Persamaan jenis transistor AF 18164/11/2023 HistoryĬloseup of the London Science Museum’s difference engine showing some of the number wheels and the sector gears between columns. The historical difficulty in producing error-free tables by teams of mathematicians and human “computers” spurred Charles Babbage’s desire to build a mechanism to automate the process. Most mathematical functions commonly used by engineers, scientists and navigators, including logarithmic and trigonometric functions, can be approximated by polynomials, so a difference engine can compute many useful tables of numbers. The name derives from the method of divided differences, a way to interpolate or tabulate functions by using a small set of polynomial coefficients. The design has the same precision on all columns, but when calculating polynomials, the precision on the higher-order columns could be lower.Ī difference engine is an automatic mechanical calculator designed to tabulate polynomial functions. ![]() ![]() The London Science Museum’s difference engine, the first one actually built from Babbage’s design.
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