Results 261 to 270 of about 820,374 (307)

Fuzzy control application to guidance control for lunar gravity-turn

2005 International Conference on Machine Learning and Cybernetics, 2005
A fuzzy observer-based mixed parallel distributed compensation (PDC) fuzzy controller is utilized to generate guidance law for lunar gravity-turn descent. First, the Takagi-Sugeno fuzzy model is employed to approximate the probe system. Next, based on fuzzy model, a fuzzy observer-based mixed parallel distributed compensation (PDC) fuzzy controller is ...
null Sun Junwei, null Oji Ping Yuan, null Liu Fengqiu   +2 more
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Gravity control network at airports in nigeria

Journal of Geodynamics, 1987
Abstract A network of gravity of control bases located at most of the airports and airfields in Nigeria has been established as a means of controlling future gravimetric studies in Nigeriaand of integrating existing gravity surveys into a unified whole for the purpose of producing gravity anomaly maps for the country.
I.B. Osazuwa, D.E. Ajakaiye
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Absolute gravity as geodetic reference control

Journal of Geodynamics, 1987
Abstract Absolute gravity measurements with microgal accuracy represent a new tool for high accuracy vertical reference in properly selected distant sites. They offer therefore an ideal basis for control datum in Africa. As a by-product, eventual gravity changes with time can be followed (variations in water level depth, tectonic phenomena ...
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Control Time for Gravity-Capillary Waves on Water

SIAM Journal on Control and Optimization, 1995
Distributed open-loop control of small amplitude linear waves is considered on a fluid in which surface tension and gravity are significant. The control system is formulated as a first-order evolution equation, reducing the null controllability problem to a moment problem involving frequency exponentials.
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On orbit control using gravity gradient effects

Acta Astronautica, 1981
Abstract Possibility of orbit control using gravity gradient (GG) effects without any mass expulsion is discussed. For simplicity, a dumb-bell type satellite and circular orbits are mainly considered. It is shown that the GG effects can be applied to convert attitude torques into orbital torques and vice versa.
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Control of Cracking in Concrete Gravity Dams

Journal of the Power Division, 1959
Fundamental cause of temperature cracking in concrete gravity dams is restraint which accompanies temperature changes; evolution of crack control measures; role of cement factor, cement replacement material, concrete placing temperature, lift thickness, rate of placement, and insulation; current US Army Corps of Engineers practices and results.
William R. Waugh, James A. Rhodes
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Direction-Controlled Artificial Gravity for Space Exploration

45th AIAA Aerospace Sciences Meeting and Exhibit, 2007
For long-term space exploration, a unidirectional artificial gravity axis is inefficient and wasteful. The provision of direction-controlled artificial gravity, where the gravity axis can be different for every person, object or activity, leads to a far more efficient architectural design of the space exploration module. The purpose of this paper is to
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Gravity Control

SSRN Electronic Journal, 2021
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Robot motion control in zero-gravity conditions

Journal of Computer and Systems Sciences International, 2017
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
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Frequency-Crossing Pseudo-Gravity Control

This paper introduces a novel plasma control framework based on frequency-crossing pseudo-gravity, a force-like effective potential generated by engineered intersections of plasma dispersion modes in the ω–k domain. By tuning external driving frequencies to align with natural crossing points of plasma waves, nonlinear energy-density distortions produce
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