Electromechanical sine/cosine generator
Abstract
An electromechanical device is described for generating both sine and cosine functions. A motor rotates a cylinder about an axis parallel to and a slight distance from the central axis of the cylinder. Two noncontacting displacement sensing devices are placed ninety degrees apart, equal distances from the axis of rotation of the cylinder and short distances above the surface of cylinder. Each of these sensing devices produces an electrical signal proportional to the distance that it is away from the cylinder. Consequently, as the cylinder is rotated, the outputs from the two sensing devices are the sine and cosine functions.
 Publication:

National Aeronautics and Space Administration Report
 Pub Date:
 November 1974
 Bibcode:
 1974nasa.rept.....F
 Keywords:

 Electric Generators;
 Electromechanical Devices;
 Pulse Amplitude;
 Sine Waves;
 Cosine Series;
 Electric Pulses;
 Patents;
 Rotating Cylinders;
 Signal Generators;
 Electronics and Electrical Engineering