Page 131 - Practical Control Engineering a Guide for Engineers, Managers, and Practitioners
P. 131

106  Chapter  Fonr


                   to ~.--~  - ..  ~.~--~---~---~~~~~~-----~.-~.- .•  ~.~.~-~.--~~~~
                     1
                        ..














                                                   ......  I
                               0   '                 , .
                               .  '               .  '
                  to-2
                     to-J       to-2      to-I       tOO        to 1
                                     Frequency (Hz)
             FIGURE 4-31  Error transmission curve for integral-only control of pure dead-
             time process.













                ~ 1.5
                 .a
                 -~
                 ~  t


                   0.5                     ;  ... - .......  ;  .


                    0
                     0    0.05   O.t   O.t5   0.2   0.25   0.3   0.35   0.4
                                     Frequency (Hz)

             FIGURE 4-32  Error transmission curve for integral-only control of pure dead-
             time process (linear axes).
   126   127   128   129   130   131   132   133   134   135   136