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ELG4157: Digital Control Systems - uOttawa

elg4157 : Digital Control Systems Discrete Equivalents Z-Transform Stability Criteria Steady State Error Design of Digital Control Systems 1 Advantages and Disadvantages Improved sensitivity. Use Digital components. Control algorithms easily modified. Many Systems inherently are Digital . Develop complex math algorithms. Lose information during conversions due to technical problems. Most signals continuous in nature. Digitization The difference between the continuous and Digital Systems is that the Digital system operates on samples of the sensed plant rather than the continuous signal and that the Control provided by the Digital controller D(s) must be generated by algebraic equations. In this regard, we will consider the action of the analog-to- Digital (A/D) converter on the signal.

Most control systems today use digital computers (usually microprocessors) to implement the controllers). Some applications are: Digital Control Improves Sensitivity to Signal Noise. Analog electronics can integrate and differentiate signals.

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