VisSim/Analyze 
VisSim/Analyze lets you perform a frequency domain analysis of
a VisSim model or subsystem. It helps answer the question... "Is this
a stable system ?"
VisSim/Analyze approximates the dynamics of a
nonlinear system by linearizing the system about a specified operating
point. Linearized systems can be represented in ABCD state space or transfer
function form. With VisSim Analyze, you can easily access transfer function
information, edit zeroes and poles and compute Nyquist, Bode and root
locus plots.
You can then
design a controller for a plant model by interactively editing compensator
zeroes and poles, then observe their combined behaviour in Bode and root
locus plots. Once the desired responses are obtained, the pole placement
controller block is simply inserted into a VisSim diagram.
The preliminary pole placement controller is then
connected to a plant model creating a feedforward or a feedback control
loop. A simulation is run in VisSim and the results of the simulation
can be viewed easily in the form of plots. The stability of the closed
loop system can then be determined using Nyquist plots.
VisSim/Analyze lets you analyse system models or their subsystems and
obtain state-space representation and pole-zero locations for complex
systems. When frequency domain analysis is required, VisSim/Analyze generates
Bode, Nyquist and root locus plots.
VisSim/Analyze also features a
compensator design capability that allows you to design feedback control
systems interactively. You edit the poles and zeros of the compensator
transfer function in a floating window. In return, VisSim/Analyze automatically
updates the Bode and root locus plots of the combined plant-compensator
system to reflect the effects of the pole and zero manipulation. Once
you attain the desired response characteristics, you can place the compensator
in the VisSim diagram.
Features
- Approximates the dynamics of a nonlinear system
by linearizing the system about a specific operating point
- ABCD state-space matrix form (screen display
or .M/.MAT file exportation)
- Numerical perturbation for creating SISO ABCD
state-space linearization
- Calculates transfer function information, including
numerator and denominator polynomials in the powers of the s-plane;
gain, zeros, and poles locator; and cleansing of numerical round-off
errors
- Computes Bode phase/magnitude, root locus and
Nyquist plots
- Interactive compensator design
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