Categories &

Functions List

Function Reference: mktito

Function File: P = mktito (P, nmeas, ncon)

Partition LTI plant P for robust controller synthesis. If a plant is partitioned this way, one can omit the inputs nmeas and ncon when calling the functions hinfsyn and h2syn.

Inputs

P
Generalized plant.
nmeas
Number of measured outputs v. The last nmeas outputs of P are connected to the inputs of controller K. The remaining outputs z (indices 1 to p-nmeas) are used to calculate the H-2/H-infinity norm.
ncon
Number of controlled inputs u. The last ncon inputs of P are connected to the outputs of controller K. The remaining inputs w (indices 1 to m-ncon) are excited by a harmonic test signal.

Outputs

P
Partitioned plant. The input/output groups and names are overwritten with designations according to [1].

Block Diagram

 
 min||N(K)||             N = lft (P, K)
  K         norm

                +--------+  
   w = u1 ----->|        |-----> z = y1
                |  P(s)  |
   u = u2 +---->|        |-----+ y = y2
          |     +--------+     |
          |                    |
          |     +--------+     |
          +-----|  K(s)  |<----+
                +--------+

                +--------+      
   w = u1 ----->|  N(s)  |-----> z = y1
                +--------+

Reference

  1. Skogestad, S. and Postlethwaite, I. (2005) Multivariable Feedback Control: Analysis and Design: Second Edition. Wiley, Chichester, England.

Source Code: mktito