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Digital Control  (BER4113) Chapter 1
Some Advantages of Digital Controllers: ,[object Object],[object Object],[object Object],[object Object],Modern control system require control of numerous loops at the same time for example pressure, position, velocity and tension . INTRODUCTION
Types of Signals. ,[object Object],[object Object]
Types of Signals. ,[object Object],[object Object]
Digital signal  Continuous-time analog signal Continuous-time quantized signal Sampled data signal
Figure 1-2 A block diagram of a digital control system BLOCK DIAGRAM   OF   A DIGITAL CONTROL
BLOCK DIAGRAM   OF   A DIGITAL CONTROL Figure 1-3 Block diagram of a digital control system showing signals in binary or graphic form
Definitions of Terms. ,[object Object],[object Object],[object Object],[object Object]
[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Quantizing and Quantization Error ,[object Object],[object Object]
Quantizing . The standard number system used for processing digital signals is the binary number system. In this system the code group consists of  n   pulses.   FSR is the full-scale range  The quantization level  Q  is defined as the range between two adjacent decision points
[object Object],[object Object],The least significant bit is the quantization level Q
Quantization Error.   ,[object Object],[object Object],[object Object]
[object Object],[object Object],For a small quantization level  Q , the nature of the quantization error is similar to that of random noise. And, in effect, the quantization process acts as a source of random noise. In what follows we shall obtain the variance of the quantization noise. Such variance can be obtained in terms of the quantization level  Q . The probability distribution P(e) of signal e(t) shown in figure c
Data Acquisition, Conversion, And Distribution Systems ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
block diagram of a data-distribution system   A block diagram of a data-distribution system  Figure 1-5(a) shows a block diagram of a data-acquisition system
Computer Control ,[object Object],[object Object],[object Object]
Computer Control ,[object Object]

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digital control Chapter1 slide

  • 1. Digital Control (BER4113) Chapter 1
  • 2.
  • 3.
  • 4.
  • 5. Digital signal Continuous-time analog signal Continuous-time quantized signal Sampled data signal
  • 6. Figure 1-2 A block diagram of a digital control system BLOCK DIAGRAM OF A DIGITAL CONTROL
  • 7. BLOCK DIAGRAM OF A DIGITAL CONTROL Figure 1-3 Block diagram of a digital control system showing signals in binary or graphic form
  • 8.
  • 9.
  • 10.
  • 11. Quantizing . The standard number system used for processing digital signals is the binary number system. In this system the code group consists of n pulses. FSR is the full-scale range The quantization level Q is defined as the range between two adjacent decision points
  • 12.
  • 13.
  • 14.
  • 15.
  • 16. block diagram of a data-distribution system A block diagram of a data-distribution system Figure 1-5(a) shows a block diagram of a data-acquisition system
  • 17.
  • 18.