VisSim/ModelWizard
VisSim/ModelWizard is a Windows
based
software program for developing high fidelity, dynamic models
of process plant subsystems or components from real-time plant
and historic data. Using VisSim/ModelWizard, process control
engineers and technicians can easily create models for tuning
controllers without spending days or weeks developing the
models.
The product consists of
a simple wizard interface combined with a set of sophisticated
algorithms. The underlying algorithms identify the key
frequencies of a system, even in the presence of noise, and
generate a mathematical model of optimal order, or
alternatively, of an order specified by the user. The software
is designed to produce models for single input/single output
(SISO) systems and is particularly well-suited for PID
controlled systems. These models can be easily configured with
other VisSim blocks (for example, PID control blocks) to
perform process simulation, off-line tuning (optimization) or
operator training.
"VisSim/ModelWizard is a very easy to
use tool. We have successfully used it in conjunction with
VisSim/RealTimePRO to reduce machine downtime caused by poor
controller performance. Using VisSim/ModelWizard we have
reduced the number of site visits required to solve the
control problem from two or more site visits to just one.
Furthermore, we have reduced machine downtime significantly
and now spend only three days to identify and correct the
problem as opposed to the 10 to 15 working days required
before using the VisSim/ModelWizard."
-- Richard A. Kolk, Senior Technical
Staff Engineer, Carrier Electronics/UTC
With
VisSim/ModelWizard, generating models
is simple. The wizard interface guides the user through an easy four
step process then automatically produces a VisSim transfer function
block that represents the system. The user can then connect
pre-configured VisSim PI, PD or PID blocks to the transfer function
block to create, simulate and tune the control system.
In
fact, with
VisSim/OptimizePRO,
a VisSim product option, a user can automatically calculate optimal
PID controller gains relative to user-defined parameters such as
rise-time, settling-time, overshoot and steady-state
error.
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