Results 21 to 30 of about 820,374 (307)

Drag-free and attitude control for the GOCE satellite [PDF]

open access: yes, 2008
The paper concerns Drag-Free and Attitude Control of the European satellite Gravity field and steady-state Ocean Circulation Explorer (GOCE) during the science phase.
Aguirre-Martinez   +13 more
core   +1 more source

Modeling and stabilization of eccentric gravity machinery

open access: yesAdvances in Mechanical Engineering, 2018
In general, eccentric gravity machinery is a rotation mechanism with eccentric pendulum mechanism, which can be used to convert continuously kinetic energy generated by gravity energy to electric energy.
Wu-Sung Yao
doaj   +1 more source

Adaptive sliding mode control with gravity compensation: Application to an upper-limb exoskeleton system [PDF]

open access: yesMATEC Web of Conferences, 2019
This paper presents a robust control algorithm with gravity compensation in presence of parametric uncertainties. The application deals with an upper limb exoskeleton system, aimed for a rehabilitation application. The treated system is an robot with two
Bembli Sana   +2 more
doaj   +1 more source

Dynamic Characteristics and Key Parameter Optimization of Mechanical Automatic Vertical Drilling Tools

open access: yesShock and Vibration, 2021
Mechanical automatic vertical drilling tools (MAVDT) have gradually gained attention as a drilling tool that can achieve active correction in harsh working environments such as high temperature and high pressure.
Jin Wang   +5 more
doaj   +1 more source

Human manual control performance in hyper-gravity [PDF]

open access: yesExperimental 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
openaire   +4 more sources

A new PC control software for ZLS-Burris gravity meters

open access: yesGeodesy and Geodynamics, 2018
The previous operation of the ZLS-Burris gravity meter using a PDA already provides a significant improvement of the operation of a metal spring gravity meter.
H. Richard Schulz
doaj   +1 more source

What is the best lateral radiograph positioning technique for assessment of sagittal balance: A biomechanical study on influence of different arm positions

open access: yesJournal of Orthopaedic Surgery, 2018
Purpose: To evaluate the influence of different arm postures from the physiological standing position using force plate analysis of the gravity line. Methods: Forty healthy volunteered university students were enrolled.
Koon-Man Sieh   +3 more
doaj   +1 more source

Position and Attitude Control Based on Single Neuron PID With Gravity Compensation for Quad Rotor UAV

open access: yesJournal of Aerospace Technology and Management, 2023
Aimed at the deficiency of existing PID controller for quad rotor UAV, a single neuron PID controller with gravity compensation is presented. After using feed forward control to compensate gravity, the position loop adopts PID control to ensure control ...
Haitao Zhang, Lulu Yang
doaj  

Postural adaptation to microgravity underlies fine motor impairment in astronauts’ speech

open access: yesScientific Reports, 2023
Understanding the role of anti-gravity behaviour in fine motor control is crucial to achieving a unified theory of motor control. We compare speech from astronauts before and immediately after microgravity exposure to evaluate the role of anti-gravity ...
Arian Shamei   +3 more
doaj   +1 more source

All-propulsion design of the drag-free and attitude control of the European satellite GOCE

open access: yes, 2009
This paper concerns the drag-free and attitude control (DFAC) of the European Gravity field and steady-state Ocean Circulation Explorer satellite (GOCE), during the science phase.
Canuto   +18 more
core   +1 more source

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