Effect of time-varying factors on the drift model of Electrostatically Supported Gyro
Time-varying factors are extremely important in both dual-axis servo turntable and Electrostatically Supported Gyro (ESG) by affecting the testing of ESG's drift model. In this paper, we model four time-varying factors, gyro case mis-alignment angle, installation error between gyro and inner ring platform, turntable base fluctuation, and null position drift of turntable's angle sensor, as a polynomial of time in the drift model for pole ESG. Based on the kinematic formula of turntable in pole gyro mode, we derive the relationships between the time-varying factors and angles of inner and outer rings of the turntable. Then the cases that these four time-varying factors affect the trajectory of turntable are analyzed term-by-term. We find that the constant drift, gravity-related drift and random drift are greatly affected by these four factors. In the light of these analyses, several basic principles to control these factors are further proposed.
Design of Gyroscope’s Case Rotation Device
In order to improve the precision of gyroscope,case rotation is usually applied to automatically compensate drift error torque relative to the case.The paper introduces a kind of Brushless DC-Servomotor’s numeric control system and makes comparison with Russian Д-15 analog control system.At the same time,a special conductive device is designed between moving module and immobile shell.The result of experiment shows that the conductive device has longevity of service and high reliability.
Comparative Industrial Sociology and the Convergence Hypothesis
Industrial sociology grew spectacularly after World War II, concentrating on three areas: workers' relations with each other, their managers, and their unions; the social organization of the factory; and the impact of technology on social systems extending from the factory to the society. Unable to sus­ tain leadership in all of these areas, industrial sociology shrivelled as other fields invaded its domains. Human relations became the ideological property of the business schools; labor economics maintained its grip on industrial relations; industry-community relations waned as interest in community power soared; industrial organizations were absorbed into the study of com­ plex organizations; occupational sociology maintained research impetus in labor force analysis; and the sociology of the economy dominated the study of industry's institutional relationships. Industrial sociology survived on remnants: worker-machine relationships (job satisfaction, alienation, un­ employment), organizational responses to technological changes. and a bit of working-class ethnology. Enduring interest in technology, however, en­ abled industrial sociology to take part in sociology's expanding interest in comparative studies.