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.
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01 Feb 1973
TL;DR: In this paper, the results of a comparison of 41 previously reported test runs and human volunteer runs run by Mertz and Patrick in testing torque versus angular displacement response of the human head to -Gdx impact acceleration were discussed.
Abstract: This paper discusses the results of a comparison of 41 previously reported test runs and human volunteer runs run by Mertz and Patrick in testing torque versus angular displacement response of the human head to -Gdx impact acceleration Due to different instrumentation and measuring techniques, there were several differences, but large portions of the data were comparable The paper points out the need for anatomically based three-dimensional coordinate systems to permit quantitative comparisons between human subjects
56 citations
Patent•
10 Oct 2000TL;DR: In this article, an angular position sensor is used to determine the angular position of a rotating body based on a sensing axis having the greatest range of sensitivity according to the angular positions of the rotating body.
Abstract: An alignment system having an angular position sensing device using an accelerometer to determine the angular position of the device. Preferably, the angular position sensing device incorporates two dual-axis accelerometers oriented in a spaced apart relation for determining the angular position of a rotating body in space. The angular position sensing device is operable to account for centrifugal and angular acceleration errors due to the rotation of the rotating body in space, thereby providing an accurate angular position of the rotating body. The angular position sensor also determines the angular position of the rotating body based on a sensing axis having the greatest range of sensitivity according to the angular position of the rotating body.
55 citations
TL;DR: The present results support the concept that one can explain with a limited number of control variables an actor's behavior in an interception task during self-motion.
Abstract: The authors ran 3 experiments to investigate how catchers deal with the horizontal component of the ball's trajectory in an interception task during locomotion. The experiments were built upon the finding that velocity adaptations are based upon changes in the horizontal angular position or velocity of the ball with respect to the observer (M. Lenoir, M. Janssens, E. Musch, E. Thiery, & J. Uyttenhove, 1999); a potential underlying information source for that strategy is described. In Experiment 1, actor (N = 10 participants) and ball approached each other along the legs of a V-shaped track. When the velocity and the initial angular bearing of the ball were varied, the observed behavior fitted with nulling the horizontal angular velocity of the ball: A positive or negative angular velocity was compensated by a velocity change. Evidence was obtained that those adaptations are modulated by a critical change in, rather than by a critical state of, the environment-actor system. In Experiment 2, the di...
55 citations
Patent•
21 Jun 1991
TL;DR: In this article, an apparatus is disclosed for monitoring the movement and force production of the lumbar spine during flexion and extension in each of several sagittal-frontal planes of the body, as well as during movement into he transverse (twisting) plane.
Abstract: An apparatus is disclosed for monitoring the movement and force production of the lumbar spine during flexion and extension in each of several sagittal-frontal planes of the body, as well as during movement into he transverse (twisting) plane. The apparatus includes a rotatable platform upon which the patient is adapted to stand, and the platform is pivotable about a vertical axis, so that the platform may be pivoted to a selected angle and locked in position. A pelvic stabilization belt is mounted to the platform, and an overhead frame member is provided for rotation about a horizontal axis which is adapted to pass through the lumbro-sacral junction of the patient. An upper body yoke is mounted to the overhead frame member for rotation about a generally vertical axis which is perpendicular to the horizontal axis. An upper body engaging member is mounted to the yoke, and a control system is provided whereby the apparatus may be operated in a flexion/extension mode, or in a twisting mode, and with the foot platform in a selected angular position.
55 citations
Patent•
26 Jun 1979
TL;DR: In this article, a rotational position detecting apparatus for an internal combustion engine for detecting the rotation position of a crank shaft of the engine is presented, which consists of a rotating disk driven by the engine and giving a large number of angular information signals.
Abstract: This invention discloses a rotational position detecting apparatus for an internal combustion engine for detecting the rotational position of a crank shaft of the engine. The apparatus comprises a rotating disk driven by the engine and giving a large number of angular information signals and also a rotating disk having one reference information on the periphery thereof, an angle sensor for detecting the angular informations on the disk, a rotational reference sensor for detecting the reference information on the disk, waveform reshaping circuits for reshaping the output signals of said both sensors, and an electric circuit for determining the angular position and the reference position from the outputs of said waveform reshaping circuits, wherein a logical product of the reshaped output of the angle sensor and the reshaped output of the reference sensor is implemented, and the time of either one of the rise or fall of an output signal of the logical product is set to be an angular position, while the other one is set to be a reference position.
54 citations