«angular velocity»
۷۳۷۸ نتیجهHow Angular Velocity Features and Different Gyroscope Noise Types Interact and Determine Orientation Estimation Accuracy
In human movement analysis, 3D body segment orientation can be obtained through the numerical integration of gyroscope signals. These signals, however, are affected by errors that, for the case of micro-electro-mechanical systems, are mainly due to: constant bias, scale factor, w
Spacecraft Angular Velocity Stabilization Using A Single-Gimbal Variable Speed Control Moment Gyro
Feedback controllers for the stabilization of the angular velocity vector of a rigid spacecraft using a single-gimbal Variable Speed Control Moment Gyro (VSCMG) are presented. Linearization of the equations of motion show that complete attitude stabilization is not possible via l
Angular Velocity Determination Directly from Star Tracker Measurements
Introduction Star trackers are increasingly used on modern day spacecraft. With the rapid advancement of imaging hardware and high-speed computer processors, current trackers are small and routinely achieve arc-second attitude accuracy. Typical sampling rates for these trackers r
Attitude Control without Angular Velocity Measurement: A Passivity Approach
It is well known that the linear feedback of the quar-ternion of the attitude error and angular velocity globally stabilizes the attitude of a rigid body. In this note, we show that the angular velocity feedback can be replaced by a nonlinear lter of the quaternion, thus removing
Angular Velocity Saturation in Planar Dust Cluster Rotation
Dust clusters, consisted of one up to twelve particles arranged in a horizontal plane, were formed in an inductively coupled rf plasma. When an axial magnetic field was applied to the dust clusters, the clusters rotate collectively in the left-handed direction with respect to the
Spacecraft Angular Velocity and Line-of-Sight Control Using A Single-Gimbal Variable-Speed Control Moment Gyro
It is well known that complete attitude control of a spacecraft is not possible with only one single-gimbal Variable-Speed Control Moment Gyro (VSCMG) due to the conservation of the angular momentum. However, partial attitude control without violating the angular momentum conserv
Maximal Voluntary and Electrically Stimulated Torque – Angle – Angular Velocity Profiles of the Knee Extensors and Flexors
In vivo measurements of maximum voluntary force – velocity show differences to the in vitro tetanic profile, with eccentric forces not increasing much above isometric and tending to decline with increasing lengthening velocity. Using transcutaneous electrical stimulation maximal
Kinematic path-following control of a mobile robot under bounded angular velocity error
This paper proposes a robust path-following control method of a kinematic mobile robot system subject to bounded angular velocity error. The angular velocity error usually arises from imperfect performance of the dynamic control system. Given a kinematic model of the mobile robot
Integrating rotation from angular velocity
The integration of the rotation from a given angular velocity is often required in practice. The present paper explores how the choice of the parametrization of rotation, when employed in conjuction with different numerical time-integration schemes, effects the accuracy and the c
NYSTAGMUS RESPONSES DURING TRIANGULAR WAVEFORMS OF ANGULAR VELOCITY ABOUT THE Y- AND Z-AXES Lieutenant
Nystagmus response parameters were estimated by a test procedure using short triangular waveforms of angular velocity. Mean estimates were determined as follows: n/'A = 15.5 seconds and K n ( f /A) = 8.0 seconds for the horizontal semicircular canals, and [D/A= 6.8 seconds and Kn