A SIMPLIFIED ELECTRONIC TRACKING APPARATUS (SETA)

摘要

This report describes a simplified electronic tracking apparatus (SETA) which is compact, economical, and portable. The subject's task is to keep the pointer of a zero-center meter at the null point by manipulating a control device. The movements of the meter-pointer for which the subject attempts to compensate are introduced by a voltage across a potentiometer driven by a rotary cam. This volt¬age is compared with a corresponding voltage generated by the subject. This com¬parison is made by one of three K2X Phil brick operational amplifiers in cascade. The output of the comparison is simply the sum of the voltages, or error. Error is then introduced to the subject's display and to a second amplifier, which recti¬fies it, resulting in an output of absolute value of the error which is integrated by the third amplifier and displayed on a voltmeter on the experimenter's console.