CRYSTAL RATE DYRO
GULTON INDUSTRIES INC METUCHEN NJ
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Efforts are reported to fabricate a vibratory gyro to detect very low rates of turn. The field of endeavor fell into three phases. Phase I dealt with attempts to utilize piezo electric ceramics as the vibratory element. Various configurations and measurements are discussed in detail. The maximum output was 500 microv. at 360 sec with a zero rate of 3800 microv. without repeatability. Phase II was concerned with the use of lower frequency electro- mechanical vibratory elements in measuring the required angular rates. The results obtained from using the resultant crude tuning forks rate sensors are fully discussed. Using null circuitry at 0.5 rpm, an output of 2 volts was obtained for signal to noise ratio of 1. This was not repeatable without readjustment. Although far from satisfactory, the results of Phase II indicated the correct direction to continue. Phase III dealt with fabrications of precision tuning forks. The results achieved are discussed and solutions to problems are proposed. Under optimum conditions, the refined gyro was able to detect a rate of 1 revolution in 100 days.
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