Results 271 to 280 of about 1,990,834 (349)
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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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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
semanticscholar +1 more source
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.
M, Ben-Levy, S G, Braun, J, Shamir
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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
semanticscholar +1 more source
Angular velocity sensor and angular velocity detector
The Journal of the Acoustical Society of America, 2008The present invention provides a cheap angular velocity sensor capable of detecting angular velocity with high precision by using a vibration mode which cannot be set by external vibration. The angular velocity sensor includes: a vibrator ( 2 ) formed as a solid of revolution and made of a magnetostrictive material; a supporter ( 3 ) disposed on an ...
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An inertial piezoelectric hybrid actuator with large angular velocity and high resolution
Journal of Intelligent Materials Systems and Structures, 2019This article proposes an inertial piezoelectric actuator with hybrid design of asymmetrically clamping structures and a bias unit for the achievement of large angular velocity and high resolution.
Huilu Bao +5 more
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Vestnik Mashinostroeniya, 2023
A mechanical analog of cyclotron motion is found and a scheme of the corresponding device, which can be called a stabilized rotator, is determined. The natural frequency of rotation of a stabilized rotator is strictly fixed (it does not depend on either the moment of inertia or the moment of impulse) and remarkably coincides with the natural frequency ...
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A mechanical analog of cyclotron motion is found and a scheme of the corresponding device, which can be called a stabilized rotator, is determined. The natural frequency of rotation of a stabilized rotator is strictly fixed (it does not depend on either the moment of inertia or the moment of impulse) and remarkably coincides with the natural frequency ...
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Rigid-Body Attitude Tracking Control Under Actuator Faults and Angular Velocity Constraints
IEEE/ASME transactions on mechatronics, 2018The problem of rigid-body attitude tracking is examined for the case that there exist actuator faults and angular velocity constraints during the attitude maneuver.
Qiang Shen +4 more
semanticscholar +1 more source
IEEE Sensors Journal, 2018
In this paper, a strategy to detect the rotation direction in angular displacement and velocity sensors based on rotors loaded with circular chains of split ring resonators (SRRs) is presented. The rotor (made of a dielectric material) is loaded with two
J. Mata-Contreras +2 more
semanticscholar +1 more source
In this paper, a strategy to detect the rotation direction in angular displacement and velocity sensors based on rotors loaded with circular chains of split ring resonators (SRRs) is presented. The rotor (made of a dielectric material) is loaded with two
J. Mata-Contreras +2 more
semanticscholar +1 more source