine the runway status before landing.

Passive range estimation for rotor-craft low altitude flight. Operating and Flight Rules, which specifically prohibits low flying aircraft. Minimum safe altitudes; general Except when necessary for takeoff or landing, no person may operate an aircraft below the. The automation of rotorcraft low-altitude flight presents challenging problems in flight control and sensor systems.

The currently explored approach uses one or more passive sensors, such as a. Design of an Adaptive Passive Collision Warning System for UAVs-IEEE TRANSACTIONS ON AEROSPACE AND ELECTRONIC SYSTEMS Vision-Only Automatic Flight Control for Small UAVs-IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY Energy-Based Long-Range.

[12] built a system for obstacle detection during rotorcraft low altitude flight. The requirements of an obstacle detection system for rotorcraft in low altitude flight based on various rotorcraft motion.

Flight-Path Estimation in Passive Low-Altitude Flight by Visual Cues G Digital Simulation of Atmospheric Turbulence for Dryden and von Karman Models G Flight Simulator Fidelity Assessment in a Rotor-craft Lateral Translation Maneuver G STOL/VTOL/STOVL Design and Piloted Simulation of Integrated Flight.

the rotorcraft scenario should include both passive and active sensors. Consequently, it introduces a maximally passive system which involves the use of passive sen- sors (TV, FUR) as well as the selective use of an active (laser) sensor.

The passive component is concemed with estimating range. We present a method for navigation of a small unmanned rotorcraft through an unsurveyed envi-ronment consisting of forest and urban canyons.

Optical flow measurements obtained from a vision system are fused with measurements of vehicle velocity to compute estimates of range.

The Rotorcraft Flying Handbook is designed as a technical manual for applicants who are preparing for their private, commercial, or flight instructor pilot certificates with a helicopter or gyroplane class rating.

Certificated flight instructors may find this handbook a valuable training aid, since detailed coverage of aerodynamics, flight controls, systems, performance, flight.

CiteSeerX - Document Details (Isaac Councill, Lee Giles, Pradeep Teregowda): Currently deployed unmanned rotorcraft rely on preplanned missions or teleoperation and do not actively incorporate.

provides flight time and distance calculators free for the air charter industry. Rotorcraft Research [67] Rotorcraft flight research began in earnest at Ames in the early s in conjunction with the newly established program between NASA and the U.S.

Army in rotorcraft technology and further to support NASA's emphasis on civil work accelerated in the late s with the arrival of several aircraft from NASA Langley when rotorcraft. An aeroelastic analysis was conducted to calculate flight loads on the OHD Kiowa Warrior main rotor blade at hover and forward flight conditions.

Centrifugal force and flap and chord bending moments were calculated with the University of Maryland Advanced Rotorcraft. Jack W. Langelaan: "State Estimation for Autonomous Flight in Cluttered Environments," Journal of Guidance, Control and Dynamics, vol.

30, no. 5, Jack Langelaan, ed.: "Special Issue on Aircraft. the aerodynamic performance capability of rotorcraft designed for heavy-lift and high-speed cruise (Refs.

1 to 6). The motivations for these investigations include the tremendous potential impact of an efficient, large rotorcraft on civil air transportation, and future military requirements for long-range. Visual Flight Rules -- for low-altitude navigation and tactical training be feet at airspeeds in excess of knots under visual flight rules.

The FAA and DOD have worked out rules for low-altitude. Airborne vehicles such as rotorcraft had to (and still have to) avoid obstacles such as antennas, towers, poles, fences, tree branches, and wires strung across the flight path.

Analyzed are the requirements of an obstacle detection system for rotorcrafts in low-altitude Nap-of-the-Earth flight based on various rotorcraft.

UAV Flight Experiments Applied to the Remote Sensing of Vegetated Areas Esther Salamí *, Cristina Barrado and Enric Pastor Computer Architecture Department, Universitat Politècnica de Catalunya. drag speed).

The speed range slower than L/D max is known as slow flight, which is sometimes referred-to as the “back side of the power-drag curve” or the “region of reverse command”. Speed faster than L/D max is considered normal flight, or the “front side of the power-drag curve”.

Normal flight. A wide range of these systems has been developed (see section ). passive stability can be a hindrance on a windy day as it causes rockets to turn the aim is to maintain a long stable flight at a low altitude. COVID Resources. Reliable information about the coronavirus (COVID) is available from the World Health Organization (current situation, international travel).Numerous and frequently-updated.

ARMY RDT&E BUDGET ITEM JUSTIFICATION (R-2 Exhibit) June BUDGET ACTIVITY PE NUMBER AND TITLE 2 - APPLIED RESEARCH A - Aviation Technology FY FY. UAV Modeling, Simulation, Estimation and Identification: Introduction.- Flight Dynamics Modeling of Coaxial Rotorcraft UAVs.- Modeling of a Micro UAV with Slung Payload.- Command and Control of.

A traffic collision avoidance system or traffic alert and collision avoidance system (both abbreviated as TCAS, and pronounced / t iː k æ s /; TEE-kas) is an aircraft collision avoidance system designed to .On many flight simulators, I have noticed that planes tends to get slower with increasing altitude.

For example, I can reach knots just above the sea level in Google Earth flight simulator(F16), but .Since pilots are unable to acquire extensive high-speed, low-altitude flight experience, and will certainly not admit to "buzzing" epi- sodes, data are unavailable.

Considerable differences of opinion concerning pilot capability to perform low-altitude flight .