Because it generally requires absurdly high gains, and loop closing
frequencies well above the points where the plant model is no longer
You may be able to make a very high-order deadbeat controller that's
robust, by padding it's response enough to bring the loop closure
frequencies down -- this would be an interesting research topic.
Keeping it deadbeat in real life would undoubtedly require an adaptive
Polytechforum.com is a website by engineers for engineers. It is not affiliated with any of manufacturers or vendors discussed here.
All logos and trade names are the property of their respective owners.