Is there any way to do matrix/vector algebra with analog electrical components? Only addition, subtracting and multiplying.
I'm going to build a Linear-Quadratic-Gaussian(LQG) Controller.
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\$\begingroup\$ There's ISAAC. At 2:31 you'll see some matrix stuff. Neo is awesome. Here's the paper. \$\endgroup\$ – Harry Svensson Jul 22 '17 at 1:33
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\$\begingroup\$ These things used to be done before digital computers became fast and reliable and inexpensive. Before my time. But guidance systems used to be implemented with amplifiers and performed these types of operations. I think you should explain why you want to do this and what your ultimate goal is. Explain why you wouldn't just use a digital computer. \$\endgroup\$ – mkeith Jul 22 '17 at 3:50
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\$\begingroup\$ For analog voltage multiplication, this might be a good hint for you. \$A×B = e^{ln(A)+ln(B)}\$, and a diode has an exponential curve at its knee... \$\endgroup\$ – Harry Svensson Jul 22 '17 at 13:16
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\$\begingroup\$ They have voltage multipliers. The problem is each addition or multiplication stage will add noise which will be gained up by each successive stage. Thats why we convert things to digital signals, because there is very little noise almost none \$\endgroup\$ – Voltage Spike♦ Jul 23 '17 at 2:20
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\$\begingroup\$ Thank you for the answer. Now I know that I must use a digital chip to do that. \$\endgroup\$ – Daniel Mårtensson Jul 23 '17 at 10:38
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