bob012345
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It's coming from Germany and should be here any day now . The Analog Thing (THAT) is limited so probably only does simpler systems but I checked the online manual and it seems to do several simpler chaotic equationshutchphd said:That sounds like bunches of fun. Can you program (or interest someone else in programming) the planar elastic pendulum? How does it I/O ?
https://the-analog-thing.org/docs/dirhtml/rst/applications/elegant_chaos/alpaca_15/
The double pendulum requires ten integrators, 15 summers, 16 multipliers, and 17 coefficient potentiometers. Each THAT has 5 integrators, 4 summers, 2 multipliers and 8 coefficient pots which would require 8 THAT's so not doable in one but it can be done in an LTSpice simulator which of course can have an arbitrary number of elements and is free. Here is the setup
https://the-analog-thing.org/docs/dirhtml/rst/applications/double_pendulum/alpaca_21/
The elastic pendulum should be doable in LTSpice but I am a bit worried about the variables in the denominator for these equations. It may be a simple fix to just multiply by the denominator and rearrange the equations into products rather than divisions. I'd be willing to try it.
As far as outputs, it can be hooked to a scope or a PC with a simulated scope;
https://the-analog-thing.org/docs/dirhtml/rst/computing_elements/THAT_elements/outputs/
EDIT: Of course one could make more integrators, summers and inverters with some op amps and breadboards ect. to add to the system as well as buy some analog multiplier chips.
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