طراحی، ساخت و تست تجربی ژیروسکوپ ارتعاشی استوانه‌ای

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشکده مهندسی صنایع، دانشگاه علم و فناوری مازندران

2 دانشکده مهندسی هوافضا، دانشگاه تربیت مدرس

3 دانشکده الکترونیک، دانشگاه شاهد

4 دانشکده مهندسی مکانیک - دانشگاه علم و صنعت ایران

چکیده

ژیروسکوپ ارتعاشی مدور با رزوناتور استوانه­ای بر مبنای اثر کوریولیس طراحی و ساخته شده است. تحریک و دریافت پاسخ نوسانات به کمک پیزوالکتریک­ها انجام شده است. پس از راه­اندازی رزوناتور، جدایش فرکانسی اندازه­گیری شده و همچنین الگوی ارتعاشی رزوناتور با بهره­گیری از یک مکانیزم صوتی ثبت و به کمک آن شیفت فازی رزوناتور ثبت شده است. نتایج آزمون­ها نشان داد که طراحی رزوناتور با ضخامت پله­ای، سبب دستیابی به نسبت مناسبی برای دامنه پاسخ به تحریک شده است. همچنین جدایش فرکانسی رزوناتور تقریبا یک هرتزی بوده است. به علاوه استفاده از مکانیزم صوتی کارایی مناسبی را در ثبت موقعیت الگوی ارتعاشی نشان داد و اندازه­گیری شیفت فازی به کمک مکانیزم صوتی وجود شیفت فازی 4 درجه­ای را نشان داده است. تاثیر نرخ دوران رزوناتور بر جاماندگی موج ارتعاشی بررسی شد و ثبت تغییرات نرخ دوران در چرخش ساعتگرد و پادساعتگرد در ژیروسکوپ، تقریب خطی مناسبی را به همراه داشته است.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Design, Manufacturing and Testing of a Cylindrical Vibrating Gyroscope

نویسندگان [English]

  • Seyed Mahmoud Ghalehbandi 1
  • Saleh Fallah 2
  • Iman Halimi 3
  • Hamid Shafiee Alavije 4
1 Faculty of Industrial Engineering, University of Science and Technology of Mazandaran, Behshahr, Iran.
2 Faculty of Aerospace Engineering, Tarbiat Modares University, Tehran, Iran.
3 Faculty of Electronic Engineering, Shahed University, Tehran, Iran.
4 Faculty of Mechatronic Engineering, Iran University of Science and Technology, Tehran, Iran.
چکیده [English]

A resonating gyroscope with a cylindrical resonator is designed using finite element method with the aim of achieving the maximum oscillation amplitude. The gyroscope is manufactured with a resonator made of maraging steel and piezoelectric forcers and pick-offs. In order to investigate the effects of material and manufacturing method defects in the resonator frequency split and phase shift of the resonator are measured at the desired excitation frequency and mode shape. By measuring natural frequencies of two main axes in the desired mode shape, the frequency split of the resonator is measured and the factors affecting the accuracy of measurement have also been investigated experimentally. Also, the vibration pattern of the resonator has been recorded using an acoustic wave mechanism and the phase shift of the resonator has been measured. Measurement of frequency split showed that the resonator experiences a frequency split of about 1 Hz. In addition, the use of the acoustic wave mechanism showed a good efficiency in recording the position and shape of the vibration pattern. Measurement of the phase shift with the help of the acoustic mechanism has shown the presence of a 4-degrees phase shift. Finally, in order to prove the gyroscopic phenomenon, the effect of the resonator rotation rate on the vibration wave persistence was investigated and it has shown a suitable linear approximation.

کلیدواژه‌ها [English]

  • Gyroscope
  • resonator
  • phase shift
  • frequency split
  • coriolis effect

مراجع

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