Princess Sumaya University Dr. Bassam Kahhaleh 3441 - Industrial Instruments 1 Princess Sumaya Univ. Electronic Engineering Dept. 3441 Industrial Instruments 1 Chapter 1 Introduction to Process Control Dr. Bassam Kahhaleh Dr. Bassam Kahhaleh

Introduction to Process Control Princess Sumaya University 3441 - Industrial Instruments 1 Introduction to Process Control Objective Introduce the overall process-control loop, its function, and its description.

Introduction to Process Control Princess Sumaya University 3441 - Industrial Instruments 1 Introduction to Process Control Process-Control Principles The Process

Introduction to Process Control Princess Sumaya University 3441 - Industrial Instruments 1 Introduction to Process Control Process-Control Principles Human-Aided Control

Introduction to Process Control Princess Sumaya University 3441 - Industrial Instruments 1 Introduction to Process Control Process-Control Principles Automatic Control

Introduction to Process Control Princess Sumaya University 3441 - Industrial Instruments 1 Introduction to Process Control Process-Control Block Diagram Control Element p e = r - b Process r ∑ Controller − b Measurement

Introduction to Process Control Princess Sumaya University 3441 - Industrial Instruments 1 Introduction to Process Control Control System Evaluation Stability Does the system become unstable, especially after reacting to a disturbance or other changes? Steady-State Regulation Transient Regulation

Introduction to Process Control Princess Sumaya University 3441 - Industrial Instruments 1 Introduction to Process Control Control System Evaluation Evaluation Criteria Damped Response Cyclic Response

Introduction to Process Control Princess Sumaya University 3441 - Industrial Instruments 1 Introduction to Process Control Analog & Digital Processing Data Representation Analog Data Digital Data (Binary) Data Conversion ADC DAC Resolution & Speed

Introduction to Process Control Princess Sumaya University 3441 - Industrial Instruments 1 Introduction to Process Control ON/OFF Control Control Element is either ON or OFF Relays Mechanical Solid-State

Introduction to Process Control Princess Sumaya University 3441 - Industrial Instruments 1 Introduction to Process Control ON/OFF Control Relays Mechanical

Introduction to Process Control Princess Sumaya University 3441 - Industrial Instruments 1 Introduction to Process Control ON/OFF Control Relays Mechanical

Introduction to Process Control Princess Sumaya University 3441 - Industrial Instruments 1 Introduction to Process Control ON/OFF Control Relays Mechanical

Introduction to Process Control Princess Sumaya University 3441 - Industrial Instruments 1 Introduction to Process Control ON/OFF Control

Introduction to Process Control Princess Sumaya University 3441 - Industrial Instruments 1 Introduction to Process Control Analog Control VQ Controller Heater Q Ve = Vr - VT Oven Vr ∑ Error detector T − VT Measurement

Introduction to Process Control Princess Sumaya University 3441 - Industrial Instruments 1 Introduction to Process Control Digital Control Supervisory Control VQ Heater Q Ve = Vr - VT Controller ∑ Oven Error detector T − VT Vr Measurement ADC Computer DAC

Introduction to Process Control Princess Sumaya University 3441 - Industrial Instruments 1 Introduction to Process Control Digital Control Direct Digital Control (DDC) VQ Heater Q DAC NQ Oven Computer T NT ADC Measurement VT

Introduction to Process Control Princess Sumaya University 3441 - Industrial Instruments 1 Introduction to Process Control Programmable Logic Controllers (PLC) Inputs & Outputs are AC level L L PLC N N

Introduction to Process Control Princess Sumaya University 3441 - Industrial Instruments 1 Introduction to Process Control Sensor Time Response First-Order Response b (t ) = bi + (bf – bi ) [ 1 – e – t / ] Second-Order Response R (t )  Ro e – t sin (2  fn t )

Introduction to Process Control Princess Sumaya University 3441 - Industrial Instruments 1 Introduction to Process Control End of Chapter 1