Results 131 to 140 of about 90,830 (223)

Microconcentrator Solar Panel Architectures Achieving High Specific Power for Deep Space Missions

open access: yesSolar RRL, Volume 10, Issue 4, 26 February 2026.
Microconcentrator photovoltaics (microCPV) are emerging as a promising solution for powering spacecraft in deep space, where conventional solar arrays are challenged by extremely low‐intensity, low‐temperature conditions. This work presents the design, development, and characterization of two optical architectures aiming at maximizing specific power (W/
Guido Vallerotto   +8 more
wiley   +1 more source

Portable machine welding head automatically controls arc [PDF]

open access: yes, 1967
Portable weld tool makes weld repairs out-of-station and on the side opposite the original weld. It provides full automatic control of the arc voltage, current, wire feed, and electrode travel speed in all welding attitudes.
Oleksiak, C. E., Robb, M. A.
core   +1 more source

Variable polarity arc welding [PDF]

open access: yes
Technological advances generate within themselves dissatisfactions that lead to further advances in a process. A series of advances in welding technology which culminated in the Variable Polarity Plasma Arc (VPPA) Welding Process and an advance ...
Bayless, E. O., Jr.
core   +1 more source

A generalized method for multiple robotic manipulator programming applied to vertical-up welding [PDF]

open access: yes
The application is described of a weld programming algorithm for vertical-up welding, which is frequently desired for variable polarity plasma arc welding (VPPAW).
Andersen, Kristinn   +4 more
core   +1 more source

Pulsed arc welding

open access: yesWelding International, 2002
openaire   +2 more sources

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