Circuit Realization of a Square Root Sum of Squares Computer

摘要

An electronic system was developed to compute the square root of the sum of the squares for three input variables. The basic technique was to use a conventional triaxial accelerometer and to process the three input signals, giving as an output one waveform. This report covers specifically the design and evaluation of circuitry that (1) accepts input signals from the accelerometers during impact, and (2) computes an instantaneous magnitude of the acceleration-time curve continuously. The circuitry was determined operable over a dynamic range of 4 mv to 4 v, with a frequency response of 4 to over 4000 cps. A computational accuracy of within 5 percent has also been proved between 50 mv and 4 v; an accuracy to within 10 percent has been proved from 4 to 50 mv. (Author)