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Introductory Concepts of Control
METHODS OF CONTROL
SERVO OPERATION AND REGULATOR OPERATION
9 other sections not shown
15 psig assumed behavior bellows block diagram Btu/hr capacitance change in set Chapter coefficient constant continuous-flow control system control valve controlled variable controller action controller gain damping factor derivative action differential equation driving force dynamics effect electrical analogy error example feed rate feed temperature feedback feedforward first-order element fluid frequency response ft3/min gain factor given in Equation heat transfer Hence illustrated indicated inside film integral action interaction Laplace transformation lb/hr leaving flow rate linear liquid load variable loop lumped parameter maximum gain normal obtain offset open-loop open-loop control output pressure phase margin Problem process control proportional action proportional control proportional-integral controller psi/psi psig pure delay reaction curve method reactor reset resistance result SCFM second-order processes set point shown in Figure slab steady-state stirred-tank heater Suppose tank temperature thermal transfer function transmitter tube unit step unsteady-state valve pressure velocity