Implementation of gain scheduling for PI controllers

Started by Anonymous in comp.dsp2 months ago 11 replies

Hi, I'm designing a controller for a boost converter. I'm able to find a set of gains that fit for all situations, but I get a slow response at...

Hi, I'm designing a controller for a boost converter. I'm able to find a set of gains that fit for all situations, but I get a slow response at full-load. I was thinking instead of using gain scheduling, 1 set of gains for little to no load and 1 set of gain when load is significant (say more than 25% of the maximum load). Now my question. What are the gotchas about gain scheduling? In bo...


origin of "Bracewell interpolation"?

Started by Anonymous in comp.dsp2 months ago 2 replies

I can across a really old Fortran program with a subroutine that interpolates a 1D array of N samples to 3N samples. It uses a 5-point operator,...

I can across a really old Fortran program with a subroutine that interpolates a 1D array of N samples to 3N samples. It uses a 5-point operator, and the comments describe it as Bracewell method, spline approximation to sinc. I haven't seen this before. Bracewell's 1995 book on Two-Dimensional Imaging had a formula for 6 nearest points. Did he publish a formula for 1D interpolation with 5 po...


Microsoft is not the answer

Started by Anonymous in comp.dsp2 months ago

Microsoft is the question the answer is no!

Microsoft is the question the answer is no!


my geophysics CV

Started by David Dalton in comp.dsp2 months ago 3 replies

I just updated the Microsoft Word and PDF versions of my CV on my home page to reflect the fact that I got a Ph.D. at the end of May and to list...

I just updated the Microsoft Word and PDF versions of my CV on my home page to reflect the fact that I got a Ph.D. at the end of May and to list five new papers, but haven't yet updated the HTML version so I just deleted that for now. The direct link for the PDF version is http://www.nfld.com/~dalton/dalton-cv-web-2019.pdf Constructive criticism is welcome. Also I have put my Ph.D...


Researchers: Error-Correction Codes hold Spacetime Together

Started by Steve Pope in comp.dsp2 months ago 2 replies

Some articles in the pop-science press appeared this week on the topic; so I traced down a paper by the researchers. Interestingly, I heard a...

Some articles in the pop-science press appeared this week on the topic; so I traced down a paper by the researchers. Interestingly, I heard a similar idea floated in the 1990's, but apparently nothing was published at the time. https://arxiv.org/abs/1411.7041 Steve


region of convergence of z transform - why bother

Started by Anonymous in comp.dsp2 months ago 4 replies

Yes I understand the theory, left handed and right-handed sequences. we can= have two z transfer functions the same but one is left hand sided...

Yes I understand the theory, left handed and right-handed sequences. we can= have two z transfer functions the same but one is left hand sided and the = other right. A great deal is spent explaining this but exactly what is the use in the fi= rst place of left-handed sequences as they are non-causal. I see in countle= ss book examples of sequences going backwards in time - find the z-transfe...


Jeremiah Y Avins "Jerry"

Started by Anonymous in comp.dsp2 months ago 6 replies

I found out today that Jerry had passed away last April at the age of 85. (= 17 Apr 2018). Jerry was a true polymath and had been quite a...

I found out today that Jerry had passed away last April at the age of 85. (= 17 Apr 2018). Jerry was a true polymath and had been quite a frequent and k= nowledgeable contributor to comp.dsp. Without formal training in the field,= his ability to dig deep and reason out details was simply astounding. Jerr= y will be missed. Clay


machine learning vs interpolation

Started by Cagdas Ozgenc in comp.dsp2 months ago 19 replies

Greetings. I have been using neural networks and other machine learning tools for sometime time. Yesterday the following question popped up in...

Greetings. I have been using neural networks and other machine learning tools for sometime time. Yesterday the following question popped up in my mind however: Why do we use machine learning tools when we could achive similar results with plain interpolation? Let's assume a noise free regression scenario (not classification and no measurement errors). In the case of infinite samples and...


Rune Allnor

Started by Randy Yates in comp.dsp3 months ago 12 replies

Hello comp.dsp, I don't know if this is common knowledge, but, out-of-the-blue, I received an email from Trine-Lise Allnore, Rune's sister, on...

Hello comp.dsp, I don't know if this is common knowledge, but, out-of-the-blue, I received an email from Trine-Lise Allnore, Rune's sister, on 17-Nov-2018 which I quote below. Hi. I saw your question about my brother Rune, at a forum on the net. You postet It about 4-5 years ago, so you may not remember it.. Well, he comitted suicide in January 2012. You and another member of the ...


Help me please

Started by Saagar CD in comp.dsp3 months ago 5 replies

I know very few about communication protocols If I am to put my ideas practically, what hardware and software shall one need to create a small...

I know very few about communication protocols If I am to put my ideas practically, what hardware and software shall one need to create a small communication system. I am completely new to this. My wish is that I create a small communication system and transfer data.


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