Method and apparatus for time-optimized positioning of at least one body in a desired target position
US4229684A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 7, 1978 |
| Grant date | Oct 21, 1980 |
| Priority date | — |
| Expiry date | Jul 7, 1998 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05B2219/43097
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
Disclosed is a system and method for controlling the motor drive for positioning a workpiece on a compound slide in such a way that the workpiece arrives at the target position in minimum elapsed time and without overshoot. A fixed program memory, in conjunction with a comparator and a combiner, is used to process information as to the actual position and velocity of the body and the desired position and velocity of the body to determine the optimum torque for the motor. The memory includes information as to the control characteristics of the motor and the desired path yet to be traveled to the target position. The method of positioning comprises the steps of controlling the motor so that it runs initially at maximum torque in a first region, at less than maximum torque and in the same direction in a second region, and then at yet another torque magnitude and with the torque in the opposite direction in a third region. The torque is brought to zero value within a predetermined distance from the target position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.