An iterative analogue computer for use with resistance network analogues
I.C. Hutcheon · British Journal of Applied Physics · 1957
When field problems involving sources or sinks are solved using resistance network analogues, currents must be applied to the nodes of the network such that each current is a desired function of the associated node potential. This requires repeated re-adjustment of every current until each is correct. A method is described whereby the adjustments are made automatically by a scanning switch, a function generator, an a.c. amplifier, and a set of triode valves each connected to a network node and having a memory capacitor connected to its grid. The solution is thus achieved rapidly, and changing problems can be solved continuously. Suitably modified, the apparatus may find uses such as solving other differential equations or providing a set of non-linear resistors for fluid flow analogues.