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I think you just haven't dived deep enough into control theory. Your criticism should be addressed, for instance, by introducing an appropriate Kalman filter. Y
by xvedejas 4y ago
I think you just haven't dived deep enough into control theory. Your criticism should be addressed, for instance, by introducing an appropriate Kalman filter. Yes, much of the truly interesting and powerful aspects of control theory are in its interaction with statistics.
- kqr 4y agoThe Kalman filter also assumes every data point conveys a signal of change, however small. That approach inevitably leads to reading tea leaves (interpreting noise as signal). It is more economical, in my experience, to start from the idea that unless there's been an actual consistent change in the process, any data you're getting reflects noise around the process mean. SPC is designed to tell those two cases apart.
- deleted 4y ago[deleted]
- krapht 4y agoI'm really struggling to follow along. Control theory is nothing but a set of math tools to derive controllers and filters. Just because most people stick to linear systems with gaussian noise doesn't mean you're limited to that. I'm not sure how a quality control methodology has anything to do with control theory in general.