Friday, November 18, 2011

Computer-oriented control system

Means that the system is controlled by computer(PC) or controller
Usually , it is for process control purposes


3 elements involved :




Types of computer-oriented control system
  1. DCS (Distributed control system)
  2. PLC (Programmable Logic Controller)
  3. PC (Personal Computer)
  4. Embedded controller


Computer




Dedicated-application system

  • Where the system is dedicated to perform a single task or a single group of tasks
  • Examples : Microwave, ECU, Calculator
  • A microcomputer/controller receives input information
  • Executes a sequence of instruction to process the information
  • Provides output

Example of Dedicated-application system

Engine status display system

  1. The input information (engine parameter: temperature, oil pressure,etc) is converted to an electrical quantity by some type of transducer.
  2. The electrical quantities are then converted to a digital form to be inputted to the microcomputer system (µC)
  3. The µC processes the input data
  4. Then outputs the information to the display panel


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