发明名称 |
Apparatus for positioning a rotating element |
摘要 |
The position of a rotating element is controlled by a galvanometer and a servo system. The position of the rotating element is determined by using a two-grating moire pattern. Movement of the element causes a projected scale image representing radiation reflected from the element to shift relative to a fixed grating thereby generating moire fringes. The accumulated fringes serve to measure absolute position and motion of the element. The servo digitally processes the measured position to generate several force components which are then combined to control the amount of force applied by the galvanometer to rotate the element.
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申请公布号 |
US4705996(A) |
申请公布日期 |
1987.11.10 |
申请号 |
US19860916909 |
申请日期 |
1986.10.09 |
申请人 |
GREYHAWK SYSTEMS |
发明人 |
HARSHBERGER, JR., ROBERT P.;LOUCKS, BRYAN E.;WITTE, KENNETH G. |
分类号 |
G05B19/23;(IPC1-7):G05B1/06 |
主分类号 |
G05B19/23 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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