Electricity: motive power systems – Positional servo systems – Program- or pattern-controlled systems
Patent
1973-01-15
1977-02-22
Dobeck, Benjamin
Electricity: motive power systems
Positional servo systems
Program- or pattern-controlled systems
318687, 318696, G05B 1940
Patent
active
040094286
ABSTRACT:
A control system for controlling the relative movement of a head member over a surface such as a plate member in accordance with digital input information. The head member and the surface form a linear, two-axis synchronous motor and the input signal to the head member is controlled to be a translating field vector to produce movement of the head member relative to the surface. The phase of the translating field vector is controlled to lead or lag the position vector of the surface by an electrical angle which is a direction function of the acceleration or deceleration required. An initial acceleration is used to bring the head member up to the desired terminal speed as quickly as possible and with the head then moved at a constant speed until a point when a signal is applied to produce a deceleration to slow down the head so that the head may be stopped at the position on the surface. Additional acceleration and deceleration vectors are provided to control the movement of the head member. The signal applied to the head member may be an analog signal formed as an integrated value from the digital input information.
REFERENCES:
patent: 3457482 (1969-07-01), Sawyer
patent: 3523230 (1970-08-01), York
patent: 3535604 (1970-10-01), Madsen et al.
patent: 3553549 (1971-01-01), Leenhouts
Dobeck Benjamin
Roston Ellsworth R.
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