Topic
Angular displacement
About: Angular displacement is a research topic. Over the lifetime, 5102 publications have been published within this topic receiving 46081 citations. The topic is also known as: rotational displacement.
Papers published on a yearly basis
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Papers
TL;DR: The study emphasizes the importance of head stabilization as part of the postural control system and described as a basis for inertial guidance.
Abstract: Head kinematics were studied in ten normal subjects while they executed various locomotor tasks The movement of the body was recorded with a video system which allowed a computer reconstruction of motion of joint articulations and other selected points on the body in three dimensions Analyses focus on head translation along the vertical axis and rotation in the sagittal plane This was done by recording the displacement of a line approximating the plane of horizontal semi-circular canals (the Frankfort plane: F-P) Four conditions were studied: free walking (W) walking in place (WIP) running in place (R) and hopping (H) In the 4 experimental conditions, amplitude and velocity of head translation along the vertical axis ranged from 1 cm to 25 cm and 015 m/s to 18 m/s In spite of the disparities in the tasks regarding the magnitude of dynamic components, we found a significant stabilization of the F-P around the earth horizontal Maximum amplitude of F-P rotation did not exceed 20° in the 4 situations Vertical angular velocities increased from locomotion tasks to the dynamic equilibrium task although the maximum values remained less than 140°/s Predominant frequencies of translations and rotations in all the tasks were within the range 04–35 Hz and harmonics were present up to 6–8 Hz During walking in darkness, mean head position is tilted downward, with the F-P always below the earth horizontal Darkness did not significantly influence the amplitude and velocity of head angular displacement during W, WIP and R, but during H the amplitude decreased by 37% Residual head angular displacement is found to compensate for head translation during the 4 conditions Our study emphasizes the importance of head stabilization as part of the postural control system and described as a basis for inertial guidance
850 citations
Patent•
7 Aug 2007TL;DR: In this article, a gear body is disposed forwardly of a tubular member around which a wire is wound and having a rotational axis disposed substantially parallel to the tubular part, and a first gear and a second gear for transmitting rotation of a gearbody to another gear body.
Abstract: A working unit includes a gear body disposed forwardly of a tubular member around which a wire is wound and having a rotational axis disposed substantially parallel to the tubular member, and a first gear and a second gear for transmitting rotation of a gear body to another gear body. The numbers of turns of wires, the size of a main shaft, and the size of a gear body, which are positioned forwardly of the tubular member, have no adverse effect on the manner in which a wire is wound around the tubular member. The wire can be wound around the tubular member over a wide region thereof for increasing the angular displacement of the gear body. The increased angular displacement of the gear body makes it possible to increase the angular displacement and rotational torque of the gear body.
561 citations
Patent•
13 Mar 2007
TL;DR: In this article, the angular position of a shaft of an electric motor relative to a nonrotating element is estimated by using a single-revolution angular position sensor and a reduction gear.
Abstract: Device 1 for detecting the angular position of a shaft of an electric motor relative to a nonrotating element, comprising a reduction gear 5 comprising an input connected in rotation to the shaft 2 , and an output such that the output of the reduction gear 5 moves over an angle of less than 2π, a single-revolution angular position sensor 26 being placed to measure the angle of the output of the reduction gear 5 and an angular position sensor 27 being placed on the input of the reduction gear 5.
444 citations
Patent•
7 Jan 2011
TL;DR: In this article, a rotational motion sensor is attached to the output shaft of a power tool to determine the user-imparted rotational motions of the power tool with respect to the longitudinal axis.
Abstract: A power tool includes an output shaft configured to rotate about a longitudinal axis, a motor drivably connected to the output shaft to impart rotary motions thereto, and a rotational motion sensor spatially separated from the output shaft and operable to determine the user-imparted rotational motion of the power tool with respect to the longitudinal axis. A controller is electrically connected to the rotational motion sensor and the motor. The controller determines angular velocity of the power tool about the axis, rotational displacement of the power tool about the axis, and/or a direction of the rotational displacement using input from the rotational motion sensor. The controller then controls the motor according to the angular velocity, the rotational displacement, and/or the direction of the rotational displacement.
409 citations
Patent•
17 May 2006
TL;DR: In this article, an orientation-sensitive signal output, in which a neutral position of a device is automatically determined in relation to at least a first axis and an angular displacement of the device is measured about at least the first axis, and shaking of the devices is detected.
Abstract: Orientation-sensitive signal output, in which a neutral position of a device is automatically determined in relation to at least a first axis, an angular displacement of the device is measured about at least the first axis, and shaking of the device is detected. A selection of the first control is received, and an output signal is output based at least upon the selection and the angular displacement or based upon detecting the shaking of the device.
372 citations
Related Topics (5)
Performance Metrics
| Year | Papers |
|---|---|
| 2026 | 1 |
| 2025 | 20 |
| 2024 | 20 |
| 2023 | 57 |
| 2022 | 99 |
| 2021 | 109 |