"Using PID Controllers to Tame the Diode Ladder Filter"
-- John G. Ziegler and Robert Moog
#controltheory
2025 is looking like a great year for work at the intersection of #categorytheory, #systemstheory, #controltheory, #machinelearning and #probabilitytheory, this thread will be a very biased collection of works (in no specific order) I'm hoping to read as soon as possible!
Starting with:
"Logical Aspects of Virtual Double Categories"
https://mastoxiv.page/@arXiv_mathCT_bot/113921693949589956
Simulation here it is, control theory is still hard :( Anyone knowledgeable about #controltheory and interested in helping me out with this? Basically i get a sampled signal of relative increments and need to map them to a nice acceleration curve.
Boosts appreciated :)
You could think of a tach signal as a pulse density modulation. Each clock period is an implicit sample. If the tach is ticking at 1/200,000 the clock speed, then for 200,000 consecutive clocks, there are 0 samples, then there's a single 1 sample.
So I can run that through a low pass filter and get a very low amplitude speed signal? Are there feasible digital filters that work when the cutoff frequency is orders of magnitude below the sample rate?
DSP and control theory tooters, how do you smooth a tach signal?
I'm measuring a sequence of tachometer pulses, and I want to turn that into a smoothed current speed number. Everything I know about DSP uses a fixed sampling interval, but these aren't fixed -- the interval is the signal.
This has to be a well known problem with well known solutions...
Thank you.
ModConFlex' first researchers started around August 2023. Our presently 13 #MSCA researchers are coming from fields of #engineering, #physics and/or #mathematics. They are hosted by eight different #universities for their PhD and meet at least once a year at our annual network and training events.
Their research focuses on a range of topics from #ArtificialIntelligence over #ControlTheory (applied to floating #WindTurbines or, more theoretical, port Hamiltonian systems) to #FlexibleAircraft.
Last 2024 publication within the #ModConFlex project:
"LQR control for a system describing the interaction between a floating solid and the surrounding fluid" on #mathematics of #solid moving on the #sea and #control acting on the solid.
Co-authored by #ModConFlex #MSCA researcher Zhuo Xu and published in Mathematical Control and Related Fields:
https://www.aimsciences.org//article/doi/10.3934/mcrf.2024039
Congratulations to Zhuo for his first #publication !
Convexity lies in the eye of beholder. A note on how nonlinear optimal control problems can be given a convex formulation using the continuity equation. https://hackmd.io/@TAzH1D5uSQO0ozb_mg0NRw/r1KEH2cNkg #controltheory
Any sliding mode control puns out there (I need cheering up with #controltheory whimsy)
Congratulations to #MSCA-Researcher Maddalen Irigoien, the winner of the #ModConFlex presentation prize 2024!
Maddalen's research focus is on modelling floating wind turbines. She started with the #mathematical groundwork in December 2023.
All #ModConFlex Researchers delivered excellent presentations at our 2024 #NetworkMeeting and we are happy to have such promising researchers on board of our #HorizonEU project.
Looking for a #PhDstudentPosition in #ElectricalEngineering / #AppliedMathematics in a friendly #international environment?
Check out https://modconflex.uni-wuppertal.de #EUhorizon project.
#modeling, #stabilityanalysis and #control of electric power grids, #controltheory,
Looking for this kind of confidence in a paper #systemstheory #cybernetics #controltheory
Tuning a PID controller can be quite tricky. In my new video, I demonstrate such tuning using #Python (so that you can see the graphs) for an inverted pendulum. Check it out!
👇👇👇
https://youtu.be/hRnofMxEf3Q
If you are just starting in #ControlTheory or need a refresher, check out my introduction to #PIDController video! I cover the basic theory and how they work.
👇👇👇
#introduction
We are a #HorizonEU #MSCA project with expertise in #ControlTheory, #ArtificialIntelligence, #ComplexDynamicalSystems, #DistributedParameterSystems, #FluidDynamics, #Aeroelasticity, #PowerElectronics, #PowerSystems and #MarineEngineering. Our aim is to train several #PhDStudent researchers in the modelling and control of flexible structures interacting with fluids, contributing to advances in control theory, artificial intelligence and energy-based modelling.
It's fun watching 2 control systems fight each other. My solar panel inverters are tracking the rapidly-changing power available on this day with lots of #fluffylittleclouds. The EV charger, with its sensor on the solar inverter's output, is tracking the available power to only charge from what's coming from solar.
My room fan speed is continously ramping up and down as the grid voltage wobbles.
Gosto deste mapa mental que por aí encontrei
#ControlTheory
A couple decades ago it occurred to me that the dynamics of disagreement often tend toward polarization rather than toward unification at a higher level of understanding.
Further, it seemed (to me) that this might be analogous to the behavior of a feedback loop out of control and going to one or the other of its extreme rails.
And further, this seemed (to me) to be the behavior of a system finding its lowest energy/information state, associated with lack of requisite variety.
This behavior seemed (to me) generalizable in principle across systems based on electronics, mechanisms, …, human individuals, and groups.
At that time I was active in a forum of Very Smart People, and when I ventured this observation/opinion it received no interest or engagement.
I'm wondering whether now, twenty years later, with polarization in politics being grossly apparent, whether anyone reading this might be able to recommend some sources of more extensive thinking on the question of such a general principle…?
#agreement #disagreement #polarization #systemsTheory #controlTheory #systemsThinking #politics #leastEnergy #leastInformation #requisiteVariety
A review on different applications of control ideas to neuroscience, #motorcontrol and #decisionmaking, using in particular #controltheory and #perceptual #control.
The description of perceptual control seems suspiciously close to Friston's #activeinference...
A review on the #senseofagency, which in general is != #agency, but does share some commonalities, both ideological and methodological ones, see for example "theories of the sense of agency" where the #comparatormodel is none other than a portion of a #feedback #loop from #controltheory (the diagrams in this paper are admittedly quite weird though).
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