Fully adaptive velocity tracking drive control positioning system
US5249118A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 3, 1991 |
| Grant date | Sep 28, 1993 |
| Priority date | — |
| Expiry date | Sep 3, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05B19/416
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
An infinitely adaptive motor control positioning system is disclosed which uses a calculated variable velocity curve while tracking deceleration and acceleration before and after application of a power pulse so as to anticipate movement for continuing adjustable power cycles. This enables the system to optimize positioning accuracy and minimize elapsed time positioning a driven mechanism. Up to seven phases of drive occur in any positioning move. Each phase consists of drive cycles when the motor receives power (and thus accelerates) and then is void of power (and thus decelerates). During each drive cycle, different sets of equations are implemented to calculate an "ideal speed" based upon the system response, actual speed, previously used power, and the distance still required to reach the target. The appropriate power computing equation is selected from a set of equations based upon a combination of factors: comparison of actual speed to "ideal" speed; pattern of speed change during the previous cycles; previous powers used; the velocity error; proximity to a phase transition; and the general trend of the mechanism response. The final target approach uses current position, speed…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.