Method for generating axis control data for use in controlling a grinding machine and the like and system therefor
US4791575A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 31, 1986 |
| Grant date | Dec 13, 1988 |
| Priority date | — |
| Expiry date | Oct 31, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05B2219/34048
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
The cam lift data is analyzed (110) through the use of a fast fourier transform (FFT) (116) to thereby obtain FFT coefficients (118) which define the amplitude and frequency content of the cam lift data. Through a combination of the kinematic model and an inverse FFT procedure, an axis control function including a position control function (Eq. 1 and Eq. 14) is determined (128) for each axis. Dynamic compensation (130) of each axis is provided for system lags and inertia loads by altering the axis control function as a proportion of the axis velocity and acceleration (130), respectively. For each controlled axis an independent vector and a corresponding dependent vector containing axis control data is generated (132). During the actual control of first and second drive motors (72, 70) of the grinding machine, position and velocity feedback signals are generated for each axis by feedback devices (82, 78). A master/slave control arrangement is provided between the two axes wherein the positional feedback signal (186) from one axis is utilized in the control of the other axis to eliminate time lags between control of the two axes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.