Automatic identification system for self tuning process controller
Patent 4368510 Issued on January 11, 1983. Estimated Expiration Date: 
October 20, 2000. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
October 20, 2000. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3221230 3534400 3758762 3767900 3876871 Gain-adaptive process control Three term (PID) controllers Patent #: 4214300 InventorAssigneeApplicationNo. 06/198801 filed on 10/20/1980US Classes:700/31, Having adjustment of model (e.g., update)318/561, Adaptive or optimizing systems including "bang-bang" servos700/38, Having perturbation700/42Proportional-Integral-Derivative (P-I-D)ExaminersPrimary: Ruggiero, JosephAttorney, Agent or FirmInternational ClassG05B 13/04 (20060101)AbstractA process for automatically identifying the parameters of a controller which controls a process and a process model which includes changing alternately the set point for the process by a predetermined value above and below the desired set point of the process which is continued until the parameters of the process model describe the process.The apparatus includes means for creating a cycle that has a plurality of steps, means for comparing a proportional amount of a set point change with a corresponding value of the process during one of the cycles steps during which the parameters are identified, means for repeating the cycle until the change in the values of the parameters between adjacent cycle is less than a predetermined amount, and means for terminating the cycle repetition if the parameter change between adjacent cycles is less than the predetermined amount.Other References
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