Multiplex control system

Details Multiplex control system Multiplex control system

1984-10-17

1986-05-06

Shoop, Jr., William M.

Electricity: motive power systems

Positional servo systems

With protective or reliability increasing features

318565, 318632, 318610, 364135, 364162, G05B 903

Patent

active

045874700

ABSTRACT:
A multiplex control system including a plurality of controllers, the main controller being arranged by hardware, while the subsidiary controller being accomplished by software. Each of the controllers has a PID operator for calculating the proportional, differential and integral components of process data, and the difference of the integral components of both PID operators is processed through a first-order time lag operator and the result is used to correct the error of the output from the PID operator of the subsidiary controller. In the occurrence of abnormality, control of the control object is switched from the main controller to the subsidiary controller using the first-order time lag element attached to the switch unit thereby preventing the tracking of control data.

REFERENCES:
patent: 4013877 (1977-03-01), Uram
patent: 4031372 (1977-06-01), Davis
patent: 4209734 (1980-06-01), Osder
patent: 4390942 (1983-06-01), de Keizer
patent: 4504905 (1985-03-01), Burrage

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