Showing papers on "Maximum power transfer theorem published in 1971"
TL;DR: In this paper, the authors considered the design of a laser transmitter that achieves maximum power transfer through the earth's turbulent atmosphere and showed that the fundamental limitation on power transfer imposed by the turbulence is considerably milder than had been thought.
Abstract: The design of a laser transmitter that achieves maximum power transfer through the earth's turbulent atmosphere is considered. It is shown that optimum power transfer would be realized with an adaptive system that uses the appropriate beacon signal to probe the channel state. This result is applied to show that the average power gain of the optimal earth-to-space optical link is the diffraction-limited gain for the apertures in vacuum. For large transmitting apertures the percentage fluctuation about this mean gain goes to zero. Thus the fundamental limitation on power transfer imposed by the turbulence is considerably milder than had been thought.
22 citations
01 Jan 1971
TL;DR: Sliding contact power transfer is feasible throughout the economical range of high speed intercity ground transportation as mentioned in this paper, but it is not practical at present at the overhead catenary approach and alongside contact rail concepts.
Abstract: Sliding contact power transfer is feasible throughout the economical range of high speed intercity ground transportation. Noncontact power transfer is not practical at present. Dividing line between the overhead catenary approach and alongside contact rail concepts is somewhere around 200 mph. Catenary distribution will very likely carry 50 kv, 60 Hz single phase power, while contact rails will most probably deliver three-phase, 60 Hz power at about 15 Kv.
4 citations
Patent•
18 Jan 1971
TL;DR: In this paper, means and methods for applying electrical power to the control surface servos after receiving a firing signal were discussed, as well as their application in a single-shot guided-missile system.
Abstract: In a missile, means and methods for applying electrical power to the control surface servos after receipt of a firing signal.
3 citations