Position controller
US6515442B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 24, 2001 |
| Grant date | Feb 4, 2003 |
| Priority date | — |
| Expiry date | May 24, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05B2219/41117
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
To overcome the problem of a low frequency disturbance causing minute vibrations affecting response attributable to the difficulty of adaption to the phase of the vibrations, the present invention provides a position controller, which includes a subtracter for subtracting a motor position signal from a movement position signal to produce an angle-of-twist signal; a high-pass filter for advancing the phase of the angle-of-twist signal; a low pass filter for eliminating only high-frequency components of the signal received from the high-pass filter; a circuit for multiplying the signal from a low-pass filter by a torque-corrective gain to produce a torque-corrected signal; a torque correction evaluation section for varying the torque-corrective gain according to the position deviation signal that is the difference between a position command and the movement position signal; and a subtracter for combining the torque-corrective signal and the torque command to produce a new torque command.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.