Adaptive Environment Simulation
and Test Control
An environmental simulation and test is used
to determine a product's ability to perform during or
after exposure to a specific environment. These tests
are often used to prove product integrity, verify operational
limits, determine warranty terms, and prepare procedures
for safe operations.
CyboSoft offers an innovative Model-Free
Adaptive (MFA) control solution for controlling
environmental test equipment without having to tune
controller parameters. Climatic chambers, rapid thermal
processing (RTP) chambers, wind tunnels, dynamic simulation
and testing apparatus all have critical control loops.
The MFA controllers can tightly control these critical
loops and can adapt to new test conditions so that tedious
and costly manual tuning of controller parameters can
Why is Environment Test Control Difficult?
Components and products may be used in different
environments during their lifetime. To ensure their
operability in severe conditions, simulation of environmental
conditions ranging from high temperature and humidity
to a cold and dry atmosphere might be required. Components
and systems requiring environmental testing include
engines, turbines, compressors, motion systems, vehicles,
aircraft, aerospace materials, semiconductor equipment,
mechanical systems, and robotics.
Since environmental tests require establishing certain
stable test conditions, an automatic control system
to control all critical process variables is important.
However, when the environmental conditions vary from
test to test, the process dynamics may vary significantly.
If PID controllers are used, frequent manual tuning
of controller parameters is required, resulting in low
efficiency and a waste of time and resources.
MFA Controller vs. PID Controller
The following trends shown demonstrate MFA
(top) and PID (bottom) controllers are controlling 2
identical second order processes. As we begin, both
are controlling well. Then, we change the processes
to second order plus delay processes. Due to the large
delay time, both control systems start to oscillate,
but the MFA is able to quickly adapt to provide good
control, while the PID will continue to oscillate. When
the setpoint is changed again, there is no oscillation
and MFA continues to provide good control.
This demonstration shows the adaptive capability of
(single-input-single-output) MFA controller that is
ideal for environmental simulation and test control.
MFA controllers are ideal for environmental
simulation and test control. Avoiding process models
means lower development costs and faster time to market,
more robust and precise control means better lab test
results, and no manual tuning means lower operating
costs and longer up time.
This general-purpose, powerful solution can be easily
implemented. No special knowledge or experience with
advanced control or process modeling is required. Tedious
manual tuning of controllers can be eliminated allowing
the user to focus on R&D, design, proto-typing,
controller video 1.6MB
Shockwave plug-in required )