VisSim/Analyze – Add-On

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 zeros and poles; and compute Nyquist, Bode, and root locus plots.

Interactive Controller Design

Designing a controller for a plant model is performed interactively by editing compensator zeros and poles, and observing the combined controller-plant behavior in Bode and root locus plots. Once the desired responses are obtained, the resulting controller block is simply inserted into a VisSim diagram.

The preliminary pole placement controller is 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 are easily viewed in graphical plots. The stability of the closed-loop system can then be determined using Nyquist plots.

Compensator Design

VisSim/Analyze also features a compensator design capability that lets you interactively design feedback control systems. 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.

Analysis of Discrete Transfer Functions

VisSim/Analyze supports analysis of discrete transfer functions. This lets you effectively handle the most general closed-loop system scenarios where a plant is modeled as a continuous dynamic system and the controller is a discrete (sampled data) system suitable for easy implementation on micro-controller hardware.


  • Approximates the dynamics of a nonlinear system by linearizing the system about a specific operating point
  • Generates ABCD state-space matrix (screen display or .M/.MAT file exportation)
  • Performs numerical perturbation for creating SISO ABCD state-space matrices
  • 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 and magnitude plots, root locus plots, and Nyquist plots
  • Provides interactive compensator design
  • Analyzes discrete transfer function
  • Generates gain and phase margin


VisSim Bode plot

Bode plot of 11th order Butterworth filte

Root Locus VisSim chart

Root Locus plot of 11th order Butterworth

The Next Steps

Ready To Buy?

Featured Downloads

What do our Customers say about us?

It was about as perfect as a teaching seminar could be. Moved at the correct pace and encompasses a good amount of information

I am very grateful for your prompt and kind answers to my problems. It is rarely a pleasure to complain about something, but this time it has been both pleasant and helpful. I can only regret that I did not use Swedish with Linda, men vi kan s

HV, Helsinki, Finland

I would like to sincerely thank you for your extremely prompt and efficient service – much appreciated and rare these days.

SA, Sheffield, UK

Bob’s performance was outstanding – a real credit to the company.

For the time being we are unable to offer the following product ranges although we are currently working hard to increase the number of products we can offer in the future. Please contact us to talk about alternative products that we may be able to offer you.