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- Title
Development of angular velocity vector measurement of a spherical rotor based on color sensors.
- Authors
Pan, ChengGang; Zhang, GaoFei
- Abstract
Spherical actuators have many applications in satellite attitude control. It is very important for closed-loop control to measure the angular velocity vector of the spherical rotor accurately and quickly. This paper proposes one non-contact method for measuring angular velocity vector of a spherical rotor, using four color sensors. The spherical rotor surface should be color-coded with red, blue, green, magenta, yellow, cyan, black and white, while each color covers an octant in sequence. Four color sensors are mounted about the vertexes of a tetrahedron, used to sense the color of the spherical surface and transform them into angular velocity vector. Simulations approve the correctness of this method, within a module error of approximately 5.2 rpm and a direction error of 0.88 degree within 4000 rpm. Experiments verify that the random error is smaller than 2.7 rpm and direction error smaller than 1.1 degree within 2000 rpm.
- Subjects
ANGULAR velocity measurement; ROTORS; ARTIFICIAL satellite attitude control systems; ACTUATORS; CLOSED loop systems
- Publication
Transactions of the Institute of Measurement & Control, 2018, Vol 40, Issue 13, p3736
- ISSN
0142-3312
- Publication type
Article
- DOI
10.1177/0142331217734041