Boots – shoes – and leggings
Patent
1995-04-03
1996-11-05
Ruggiero, Joseph
Boots, shoes, and leggings
364149, 364165, 364157, G05B 1304
Patent
active
055724205
ABSTRACT:
A process control system which includes at least one manipulated variable and at least one controlled variable, provides a method for robust control of a process. Predetermined constraints of the manipulated variables and the controlled variables, and the present values of the manipulated variables are obtained. The controller is loaded with parameters which define an optimal controller, the parameters being calculated off-line. To determine the parameters a single min-max statement is defined for a worst case model of the process which operates in conjunction with a best case controller. The single min-max statement is converted to a corresponding canonical expression in the form of a minimization problem, the resultant solution of the minimization problem being the parameter. New values are calculated for the controlled variables for a predetermined number of points in the future, such that the values of the controlled variables are within the predetermined range thereby obtaining an optimal robustness of the resultant controller. The manipulated variables are also calculated to be within predetermined constraints, and the controlled variables to fall within a predetermined range when controllable. From a plurality of solutions, a most robust solution is selected. Then the manipulated variables are adjusted to cause the process control system to drive the values of the controlled variables to the calculated values.
REFERENCES:
patent: 5351184 (1994-09-01), Lu et al.
patent: 5442544 (1995-08-01), Jelinek
patent: 5457625 (1995-10-01), Lim et al.
Honeywell Inc.
Ruggiero Joseph
Sapelli Arthur A.
Shudy John G.
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