Electricity: motive power systems – Positional servo systems – Adaptive or optimizing systems including 'bang-bang' servos
Patent
1978-07-07
1980-10-21
Truhe, J. V.
Electricity: motive power systems
Positional servo systems
Adaptive or optimizing systems including 'bang-bang' servos
318611, G05B 1300
Patent
active
042296846
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.
REFERENCES:
patent: 3836833 (1974-09-01), Harris et al.
patent: 3860861 (1975-01-01), Gucker
patent: 3893616 (1975-07-01), Trousdale
patent: 3914677 (1975-10-01), MacWade et al.
Stephens, IBM Technical Disclosure Bulletin, "Jerk Reduction for Bang Bang Servos", vol. 14, No. 6, Nov. 1971, pp. 1731-1731a.
Meier Walter
Saglini Marco
A.G. fur industrielle Elektronik AGIE Losone b. Locarno
Indyk Eugene S.
Truhe J. V.
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