A transport delay simulator using digital techniques

This transport delay simualtor was designed to extend the facilities of an analogue computer when used, in particular, for plant simulation purposes. An abridged performance specification is given in the Appendix which shows that this delay simulator has compatible performance with a wide range of modern analogue simulator equipment. Its principle of operation, chosen after consideration of several alternatives, is based on sampling and digital storage. The store comprises m.o.s. integrated-circuit shift registers. Linear interpolation is used to minimize the sampling rate and storage capacity required to achieve the specified accuracy. An alternative mode of operation is as a function generator, the ordinates of the given function being initially written into the store from punched paper tape or an analogue signal source.