Electricity: motive power systems – Positional servo systems – Plural servomotors
Patent
1990-08-22
1992-01-21
Shoop, Jr., William M.
Electricity: motive power systems
Positional servo systems
Plural servomotors
318571, 318 39, 318616, 314 69, 36447415, G05B 1132
Patent
active
050830740
ABSTRACT:
In a method for performing a synchronized superposed operation of two servomotors, controllers for the servomotors perform the control for achieving the synchronized superposed operation by: calculating, for each of the servomotors, the difference, or differences, between the ideal speed and/or position deviations obtained from a control command and the actual speed and/or position deviations obtained from the rotation of the servomotor; calculating a speed correction quantity, or a speed correction quantity and a current correction quantity, from the discrepancy, or discrepancies, between the differences calculated for both of the servomotors; and adding the correction quantity, or quantities, to a speed command, or to a speed command and a current command, given to the subsidiary shaft side. Thus, a synchronized superposed operation of servomotors in which speeds and responses of the main shaft and the subsidiary shaft are well balanced therebetween can be achieved.
REFERENCES:
patent: 3586222 (1971-06-01), Rosen
patent: 4629956 (1986-12-01), Nozawa et al.
patent: 4879660 (1989-11-01), Asakura et al.
Ikutame Teruaki
Suzuki Hironori
Bergmann Saul M.
Mitsubishi Denki & Kabushiki Kaisha
Shoop Jr. William M.
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