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  • Other Sources  (1,036)
  • MECHANICAL ENGINEERING  (1,036)
  • 1985-1989  (1,036)
  • 1
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    Unistik(TM) Vehicle Controller (1986)
    In:  Other Sources
    Details
    Publication Date: 2019-08-28
    Description: A single stick control system, like the lunar rover, is presented as a control to enable disadvantaged individuals to drive with only one hand.
    Keywords: MECHANICAL ENGINEERING
    Type: ASR-241 , NASA-TM-109618 , NONP-NASA-VT-93-190416
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    Dynamic sensing of 6-axis external force and moment applied to a robot end (1987)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: A dynamic force sensing method is proposed for a robot manipulator. A 6-axis wrist force sensor which is commonly used for robot force sensing does not take the direct measurement of the force and moment applied to an end effector externally from the environment of the manipulator, but takes the resultant of the gravity, the inertial force and moment on the end effector, and the external force and moment. The separation of gravitational and inertial force and moment from the measurement of the force sensor is crucial to achieving dynamically accurate force sensing and fast manipulator motion under force feedback control. A mathematical model is derived for the force sensing process and the separation of the force and moment as a nonlinear optimal state estimation problem formulated. Then an approximate solution is given using extended Kalman filtering techniques.
    Keywords: MECHANICAL ENGINEERING
    Type: NASA-TT-20065 , NAS 1.77:20065
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    Applications of Tethers in Space: Workshop Proceedings, Volume 2 (1986)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: Topics addressed include: tethered orbital transfer vehicle operations, Centaur and Shuttle tether technology; tethered constellations, gravitational effects; Shuttle continuous open wind tunnel; optimal control laws, electrodynamic tether technology; and space station facilities.
    Keywords: MECHANICAL ENGINEERING
    Type: NASA-CP-2422-VOL-2 , NAS 1.55:2422-VOL-2 , Oct 15, 1985 - Oct 17, 1985; Venice; Italy
    Format: application/pdf
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  • 4
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    Proceedings of a Workshop on Applications of Tethers in Space: Executive Summary (1986)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: The workshop was attended by persons from government, industry, and academic institutions to discuss the rapidly evolving area of tether applications in space. Many new applications were presented at the workshop, and existing applications were revised, refined, and prioritized as to which applications should be implemented and when. The workshop concluded with summaries developed individually and jointly by each of the applications panels.
    Keywords: MECHANICAL ENGINEERING
    Type: NASA-CP-2422 , NAS 1.55:2422 , Oct 15, 1985 - Oct 17, 1985; Venice; Italy
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 5
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    Improvement of conditions for meshing spiral bevel gears (1985)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: The effect of axial pinion displacement on gear meshing conditions during cutting and correction of the rolling chain gear ratio are analyzed. The so-called inverse problem-solving method is used.
    Keywords: MECHANICAL ENGINEERING
    Type: NASA-TM-77867 , NAS 1.15:77867
    Format: application/pdf
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  • 6
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    Study of meshing of beveled gears with normally decreasing arc teeth (1985)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: The meshing of beveled gears was studied by the direct and inverse approaches. Gear wheels with teeth of equal height are studied, and wheels with normally-decreasing arc teeth. Different coordinate systems are utilized to plot the determination of the rotation of the originating gear wheel and the meshing line of the gear wheel which is cut. Matrices are used to determine the equations of the originating surfaces and the unit vectors of the normals to these originating surfaces.
    Keywords: MECHANICAL ENGINEERING
    Type: NASA-TM-77866 , NAS 1.15:77866
    Format: application/pdf
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  • 7
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    Installation, maintenance and operating manual for the Lucas-type fuel injection system of the 3 B rotary engine (1985)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: The installation procedure, maintenance, adjustment and operation of a Lucas type fuel injection system for 13B rotary racing engine is outlined. Components of the fuel injection system and installation procedure and notes are described. Maintenance, adjustment, and operation are discussed.
    Keywords: MECHANICAL ENGINEERING
    Type: NASA-TM-77872 , NAS 1.15:77872
    Format: application/pdf
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  • 8
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    A deformation analysis of flat flexible gear and its equation of original curved surfaces (1985)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: The equation of the original curved surface of end harmonic gearing is determined by displacement analysis of flat flexible gear. The displacement analysis is also used to calculate the strength and rigidity of the gear. The latter is regarded as a circular plate with two concentrated loads, since its torsional rigidity is much larger than its bending rigidity. Small-deflection theory of thin plates is used to solve for the displacement of any point in the middle plane of the gear. New expressions are given for radial and tangential displacements of the middle plane under asymmetrical loading. A digital computer is used to obtain numerical values for the displacements.
    Keywords: MECHANICAL ENGINEERING
    Type: NASA-TM-77493 , NAS 1.15:77493
    Format: application/pdf
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  • 9
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    Planetary rover technology development requirements (1989)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: Planetary surface (including lunar) mobility and sampling capability is required to support proposed future National Aeronautics and Space Administration (NASA) solar system exploration missions. The NASA Office of Aeronautics and Space Technology (OAST) is addressing some of these technology needs in its base research and development program, the Civil Space Technology Initiative (CSTI) and a new technology initiative entitled Pathfinder. The Pathfinder Planetary Rover (PPR) and Sample Acquisition, Analysis and Preservation (SAAP) programs will develop and validate the technologies needed to enable both robotic and piloted rovers on various planetary surfaces. The technology requirements for a planetary roving vehicle and the development plans of the PPR and SAAP programs are discussed.
    Keywords: MECHANICAL ENGINEERING
    Type: JPL, California Inst. of Tech., Proceedings of the NASA Conference on Space Telerobotics, Volume 2; p 257-264
    Format: application/pdf
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  • 10
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    Dynamic force signal processing system of a robot manipulator (1987)
    In:  CASI
    Details
    Publication Date: 2019-08-27
    Description: If dynamic noises such as those caused by the inertia forces of the hand can be eliminated from the signal of the force sensor installed on the wrist of the robot manipulator and if the necessary information of the external force can be detected with high sensitivity and high accuracy, a fine force feedback control for robots used in high speed and various fields will be possible. As the dynamic force sensing system, an external force estimate method with the extended Kalman filter is suggested and simulations and tests for a one axis force were performed. Later a dynamic signal processing system of six axes was composed and tested. The results are presented.
    Keywords: MECHANICAL ENGINEERING
    Type: NASA-TT-20066 , NAS 1.77:20066 , JS-24-4
    Format: text
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