3 ms·

Welcome computer scientists to the bleeding edge control scheme of the 1920’s. Teasing apart, it always amazes me how slow the diffusion of innovation is acros

Welcome computer scientists to the bleeding edge control scheme of the 1920’s. Teasing apart, it always amazes me how slow the diffusion of innovation is across different fields.

MuffinFlavored 4y ago
What's a more modern way to control an internal combustion engine + forced induction (turbo charger) than PID?
- boojums 4y ago
  My understanding is that PID does not work as well for Mulitple Input Multiple Output systems compared with "modern control theory." See the "Analysis techniques - frequency domain and time domain" and "Classical SISO System Design" sections of below Wikipedia article. https://en.m.wikipedia.org/wiki/Control_theory https://en.m.wikipedia.org/wiki/Control_theory
- whatever1 4y ago
  There is a lot of literature if you search the terms dynamic matrix control, optimal control theory, model predictive control, reinforcement learning. The main idea is that control problems can be posed as optimization problems where we try to achieve some goal (financial / stability etc) while satisfying some hard restrictions. For example try to change lines gracefully and fast on the highway without crashing on another car. For your particular case, if you want something dirt cheap (computationally) and reliable then the PID is a great first step.
outworlder 4y ago
> Teasing apart, it always amazes me how slow the diffusion of innovation is across different fields. I had been dabbling with electronics for a while, so I had heard of PID controllers (as black boxes). Never really thought of them outside of that. The first time it clicked for me that this could have applications in other fields was when playing a game. Stationeers, to be precise. Sure, the PID controller that a user is created was controlling a device in the game, but the actual code was implemented in 'assembly' and very simple to understand. That led me to think that I could use that in place of our simpler autoscalers at work. I have not implemented a solution, but that's how the gears started to turn. Reading this thread, apparently the field has advanced far past PID controllers. Now it's yet another rabbit hole to go through...

Welcome computer scientists to the bleeding edge control scheme of the 1920’s. Teasing apart, it always amazes me how slow the diffusion of innovation is across different fields.

MuffinFlavored 4y ago

What's a more modern way to control an internal combustion engine + forced induction (turbo charger) than PID?

boojums 4y ago
My understanding is that PID does not work as well for Mulitple Input Multiple Output systems compared with "modern control theory." See the "Analysis techniques - frequency domain and time domain" and "Classical SISO System Design" sections of below Wikipedia article. https://en.m.wikipedia.org/wiki/Control_theory https://en.m.wikipedia.org/wiki/Control_theory
whatever1 4y ago
There is a lot of literature if you search the terms dynamic matrix control, optimal control theory, model predictive control, reinforcement learning. The main idea is that control problems can be posed as optimization problems where we try to achieve some goal (financial / stability etc) while satisfying some hard restrictions. For example try to change lines gracefully and fast on the highway without crashing on another car. For your particular case, if you want something dirt cheap (computationally) and reliable then the PID is a great first step.

outworlder 4y ago

> Teasing apart, it always amazes me how slow the diffusion of innovation is across different fields. I had been dabbling with electronics for a while, so I had heard of PID controllers (as black boxes). Never really thought of them outside of that. The first time it clicked for me that this could have applications in other fields was when playing a game. Stationeers, to be precise. Sure, the PID controller that a user is created was controlling a device in the game, but the actual code was implemented in 'assembly' and very simple to understand. That led me to think that I could use that in place of our simpler autoscalers at work. I have not implemented a solution, but that's how the gears started to turn. Reading this thread, apparently the field has advanced far past PID controllers. Now it's yet another rabbit hole to go through...