Boots – shoes – and leggings
Patent
1993-09-10
1996-04-02
Envall, Jr., Roy N.
Boots, shoes, and leggings
364162, 364164, G05B 1302
Patent
active
055046720
ABSTRACT:
An industrial process controller, and methods of controlling an industrial process, are provided for controlling a process variable responsive to a set point. The industrial process controller has a differentiator for determining a difference signal between a process variable and a set point. A timing synchronizer is operatively connected to the differentiator for generating a synchronized timing reference signal responsive to the difference signal. A feedforward controller is operatively connected to the differentiator and the timing synchronizer for generating a lead/lag feedforward signal responsive to the difference signal and the synchronized timing reference signal. A proportional and derivative controller is operatively connected to the differentiator and the timing synchronizer for generating an output signal responsive to the difference signal. The proportional and derivative controller has a generator for generating a proportional signal and a derivative signal. A summer combines the output signal of the proportional and derivative controller with the feedforward signal to thereby generate a command signal for the process variable. A feedforward characterizer is operatively connected to the proportional and derivative controller and the summer for providing thereto a characterized feedforward control signal based upon the command signal to thereby control an overall gain between the process variable and the set point of the industrial process.
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Carlson John W.
Hardiman Ted L.
Envall Jr. Roy N.
Garland Steven R.
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