Attitude control for spacecraft Patent
Attitude control system for spacecraft based on conversion of incident solar radiation on movable control surfaces into mechanical torques
Acord, J. D.↗
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Results for “torque”
Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
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On the synthesis of suboptimal, inertia-wheel attitude control systems
Suboptimal attitude control system for Nimbus satellite using motor-driven inertia wheels as control torque source for three dimensional control
Clark, L. G.↗
Optimal desaturation of momentum exchange control systems
Optimal desaturation of angular momentum exchange controllers in spacecraft attitude control systems, using natural environmental torques
Johnson, C. D.↗
Unique mechanism features of ATS stabilization boom packages
ATS attitude stabilization boom packages, describing torque transmission, drum synchronization, electrical isolation, lubrication, etc
Grimshaw, E. R.↗
A minimum-fuel mode for steady-state attitude control of an earth-orbiting spacecraft
Steady state off-on attitude control strategy for minimizing propellant consumption and thrust ignitions of satellite in presence of environmental disturbance torques
Chu, S. C.↗
Optimal control moment gyro distribution and steering laws
Control moment gyro /CMG/ for spacecraft attitude control, determining optimal gimbal angle rate for desired torque
Holland, L. D.↗
Direction-cosine attitude-control logic for spin-stabilized axisymmetric spacecraft
Direction cosine attitude control logic for spin stabilized axisymmetric spacecraft, using control torques generated by reaction jet system
Childs, D. W.↗
Vacuum-jacketed rotary joints for pipelines
Joint absorbs all significant torque, is as rugged as heavy metallic pipe, and has thermal insulation comparable to length of flexible pipe. Design is adaptable to any pipes transporting gases or liquids, including those which are noxious or corrosive.
Mursinna, R. C.↗
Performance evaluation system for inertial navigation equipment
Testing system studies inertial characteristics of gyroscopic devices. System consisting of instrument support package, dynamic test table, torque control electronics, and real-time computer evaluates performance of prototype gyroscopic strapdown units in inertial-grade attitude-reference systems. System is applicable to commercial aircraft.
Mc Kern, R. A.↗
A lightweight, high output soil sampler
Sampler is useful on or under earth's surface or on sea bottom. Larger sample amount is obtained relative to sampler size and weight and limited particle size sample material is continuously delivered. Silicone rubber linear in transport tube nearly eliminates grinding or particulate processing during sampling, and reduces required torque.
Howard, E. A.↗
Thermal heliotrope - A passive sun-tracker
Continuous sun tracking device consists of helical bimetallic coil and control mechanism. Coil produces torque and angular displacement with temperature change, and acts as device's driving element. Control mechanism, concentric shading mechanism containing bimetallic sensor coil, controls tracking rate and provides for reset cycle.
Byxbee, R. C.↗
Cadmium plated steel caps seal anodized aluminum fittings
Cadmium prevents fracturing of hard anodic coating under torquing to system specification requirements, prevents galvanic coupling, and eliminates need for crush washers, which, though commonly used in industry, do not correct leakage problem experienced when anodized aluminum fittings and anodized aluminum cap assemblies are joined.
Padden, J.↗
Brushless DC motor with dual windings
Motor has high starting torque and high running speeds. Control system consists of Hall effect generator/resolver and associated electronic amplifiers and switches. Motor operation is described.
Auclair, G. F.↗
Joint preload properties of structural threaded fasteners
Proper installation techniques are described and reliable torque-tension values are presented on joint preload /or clamp load/ properties of structural threaded fasteners.
Brenner, H. S.↗
Experimental windage losses for a Lundell generator operating in air in the turbulent flow regime
Viscous torque or windage losses for Lundell generator rotor in air and turbulent flow
Gorland, S. H.↗
Balance torquemeter Patent
Torquemeter for determining magnitude of torque generated by interaction of magnetic dipole between test specimen and ambient magnetic field
Boyle, J. C.↗
Foreshortened convolute section for a pressurized suit Patent
Development of improved convolute section for pressurized suits to provide high degree of mobility in response to minimum of applied torque
Marroni, M. A., Jr.↗
Optimization of conical hydrostatic bearing for minimum friction
Equations for flow rate, load capacity, and friction torque for conical hydrostatic bearings under laminar and turbulent flow conditions
Anderson, W. J.↗