发明名称 |
Method and apparatus for controlling the position of a hydraulic boom |
摘要 |
A method is set forth for controlling the orientation of an articulated boom of the type having a first portion and a second feed arm portion such that the first portion remains parallel to a predetermined position during movement of the articulated boom. The method utilizes a computer which senses the angular position of the various parts of the boom in a total of five directions and computes the required angular position of the feed arm to maintain it parallel to a set position as the boom is moved in any direction. Various hydraulic servovalves are utilized to control the flow of hydraulic fluid in a manner to maintain parallelism within 1/2 DEG with the referenced position.
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申请公布号 |
US4514796(A) |
申请公布日期 |
1985.04.30 |
申请号 |
US19820415855 |
申请日期 |
1982.09.08 |
申请人 |
JOY MANUFACTURING COMPANY |
发明人 |
SAULTERS, JOHN D.;SCARR, ROGER H. |
分类号 |
E21B7/02;E21B15/04;G05B19/31;(IPC1-7):E21C11/00;F16M13/00 |
主分类号 |
E21B7/02 |
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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