Digital Control Systems 论文

详细信息

发表日期

2001-12-13

发表年份

2001

摘要

In this chapter we begin to develop the skills necessary for designing and implementing advanced controllers. Since virtually all controllers at this level are implemented using digital microprocessors, we spend some time developing the models, typical configurations, and tools for analysis. When we compare analog and digital controllers, we notice two big differences: Digital devices have limited knowledge of the system (data only at each sample time) and limited resolution when measuring changes in analog signals. There are many advantages, however, that tend to shift the scales in favor of digital controllers. An infinite number of designs, advanced (adaptive and learning) controller algorithms, better noise rejection with some digital signals, communication between controllers, and cheaper controllers are now all feasible options. To simulate and design digital controllers, we introduce a new transform, the z transform, allowing us to include the effects of digitizing and sampling our signals.