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The Process Equations 6
The Controlled Process Equations
5 other sections not shown
_ I _ _ I I analog analog computer assumed coefficients Combining equations constant control responses controller equation controller lag critical damping effect flow heat exchanger heat transfer coefficient heater I I _ I I I I I I Q I Q I I Q Q increase initial conditions integral response load change obtain proportional controller Proportional plus rate Proportional plus reset proportional response tends Q 0 Q Q I Q Q Q I I Q Q Q rate controller rate response tends Rbcb REAC reset plus rate Section self-regulation shown in Fig single capacity process solution solved stability steady state error Substituting systm tank temperature thme lag Three capacity process unstable