Lesson
12
P-I-D Control
12
P-I-D Control
Instructional Objectives
At the end of this lesson, the student should be able to:
• Write the input-output relationship of a P-I-D controller
• Explain the improvement of transient response in closed loop with P-controller
• Explain the presence of offset in presence of simple P-controller
• Define Proportional Band
• Explain the elimination of steady state error with Integral Control.
• Define the error transfer function and compute steady state error
• Explain the advantages of P-I controller over simple P and I actions
• Explain the effect of P-D controller
• Recommend a suitable controller configuration for a particular process.
Introduction
In the last lesson, a brief introduction about a process control system has been given. The basic control loop can be simplified for a single-input-single-output (SISO) system as in Fig.1. Here we are neglecting any disturbance present in the system.
At the end of this lesson, the student should be able to:
• Write the input-output relationship of a P-I-D controller
• Explain the improvement of transient response in closed loop with P-controller
• Explain the presence of offset in presence of simple P-controller
• Define Proportional Band
• Explain the elimination of steady state error with Integral Control.
• Define the error transfer function and compute steady state error
• Explain the advantages of P-I controller over simple P and I actions
• Explain the effect of P-D controller
• Recommend a suitable controller configuration for a particular process.
Introduction
In the last lesson, a brief introduction about a process control system has been given. The basic control loop can be simplified for a single-input-single-output (SISO) system as in Fig.1. Here we are neglecting any disturbance present in the system.
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