Web-Based Control System Analysis and Design

Feedback Interconnection

DESCRIPTION:

The function builds a system with feedback connection of two LTI models.

In this function, Sys1 is the plant, and Sys2 is feedback controller. It's important that all inputs and outputs of Sys2 should be connected to plant Sys1.

In order to obtain the feedback connection model Sys, the user needs to fill out the subsystem interconnection form which specifies how two susbsystems are connected. The first line of the form specifies the input indices of Sys1 which are involved in the feedback loop. The second line of the form specifies the output indices of Sys1 which are involved in the feedback loop.

Following general diagram shows how the form is filled out for a certain feedback connection of two LTI models.

Example1.
System 1:
A matrix=


B matrix=


C matrix=


D matrix=



System 2:
Numerator inputs:
s +

Denominator inputs:
s^(3) + s^(2) + s +

Subsystem interconnection:
Input the feedin index of system1 =
Input the feedout index of system1 =

Please choose models for two systems:

System type:

          Continuous-time.
          Discrete-time with the sampling time of second
System 1:
  1. Transfer-function (specify the number coefficients of numerators and denominators below) 
       Numerator number :   Denominator number :
  2. Zero-Pole-Gain (specify number of zeros and poles below) 
       Zero number :   Pole number :
  3. State-space (specify matrix dimension for A,B,C and D below) 
        Dimension of matrix A: X 
        Dimension of matrix B: X 
        Dimension of matrix C: X 
        Dimension of matrix D: X
System 2:
  1. Transfer-function (specify the number coefficients of numerators and denominators below) 
       Numerator number :   Denominator number :
  2. Zero-Pole-Gain (specify number of zeros and poles below) 
       Zero number :   Pole number :
  3. State-space (specify matrix dimension for A,B,C and D below) 
        Dimension of matrix A: X 
        Dimension of matrix B: X 
        Dimension of matrix C: X 
        Dimension of matrix D: X
Connection number:
The number of inputs of Sys1 which are involved in the feedback loop:
The number of outputs of Sys1 which are involved in the feedback loop:

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