Boots – shoes – and leggings
Patent
1994-11-29
1996-10-22
Envall, Jr., Roy N.
Boots, shoes, and leggings
364162, 364148, 364177, G05B 1302
Patent
active
055683770
ABSTRACT:
A feedback controller configured to automatically tune a control system by determining proportional gain, integral time and/or derivative time control parameters based on estimates of process time delay, process time constant and process gain values which are monitored by the feedback controller. The feedback controller further determines control limits for estimating the process time delay based on the resolution of the sampled values of the process output and the standard deviation of the process output during the initial steady-state condition. The feedback controller also estimates characteristic areas for a first-order response based on a first-order plus time-delay model to determine process time constant and process gain values. These process time constant, process gain and process delay estimates are translated into proportional gain, integral time and/or derivative time control parameters based on design relations of the particular feedback controller.
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Decious Gaylon M.
Seem John E.
Envall Jr. Roy N.
Johnson Service Company
Presley Karen D.
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