Improved proportional integral-derivative control apparatus

Details Improved proportional integral-derivative control apparatus Improved proportional integral-derivative control apparatus

1982-05-24

1984-08-14

Smith, Jerry

Boots, shoes, and leggings

364157, 364179, 318636, 318561, 318610, G05B 1304

Patent

active

044660545

ABSTRACT:
A process control apparatus is provided which has a PID controller to which is supplied a sampled signal of a control deviation signal of a process value signal and a reference signal and which generates a PID control signal according to sampled-value PID control constants. A non-linear controller is connected in parallel with the PID controller. A sum signal of the output signals from the PID controller and the non-linear controller is supplied to a process through a holding circuit. The process control apparatus further includes a circuit for identifying the dynamic characteristic of the process according to the sum signal and the sampled signal of the process value, and a circuit for calculating a transfer function of the process in the Laplace operator domain and for determining the sampled-value PID constants of the PID controller according to the dynamic characteristic.

REFERENCES:
patent: 3490691 (1970-01-01), Uyetani et al.
patent: 3552428 (1971-01-01), Pemberton
patent: 3578957 (1971-05-01), Gatlin
patent: 4232364 (1980-11-01), Bibbero
patent: 4265263 (1981-05-01), Hobbs
patent: 4346433 (1982-08-01), Rutledge
patent: 4349868 (1982-09-01), Brown
patent: 4368510 (1983-01-01), Anderson
patent: 4407013 (1983-09-01), Arcara et al.
Automatica, "On Self Tuning Regulators", vol. 9, 1973, pp. 185-199, by: K. J. Astrom and B. Wittenmark.
IEEE Transactions on Automatic Control, "Identifiability Conditions for Linear Multivariable Systems Operating Under Feedback", by: T. Soderstrom et al., Dec. 1976, pp. 837-840.

Affiliated with

Also associated with

Rating

Improved proportional integral-derivative control apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Improved proportional integral-derivative control apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Improved proportional integral-derivative control apparatus will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-117098