Boots – shoes – and leggings
Patent
1992-05-27
1994-08-23
Smith, Jerry
Boots, shoes, and leggings
364177, 364487, G05B 1302
Patent
active
053412885
ABSTRACT:
The invention provides improved methods and apparatus for determining characteristics of a process--such as primary and second time constants, dead-time, and gain--by applying a doublet pulse to the process and measuring its response. By way of example, in one aspect of the invention, there is provided a method for generating a signal, .tau..sub.1, representing an estimate of a primary time constant of a non-self-regulating process, in accord with the mathematical expression .tau..sub.1 =(.delta.m.tau..sub.a.sup.2)/A.sup.+ is a factor representing the time-wise integration of the controlled variable during the period when the doublet pulse is being applied .delta.m is a factor representing an amount by which the manipulated variable is incremented, and .tau..sub.a represents the time period over which the controlled variable signal changes from its original value by a predetermined amount.
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Garland Steven R.
Smith Jerry
The Foxboro Company
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