Digital Amplitude Optimum [Digitales Betragsoptimum (BOD)]
with symbolic definition of plant and control structure. 


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The use of the symbolic definition of the structure is based on the 
definitions by MATLAB m-file connect.m (MATLAB Control System Toolbox).
Additionally there are a few further definitions necessary only.
This definitions are included as comments in struc000.m. The m-File 
struc999.m is prepared as "blank" for the definition of user structures.
The optimization has to be started by bod_es.m. Using symbolic structure 
definition there are the following m-files necessary for computation:
 
Directory SYMDEF: bod_es.m, bod_esg.m;   bod_esp.m (in special case).


The Toolboxes Control System and Optimization have to be installed and the 
BOD-Toolbox m-Files minreal.m, trans.m have to be present.
The following table lists some example m-files with structure definition and
attached simulation models:


 Structure             Function                                  SIMULINK
 definition                                                      model
 Directory                                                       DIRECTORY  
 SYMDEFS                                                         SYMDEFM


 struc000.m  Cascade structure 1;  3-loops                       sist000.m
 struc001.m  Cascade structure 2a; 2-loops                       sist001.m
 struc002.m  Cascade structure 2b; as 2a but pol-compensation    sist001.m
 struc010.m  Single control structure 1a
             PI-controller; undelayded input signal              sist010.m
 struc011.m  Single control structure 1b
             PI-controller; delayded input signal                sist010.m
 struc012.m  Single control structure 2a
             PID-controller; undelayded input signal             sist010.m
 struc013.m  Single control structure 2b
             PID-controller; delayded input signal               sist010.m
 struc020.m  State control structure 1;       
             computation of 3 coefficients                       sist020.m
 struc021.m  State control structure 2;       
             computation of 4 coefficients                       sist021.m
 struc030.m  Single control structure 3; dead time forward       sist030.m
 struc031.m  Single control structure 4a;
             various dead times, undelayded input signal         sist031.m 
 struc032.m  Single control structure 4b;
             various dead times, delayded input signal           sist031.m
 struc041.m  Single control structure 5; 
             with switching of the computations                  sist041.m


Alternatively the computation of controller parameters according the "Digital 
Amount Optimum [Digitales Betragsoptimum (BOD)]" may be done by the m-files 
bod.m or bod_gen.m (for single control structures), kaskade.m (for cascade 
control structures) or zust_au1.m (example for state control structure 1), 
zust_bran_2.m (example for state control structure 2).
However using the possibility of symbolic structure definition forces an 
uniform procedure for single, cascade and state control loops. Additionally, 
connections between computation algorithm and user structure according example 
bran_au.m for state control structeres are omitted. An further advantage is the 
better flexibility concerning the use of switches, i.g. for control structure, 
pre-filters or computation sequence.
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Questions and comments please send to:
Dr. G.-H. Geitner
E-Mail: Gert-Helge.Geitner@tu-dresden.de
Address: TU Dresden Fak. EuI, ETI
         D-01062 Dresden, Germany
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Reference:
G.-H. Geitner:	Entwurf digitaler Regler für elektrische Antriebe.
		VDE-Verlag GmbH Berlin und Offenbach 1996
		ISBN 3-8007-1847-2
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WWW-Sites:
http://eeiwzg.et.tu-dresden.de/ae2_files/ae_1_2.htm   This text in German
http://eeiwzg.et.tu-dresden.de/ae2_files/ae_1.htm     Digitales Betragsoptimum