Micro-positioning tool post
US4986150A · kind A · utility
Assignees
Inventor
Key dates
| Filing date | Mar 13, 1989 |
| Grant date | Jan 22, 1991 |
| Priority date | — |
| Expiry date | Mar 13, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T82/2585
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A micro-positioning tool post comprises a flexible support which performs parallel motion and supports a tool, a piezoelectric actuator for displacing the flexible support, a displacement sensor for detecting displacement of the tool, and a state observer for receiving the voltage applied to the piezoelectric actuator and the output from the displacement sensor as input, producing an estimate of a velocity signal and feeding back the estimate to the voltage applied to the piezoelectric actuator. The feedback control greatly improves the dynamic stiffness of the tool post while also providing excellent static characteristics, dynamic characteristics and static stiffness.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.