A feedback control loop is used to control the temperature of a process fluid exiting a heat exchanger by manipulating t
Posted: Mon May 16, 2022 1:05 pm
A feedback control loop is used to control the temperature of a process fluid exiting a heat exchanger by manipulating the flow rate of cooling water. The transfer functions of the process (p) and other components of the feedback loop (Gm Gv and G c) are given as: Gp = -5/(10s +1). Gm = 1.5/3s +1), Gy=-0.05/(5s +1), Gorka The process has negative steady state gain, the control valve is a linear air-to-close valve, and a proportional controller with gain ke is used. Use the direct substitution method to determine the upper limit on the value of K for stability of the feedback control loop