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Aerospace engineering

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It has been widely recognized that there is a distinct need for preferred voltage ratings for aircraft direct-current electric apparatus which will be generally acceptable to manufacturers and users to serve as a basis for voltage standards for aircraft systems and equipment. Many difficulties and much confusion will be eliminated by adopting suitable standard voltage ratings for all aircraft electric equipment. These standard voltages should then be made a part of specifications and nameplates marked accordingly. Apparatus should be designed for satisfactory operation over the voltage ranges given in the table, but with performance not necessarily the same as guaranteed at rated voltage. Performance data and acceptance tests should be on the basis of standard voltages. It is recognized that special applications may require operation over other voltage ranges than those shown as standard.

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In conclusion, the application of alternating-current machines requires a working knowledge of the performance characteristics of the generator-regulator combination. Special emphasis should be placed on machine ratings, short-circuit, overvoltage, underspeed and fault power characteristics. Aid in understanding these characteristics is received by a study of synchronous machine analysis, but the detailed investigations performed by the cooperstive effort of the machine and regulator designers relieve the system designer of much of this work by providing characteristics in an immediately usable form.

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This standard defines the requirements for a single-axis laser gyro to be used as a sensor in an attitude control system, an angular displacement measuring system, an angular rate measuring system. This includes the electronics necessary to operate the gyro and to condition the output signal.

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Annotation An international biennial event to provide a platform to scientific and engineering community to remain abreast of the recent developments in high performance aerospace, communications, structures and materials.

Aerospace engineering