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- 주제분류
- 공학 >전기ㆍ전자 >전기전자공학
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- 강의학기
- 2017년 1학기
- 강의계획서
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Control systems are, nowadays, implemented by means of computers or DSPs. The use of processors in the loop has several advantages and some disadvantages.
+ Controllers are easily implementable, and can be tuned on-line.
+ Controllers are small (and cheap).
+ Complex controllers (i.e. controllers performing several operations) can be easily
implemented.
+ Controller design can make use of symbolic SW tools.
+ Processors can be used to implement monitoring and safety tasks.
- The closed-loop system contains continuous-time components and discrete-time components (and interfacing devices): it is a hybrid system.
- The analysis of the closed-loop system is often based on approximations.
- Digital controllers are very sensible to numerical errors.
- Controller design is more involved and (often) non-intuitive.
- The notion of frequency for discrete-time systems is non-intuitive.