| Summary: | 碩士 === 國立成功大學 === 電機工程研究所 === 84 === This thesis first proposes digitally redesigned dual- rate
controllers. Owing to the characteristics of various systems
are different, it is not the optimal response of affairs to
reduce the original sampling period by half. So we develop the
dual-rate sampling, ie, join a tuningly sampling point between
the original sampling period. By the dual-rate sampling
together with the principle of equivalent areas, the discrete-
time input signals are exactly evaluated such that the desired
digitally redesigned feedback gain and forward gain will be
obtained. Furthermore, we present an efficient digital redesign
method by the improved block-pulse function approach and by the
dual-rate sampling for inputtime- delay systems. One can find
the state responses of continuous-time system will closely
match those of the digitally redesigned system by selecting the
tuning parameters N and i with the smallest different error. By
dual-rate sampling,the coefficients of the block-pulse function
expansion are exactly evaluated by integrating both sides of
the continuous-time designed closed-loop system such that the
desired digitally redesigned feedback gain and forward gain
will be obtained.
|
|---|
