Results 311 to 320 of about 2,417,705 (385)
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Continuous Finite-Time Attitude Control for Rigid Spacecraft Based on Angular Velocity Observer
IEEE Transactions on Aerospace and Electronic Systems, 2018This paper addresses the problem of designing an angular velocity observer and an output feedback attitude controller with finite-time convergence and disturbances for spacecraft.
Q. Hu, Boyan Jiang
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The Journal of the Acoustical Society of America, 2010
An angular velocity detector using a vibrator made of an annular thin film. The detector also has electrodes arranged ingeniously to have high detection sensitivity for angular velocities. The detector can detect angular velocities in two axial directions simultaneously. The detector has support portions ( 1105 ), ( 1106 ) which are formed over a first
Koji Fukumoto +4 more
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An angular velocity detector using a vibrator made of an annular thin film. The detector also has electrodes arranged ingeniously to have high detection sensitivity for angular velocities. The detector can detect angular velocities in two axial directions simultaneously. The detector has support portions ( 1105 ), ( 1106 ) which are formed over a first
Koji Fukumoto +4 more
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Fault-Tolerant Attitude Control for Rigid Spacecraft Without Angular Velocity Measurements
IEEE Transactions on Cybernetics, 2019In this paper, a fault-tolerant control scheme is proposed for the rigid spacecraft attitude control system subject to external disturbances, multiple system uncertainties, and actuator faults.
Xianghua Wang +3 more
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On the Relation between Angular Momentum and Angular Velocity
American Journal of Physics, 2007Students of mechanics usually have difficulties when they learn about the rotation of a rigid body. These difficulties are rooted in the relation between angular momentum and angular velocity, because these vectors are not parallel, and we need in general to utilize a rotating frame of reference or a time dependent inertia tensor.
José Maria Tavares, J. P. Silva
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Fault‐tolerant spacecraft attitude control under actuator saturation and without angular velocity
International Journal of Robust and Nonlinear Control, 2019In this paper, a fault‐tolerant control scheme is proposed to control the attitude of a rigid spacecraft subject to external disturbances and multiple system uncertainties, as well as actuator faults and saturation. More challengingly, it is assumed that
Xianghua Wang, Chee Pin Tan
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International Journal of Robust and Nonlinear Control, 2019
The fault‐tolerant control and vibration suppression for flexible spacecraft without angular velocity measurement are investigated. External disturbances, actuator faults, unknown angular velocity, and flexible vibration are addressed simultaneously ...
Xiuyun Zhang +3 more
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The fault‐tolerant control and vibration suppression for flexible spacecraft without angular velocity measurement are investigated. External disturbances, actuator faults, unknown angular velocity, and flexible vibration are addressed simultaneously ...
Xiuyun Zhang +3 more
semanticscholar +1 more source
Angular velocity measuring interferometer
Applied Optics, 1989A novel optical system to measure angular velocity based on the Doppler effect is presented. The system was developed to investigate the effect of rotation in the process of experimental modal analysis.
Joseph Shamir +2 more
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IET radar, sonar & navigation, 2019
Doppler radar can only measure the radial velocity of a moving object. If an object is moving along a curved path, when its radial velocity decreases, the angular velocity must increase.
Xiangrong Wang +3 more
semanticscholar +1 more source
Doppler radar can only measure the radial velocity of a moving object. If an object is moving along a curved path, when its radial velocity decreases, the angular velocity must increase.
Xiangrong Wang +3 more
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The Journal of the Acoustical Society of America, 2007
The present invention aims to present an angular velocity sensor having a self diagnosis function. An angular velocity sensor of the present invention includes a driving part for stably vibrating a driving part of a sensor element having a driver part and a detector part for detecting an angular velocity and detection means for detecting the ...
Tsutomu Nakanishi +3 more
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The present invention aims to present an angular velocity sensor having a self diagnosis function. An angular velocity sensor of the present invention includes a driving part for stably vibrating a driving part of a sensor element having a driver part and a detector part for detecting an angular velocity and detection means for detecting the ...
Tsutomu Nakanishi +3 more
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Digital measurement of angular velocity [PDF]
Journal of Physics E: Scientific Instruments, 1973 A new approach to the digital measurement of angular velocity is presented. A special optical transducer is described which provides the necessary pulse rate. The time between the pulses is measured and the division by time is achieved by a simple digital processor.
Barna Szabados +2 more
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