An approach to high speed ship ride quality simulation [PDF]
, 1975 The high speeds attained by certain advanced surface ships result in a spectrum of motion which is higher in frequency than that of conventional ships.
Malone, W. L., Vickery, J. M.
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Dynamic performance analysis of a fuel-control valve for use in airbreathing engine research [PDF]
Dynamic performance analysis of fast-response fuel control valve for air breathing engine ...
Batterton, P. G., Zeller, J. R.
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Space Transportation System solid rocket booster thrust vector control system [PDF]
The Solid Rocket Booster, Thrust Vector Control (TVC) system was designed in accordance with the following requirements: self-contained power supply, failsafe operation, 20 flight uses after exposure to seawater landings, optimized cost, and component ...
Mccool, A. A. +2 more
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An air-bearing weight offload system for ground test of heavy LSS structures [PDF]
The capability and use of the Gravity Offload Facility (GOF) are discussed. Briefly explained are the: truss and base casting; carriage assembly; carriage weldment; vertical lift axis control; lifting cylinder; payload gimbal; motion base layout; and ...
Rice, R. B.
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The F-18 systems research aircraft facility [PDF]
To help ensure that new aerospace initiatives rapidly transition to competitive U.S. technologies, NASA Dryden Flight Research Facility has dedicated a systems research aircraft facility.
Sitz, Joel R.
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A plasma arc jet facility for extraterrestrial atmospheric entry studies [PDF]
Test facility for simulating thermodynamic environments of planetary atmospheric ...
Moran, T. F.
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Flight control system development and flight test experience with the F-111 mission adaptive wing aircraft [PDF]
The wing on the NASA F-111 transonic aircraft technology airplane was modified to provide flexible leading and trailing edge flaps. This wing is known as the mission adaptive wing (MAW) because aerodynamic efficiency can be maintained at all speeds ...
Larson, R. R.
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International Journal for Simulation and Multidisciplinary Design OptimizationWhen the direct-drive electro-hydraulic servo system is used for position control of hydraulic actuators, load unbalance or external disturbances can cause flow imbalance, leading to poor speed stability of the actuator and thus reduced position accuracy.
Shen Huan-huan, Liu Ruo-lan, Li Ge-qiang
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Rotor systems research aircraft predesign study. Volume 4: Preliminary draft detail specification [PDF]
The RSRA requirements are presented in a detail specification format. Coverage of the requirements includes the following headings: (1) aircraft characteristics, (2) general features of design and construction, (3) aerodynamics, (4) structural design ...
Linden, A. W., Miller, A. N.
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Electromechanical Simulation of Actively Controlled Rotordynamic Systems with Piezoelectric Actuators [PDF]
, 1991 Theories and tests for incorporating piezoelectric pushers as actuator devices for active vibration control are discussed. It started from a simple model with the assumption of ideal pusher characteristics and progressed to electromechanical models with ...
Kascak, A. F. +3 more
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