Boots – shoes – and leggings
Patent
1993-08-30
1995-04-04
Gordon, Paul
Boots, shoes, and leggings
364157, 364162, G05B 1302
Patent
active
054042895
ABSTRACT:
A process control apparatus varies a setpoint weighting factor .beta. according to both an error signal and a measurable dynamic characteristic of the process. The dynamic characteristic is either in terms of the normalized gain or normalized dead time of the process. For a PID controller, an initial value of the initial setpoint weighting factor .beta., a time at which the initial value should be varied, and the new value of the factor are all automatically set by a self-tuning procedure, wherein a processor is programmed to execute a set of correlation formulae which is applicable to a wide range of industrial processes.
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"A Clear Vision of Fuzzy Logic," N. Infelise, Control Engineering, Jul. 1991, pp. 28-30.
"Refinements of the Ziegler-Nichols Tuning Formula," C. C. Hang et al., IEE Proceedings-D, vol. 138, No. 2, Mar. 1991, pp. 111-118.
Cao Lisheng
Hang Chang C.
Gordon Paul
National University of Singapore
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