Results 1 to 10 of about 22,539 (211)

Lunar landing flight research vehicle Patent [PDF]

open access: yes, 1965
Lunar landing flight research ...
Allen, J. G., Jr., Levin, K. L.
core   +1 more source

Minimum DO/HB back tensions for the drum cable engine based upon more than zero longitudinal axial force acting on the optical submarine repeater during lay and recover

open access: yesNihon Kikai Gakkai ronbunshu
The drum cable engines with DO/HBs (Draw off hold back gear) have been indispensable equipments to lay and recover the optical submarine cables and the optical submarine repeaters.
Yoshihiro EJIRI
doaj   +1 more source

Centaur engine gimbal friction characteristics under simulated thrust load [PDF]

open access: yes
An investigation was performed to determine the friction characteristics of the engine gimbal system of the Centaur upper stage rocket. Because the Centaur requires low-gain autopilots in order to meet all stability requirements for some configurations ...
Askew, J. W.
core   +1 more source

A high resolution, adjustable, lockable laser mirror mount [PDF]

open access: yes, 1976
A prototype high resolution, adjustable, lockable mirror mount is described, suitable for use as a resonator end mirror mount in fieldable lasers. The prototype was vibrated to 15g levels, 10-2000 Hz, and was shown to be stable to within 1 arc second and
Chadwick, C. H.
core   +1 more source

Equilibrium properties of the Skylab CMG rotation law [PDF]

open access: yes
The equilibrium properties of the control moment gyroscopes of the Skylab are discussed. A rotation law is developed to produce gimbal rates which distribute the angular momentum contributions among the control moment gyroscopes to avoid gimbal stop ...
Anderson, G. M., Elrod, B. D.
core   +1 more source

Extravehicular tunnel suit system Patent [PDF]

open access: yes, 1970
Design and development of flexible tunnel for use by spacecrews in performing extravehicular ...
Kosmo, J. J., Tucker, E. M.
core   +1 more source

渐开线球齿轮万向节装配误差对传动误差影响的研究

open access: yesJixie chuandong, 2014
Because of using involute spherical gear double degree of freedom of movement and force transmission characteristic,the involute spherical gear gimbal is widely used in the field of bionic,but the assembly error is an important factor affected the ...
曹永晟, 盛德号, 张立杰, 李婷
doaj  

Performance Testing of a Magnetically Suspended Double Gimbal Control Moment Gyro Based on the Single Axis Air Bearing Table

open access: yesSensors, 2012
Integrating the advantage of magnetic bearings with a double gimble control moment gyroscope (DGCMG), a magnetically suspended DGCMG (MSDGCMG) is an ideal actuator in high-precision, long life, and rapid maneuver attitude control systems.
Jiancheng Fang   +3 more
doaj   +1 more source

Dynamics Modeling and Theoretical Study of the Two-Axis Four-Gimbal Coarse–Fine Composite UAV Electro-Optical Pod

open access: yesApplied Sciences, 2020
In the UAV electro-optical pod of the two-axis four-gimbal, the characteristics of a coarse−fine composite structure and the complexity of dynamics modeling affect the entire system’s high precision control performance.
Cheng Shen   +4 more
doaj   +1 more source

On the design and development of a miniature ceramic gimbal bearing [PDF]

open access: yes
A review is made of a program to develop ceramic gimbal bearings for a miniaturized missile guidance system requiring nonmagnetic properties and higher load capacity than possible with conventional AISI 440C stainless steel bearings.
Gordon, Keith M.   +3 more
core   +1 more source

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