Results 11 to 20 of about 155,574 (308)
Gravity compensation and optimal control of actuated multibody system dynamics [PDF]
IET Control Theory & Applications, 2022 This work investigates the gravity compensation topic, from a control perspective. The gravity could be levelled by a compensating mechanical system or in the control law, such as proportional derivative (PD) plus gravity, sliding mode control, or ...
Saeed Rafee Nekoo +2 more
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Effects of Local Gravity Compensation on Motor Control During Altered Environmental Gravity [PDF]
Frontiers in Neural Circuits, 2021 Our sensorimotor control is well adapted to normogravity environment encountered on Earth and any change in gravity significantly disturbs our movement.
Tjasa Kunavar +10 more
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Controlling for Heterogeneity in Gravity Models of Trade and Integration [PDF]
Review, 2005 This paper compares various specifications of the gravity model of trade as nested versions of a general specification that uses bilateral country-pair fixed effects to control for heterogeneity. For each specification, we show that the a theoretical restrictions to obtain them from the general model are not supported statistically. Because the gravity
I-Hui Cheng, Howard J. Wall
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Human manual control performance in hyper-gravity [PDF]
Experimental Brain Research, 2015 Hyper-gravity provides a unique environment to study how misperceptions impact control of orientation relative to gravity. Previous studies have found that static and dynamic roll tilts are perceptually overestimated in hyper-gravity. The current investigation quantifies how this influences control of orientation.
Newman, Michael C. +4 more
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MachinesIt is essential to ensure stability during marine transportation or the installation of high center of gravity loads. The heavy loads increase gravity disturbance, affecting the steady-state-error control of the multiple degrees of freedom (DOFs) motion ...
Zhiyuan Lv +3 more
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Research on the design and simulation of grid-connected system of vertical gravity energy storage [PDF]
Scientific ReportsDue to the characteristics of the body’s movement, the output power of the gravity energy storage system is unstable. When the system is connected to the grid, smooth control of the output power is required.
Yirun Ji +6 more
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Research on reference frames and reference networks in Poland in 2019–2022
Advances in Geodesy and Geoinformation, 2023 The article presents the reviewed and summarised research activities of Polish research groups on reference frames and reference networks in a period of 2019–2022.
Jan Kryński, Tomasz Liwosz
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Aerospace, 2023 With the continuous development of the space industry, the demand for low-gravity simulation experiments on the ground for spacecraft is increasing, to overcome the gravity compensation of spacecraft on the ground tests.
Jian Cao +4 more
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Research on reference frames and reference networks in Poland in 2015–2018 [PDF]
Geodesy and Cartography, 2019 Research activities of Polish research groups in a period of 2015–2019 on reference frames and reference networks are reviewed and summarised in this paper. The summary contains the results concerning the implementation of latest resolutions on reference
Jan Krynski +2 more
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Gravity is controlled by the cosmological constant [PDF]
Physical Review D, 2005 We discuss a Randall-Sundrum-type two D-braneworld model in which D-branes possess different values of the tensions from those of the charges, and derive an effective gravitational equation on the branes. As a consequence, the Einstein-Maxwell theory is realized together with the non-zero cosmological constant.
Yukinori Iwashita +3 more
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