1 Proportion al Integral Differenti al (PID) Control Proportional Control –Equation –Example • PI Control –Equation –Numerical Integration –Example • PID Control –Web Simulation –Equation –Numerical Differentiation –A 3-mode opamp controller –Industrial PID tuning • Summary
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1 Proportional Integral Differential (PID) Control Proportional Control –Equation –Example PI Control –Equation –Numerical Integration –Example PID Control.
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ProportionalIntegral
Differential (PID) Control
Proportional Control–Equation–Example
• PI Control–Equation–Numerical Integration–Example
9.8 For a proportional controller, the controlled variable is a process temperature with a range of 500 to 1300C and a setpoint of 73.50C. Under nominal conditions, the setpoint is maintained with an output of 50%. Find the proportional offset that results from a load change which requires a 55% output if the proportional gain is (a) .1 (b) .7 (c) 2.0 and (d) 5.0
http://www.expertune.com/ • DCS: Digital Control System. DCS refers to larger analog
control systems like Fisher, Foxboro, Honeywell, and Bailey systems. DCS's were traditionally used for PID control in the process industries, whereas PLC's were used for discrete or logic processing. However, PLC's are gaining capability and acceptance in doing PID control. Most utilities, refineries and larger chemical plants use DCS's. These systems cost from 20 thousand to millions of dollars.
• DCS systems by: ABB (http://www.abb.com/ ), Bailey, Foxboro (http://www.foxboro.com/industries/ ), Fisher, Moore, Honeywell, Yokogawa, etc.
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Matlab PID Tuning-1
http://www.mathworks.com/
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• Introduction• Proportional Control
– Equation– Example
• PI Control– Equation– Numerical Integration– Example
• PID Control– Web Simulation– Equation– Numerical Differentiation– A 3-mode opamp controller– Industrial PID tuning