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The disciplines of servomechanisms and process-control have been developed for many years. An inherent feature of their practical application was the use of analog components. In an attempt to integrate process-control instrumentation with digital computers and data-processing equipment, it has been necessary to develop new techniques. The underlying mathematical foundation for this treatment is the concept of a sampled-data control system utilizing z transforms.
Industrial Electronics and Control Instrumentation, IEEE Transactions on (Volume:IECI-12 , Issue: 2 )
Date of Publication: Nov. 1965