Circuit for driving a plant such as a mechanical beam scanner and related system and method
US7567879B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 2, 2005 |
| Grant date | Jul 28, 2009 |
| Priority date | — |
| Expiry date | Dec 7, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05B13/042
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A device for driving a plant such as a beam scanner includes a memory, drive-signal generator, and a calibrator. The memory stores data corresponding to the drive signal, and the generator generates the drive signal from the data and couples the drive signal to the plant. The calibrator measures a response of the plant to the drive signal, calculates a difference between the measured response and a corresponding target response, and reduces the difference by altering the drive signal. Such a device can force the output response of the driven plant to equal a target output response, or to be sufficiently close to the target response for a particular application, while the device is operating in an open-loop configuration. Furthermore, while operating in an open-loop configuration, such a device often has a greater stability margin and greater noise immunity than a comparable device that operates in a closed-loop configuration.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.