Control for Hard Cases: Zero-Shaping
PIDZST Command Includes Self-Tuning
Bellevue, WA, March 21, 2008 -- Does your process control application respond well to derivative and zero-shaping strategies in classic PID control, but your process changes over time so that it is not possible to get the full benefit from these features? Microstar Laboratories – maker of Data Acquisition Processor (DAP) boards for PC-based applications – may have something for you. The company now has available control software for systems that need frequent loop-tuning adjustments to track command-level changes consistently, to avoid poorly damped oscillations, and to maintain a good response time as conditions change. Ordinary derivative gain can become less effective or in some cases aggravate a tendency to oscillate when a control loop is poorly tuned. Applying a "zero shaping" gain on the command input – as done in the
A new self-tuning PID command,
You can use off-the-shelf components to build a control system that tunes itself. Every DAP board runs DAPL, and any DAP board can execute the
You now can be free from the ongoing operating costs of stubborn control loops that tend to oscillate or overshoot and that require continual hands-on tuning. You can start right away to prove to your own satisfaction that you can build a self-tuning control system for your application from off-the-shelf components. You can read the supporting documentation online and download all the software you need. And you can order hardware for evaluation at no charge. Contact Microstar Laboratories for details.
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Some processes change over time, so that it is hard to apply the PID approach and its extensions without continual tuning: what was a good tuning degrades into one that tends to oscillate, overshoot, or respond slowly. If your application faces these issues, you may want to take a look at new control software available from Microstar Laboratories – maker of Data Acquisition Processor (DAP) boards for PC-based applications. You now can use off-the-shelf components to build a control system for hard-to-control processes. And the system tunes itself. Every DAP board runs a real-time operating system, DAPL, that you control from PC software. A new DAPL command – PIDZST, a self-tuning PID control algorithm with zero-shaping – keeps your system in full control during the self-tuning cycles, never interfering with feedback processing. You can read all the supporting documentation online, you can download all required software, and you can order evaluation hardware at no charge. So you can see for yourself almost right away how you could build into your application a control loop that tunes itself.
Note to the Editor:
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PID control action and system response after automatic tuning by
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