Voyager design study. volume vi- program plans
Voyager spacecraft design - landing module sterilization effects and requirements, long term space soak effects, high reliability requirements, and entry and operation on Mars
STERILIZATION↗
SEARCH · Engineering Papers
Results for “high reliability”
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.
Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.
Electrolytic etching process provides effective bonding surface on stainless steel
Electrolytic etching process prepares surfaces of a stainless steel shell for reliable, high strength adhesive bonding to dielectric materials. The process uses a 25 percent aqueous solution of phosphoric acid.
Source record↗
Quick attach and release fluid coupling assembly is self-aligning, self-sealing
Fluid coupling assembly that is self-aligning, self-sealing and contains a bellow ball and socket coupling for quick attach and release is highly reliable and can handle cryogenic fluids where icing is encountered. The fluid coupling assembly is used in many fluid systems but is particularly applicable to cryogenic systems.
Herold, C. P.↗
Tooling concepts for assembly of large structures
Manufacture of the S-IC stage of the Saturn V space vehicle has resulted in new. concepts and innovations in the field of tooling. The structure size (35-ft diameter), the high reliability and accuracy requirements, and the low density or production quantity lead to a greater degree of simplicity, economy, and versatility in fabrication and assembly tooling. There are three specific concepts which should be applicable in industry, local jigging for welding, rotation of structures in vertical assemblies, and the assembly of two structures. The usual weld jigging serves a two-fold purpose: (a) to support the molten weld puddle and (b) to force and maintain alinement of the parts being welded. The extension of this method to large-diameter tanks is expensive and difficult. An alternate procedure used at MSFC is to perform free-state welding and use local jigging (stra1rclamps) and intermittent tack welding. Cylindrical structures can be accurately rotated for routing or welding on a simplified ring turntable. The tool consists of a ring of the structure diameter resting on rollers. Torque is nearly zero since the ring is rotated by friction rollers with the force being applied at the ring perimeter. Two such turntables are used at MSFC. The horizontal mating of two large components, where controlled motions of small magnitude are necessary, can be easily done by positioning units equipped with air-bearings. Such bearings are usable on concrete of minimum surface preparation and require no special air pressure source. This concept is used in assembly of the two S-IC containers.
Saturn S-IC stage↗
An extendible structure for solar electric power in space
The needs of certain space experiments have required the development of a mechanism capable of extending solar array panels from a spacecraft in orbit, and of positioning the panels so they function effectively as solar collectors. Rather stringent design requirements were imposed by the power and configuration requirements of the spacecraft itself. Further, since high reliability was essential, a simple mechanism was called for. The resulting design can be described as four "jack-in-the-box" modules, each containing a simple slider-crank device which extends and positions a solar panel in a single, continuous cycle. The modules have been fabricated and qualification tested and will be flight-tested in the near future.
EXPANDABLE STRUCTURE↗
A silicon monolithic, micropower complementary flip-flop.
Low power consumption, high reliability and fully integrated silicon monolithic complementary flip- flop circuit
TRANSISTOR CIRCUIT↗
Test and inspection for process control of monolithic circuits
Report details the test and inspection procedures for the mass production of high reliability integrated circuits. It covers configuration control, basic fundamentals of quality control, control charts, wafer process evaluation, general process evaluation, evaluation score system, and diffusion evaluation.
Spangenberg, E.↗
Advanced materials and structures for entry systems.
Materials and structural concepts for design of entry systems, discussing environmental factors, reuse potential and high reliability
SPACECRAFT CONSTRUCTION MATERIAL↗
Process techniques study of integrated circuits Interim scientific report no. 1
Advanced processing techniques for fabricating high reliability silicon integrated circuits, and failure mode studies
Meinhard, J. E.↗
Breakaway electrical connector
One-shot, breakaway multiwire cable connector is fabricated by using a number of small-diameter interconnecting wires, each of which, differing incrementally in length, is welded to neighboring pin and cable terminations. This design eliminates frictional binding and provides highly reliable cable interconnections until the connector is disengaged.
Katzin, L.↗
A release mechanism with mechanical redundancy
High reliability release mechanism with mechanical redundancy on SERT 2 satellite
Paradise, J. J.↗
Active parallel redundancy for electronic integrator-type control circuits
Circuit extends concept of redundant feedback control from type-0 to type-1 control systems. Inactive channels are slaves to the active channel, if latter fails, it is rejected and slave channel is activated. High reliability and elimination of single-component catastrophic failure are important in closed-loop control systems.
Peterson, R. A.↗
Precision calibration and reference voltage source for data acquisition systems
Hybrid integrated circuit operational amplifiers, which have inherent characteristics of low quiescent power dissipation and extended operational lifetime with high reliability, are source for digital systems. Amplifiers are coupled to Zener reference diode in current control and buffer configuration.
Source record↗
Television multiplexing system
System with single, standard, wideband line transmits ten or more real time TV video data displays over hard wire to recorders more than 22.5 km from source. Digital logic and integrated circuits ensure high reliability and low maintenance. System is adaptable for video sampling applications.
Simpkins, L. G.↗
Method of making a solid propellant rocket motor Patent
Method of making solid propellant rocket motor having reliable high altitude capabilities, long shelf life, and capable of firing with nozzle closure with foamed plastic permanent mandrel
Thibodaux, J. G., Jr.↗
Specification guidelines for hybrid microcircuits
Guidelines establishing manufacturing and control procedures for hybrid microcircuits used in aerospace programs may have possible commercial and industrial applications. Guidelines encompass parts, materials, and process controls, as well as assembly, packaging methods, screening, and inspection procedures for procurement of custom packaged, high reliability microcircuits.
Caruso, S. V.↗
Study of bonding methods for flip chip and beam leaded devices
The results are presented of a comprehensive study and evaluation for the bonding of flip chip and beam leaded devices onto hybrid microcircuit substrates used in high reliability space applications. The program included the evaluation of aluminum flip chips, solder (silver/tin) bump chips, gold beam leaded devices, and aluminum beam leaded devices.
Rudd, H. C.↗
A release mechanism with mechanical redundancy
A simple release mechanism is described that achieves high reliability through active mechanical redundancy on the SERT 2 satellite. Principle of operation, design details, and the test program are discussed. Examples of developmental and proposed alternate configurations also are included.
Paradise, J. J.↗