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Periodical Getter Cleaning of the Gas Environment Inside a Device
Engineering Education # 06, June 2014
DOI: 10.7463/0614.0715485
Application of adhesives and sealants in assembly technology of modern vacuum electro-mechanical devices allows connecting parts of different materials and significantly reduces the cost of products. However, outgassing of the adhesive joints deteriorates the vacuum inside the devices and limits their service life. Prolonged vacuum outgassing adhesive joints at elevated temperatures solves this problem but labor intensity of this operation prevents its use in mass production. For devices which are switched on relatively rare or once the desired vacuum level can be achieved by switching the getter directly before use. A short-time heating of the getter removes the main residual gas component - the hydrocarbons from the inner atmosphere of a vacuum device and provide the its functionality for a long time interval. An additional internal outgassing adhesive joints in the process of manufacturing the device is not required.
Balancing of metallic resonators of cylindrical vibratory gyroscopes for low and medium accuracy applications
Engineering Education # 06, June 2013
DOI: 10.7463/0613.0579179
A new technology of balancing geared metal resonators of cylindrical Coriolis vibratory gyroscopes (CVG) for strap down inertial navigation systems of low and medium accuracy was proposed. Removal of an unbalanced mass from the teeth surfaces was performed by a high-precision electrochemical method. The proposed balancing algorithm allows to eliminate lower forms of mass defect, one by one or simultaneously, affecting the instrument operation. The algorithm does not require complex calculations when determining the mass removed from the teeth, and it could be used with any number of teeth on the edge of a resonator. The developed technology of balancing can be easily implemented and automated, it does not require expensive equipment.
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