[Bruce Nevin 2018-09-11_11:02:21 ET]
A side note to the PID discussion:Â
Cruise control is one of our stock examples (alongside the thermostat) to introduce concepts of control. The Wikipedia article https://en.wikipedia.org/wiki/PID_controller says that cruise control systems are PID controllers. Is this true?
A patent search on “cruise control” returns hundreds of patents, most of them relatively recent in the quest for autonomous vehicles (and many of those involving other aspects of vehicle control in combination with speed).
https://patents.justia.com/patents-by-us-classification/701/93
Here’s the original 1950 patent:
https://patents.google.com/patent/US2519859Â
This was the system marketed as cruise control and made standard equipment beginning with Chrysler in 1958 and really taking off with the oil embargo in 1973. Here’s the story behind it, with some explanation of how it worked:
https://www.smithsonianmag.com/innovation/sightless-visionary-who-invented-cruise-control-180968418/
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On Mon, Sep 10, 2018 at 9:32 PM Richard Marken csgnet@lists.illinois.edu wrote:
[Rick Marken 2018-09-10_18:31:20]
I meant to say:Â
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RM: So these are nice demos Bruce. How about using them to see if the PCT model deals better with a time varying feedback function compared to the PID model. If it does, that could be a nice piece of information for roboticists whose robots have to control in a world of constantly changing feedback functions.Â
Best
RickÂ
–
Richard S. MarkenÂ
"Perfection is achieved not when you have nothing more to add, but when you
have nothing left to take away.�
                --Antoine de Saint-Exupery