طرح بهینه پرتابگر الکترومغناطیسی القایی کویلی چندمرحله ای با ساختار نوین نامتقارن

حق مرام, رضا; قاسمی نژاد, مرتضی

طرح بهینه پرتابگر الکترومغناطیسی القایی کویلی چندمرحله ای با ساختار نوین نامتقارن

نوع مقاله : مقاله پژوهشی

نویسندگان

¹ جامع امام حسین (ع)

² دانشگاه شاهد

چکیده

پرتابگرهای الکترومغناطیسی القایی کویلی چندمرحلهای علی‌رغم پیچیدگی خاص، امروزه بهدلیل توانایی در شتابدادن اجسام سنگین بیشتر مورد توجه قرار گرفتهاند. سیمپیچها در پرتابگرهای الکترومغناطیسی القایی کویلی چندمرحلهای توسط مدار راهانداز مرتباً تغذیه میشوند تا جریانهای بهوجود آمده بتوانند نیروهای الکترومغناطیسی برای شتابدادن پرتابه ایجاد کنند. در ساختار متقارن، طول سیمپیچ‌ها باهم برابر است درحالی‌که در ساختار نوین نامتقارن، طول سیمپیچ‌ها باهم متفاوت بوده و به‌تدریج کاهش می‌یابد. در این مقاله، پرتابگر الکترومغناطیسی القایی کویلی چندمرحلهای با ساختار نامتقارن، معرفی شده است. طول و تعداد دور سیمپیچها و زمانهای کلیدزنی مختلفی انتخاب شده است تا تحریک سیمپیچها بهترین نتایج را ارائه دهد. شبیهسازی الکترومغناطیسی این پرتابگر با استفاده از روش اجزا محدود در حالت گذرا انجام گرفته است. سه مدل با ساختار متقارن و ساختار نامتقارن باهم مقایسه شده‌اند. نتایج نشان میدهد که ساختار نامتقارن عملکرد بهتری دارد و دارای سرعت حداکثری به‌طور متوسط به میزان 57/6% بیشتر از ساختار متقارن می‌باشد. همچنین بهترین مدل برای دستیابی به بیشترین سرعت پرتابه شناسایی شده است که به اندازه 52/11% سرعت پرتابه بیشتر و به ‌اندازه 62% طول پرتابگر کمتر دارد.

کلیدواژه‌ها

20.1001.1.26455153.1394.3.4.1.2

عنوان مقاله [English]

The Optimized Design of Multistage Induction Coilgun with a Novel Asymmetric Structure

چکیده [English]

Nowdays, multistage induction coilguns, despite their special complexity, have increasingly attracted attention
due to their ability to accelerate large-to-massive projectiles. Coils in a multistage induction coilgun are
energized sequentially to provide currents that create forces to accelerate the projectile. In symmetric structure,
the length of coils is equal but in the asymmetric structure, the length of coils is different and decreases
gradually. An asymmetric multistage coilgun with asymmetric structure is proposed in this paper. Different
lengths, number of turns, and switching times are chosen for each individual coil to get better results. The time
stepping finite-element method is utilized to obtain the simulation results. Three asymmetric models have been
compared with three symmetric models. The results show that the asymmetric structure has a better performance
and has 6.57% higher output maximum speed than the symmetric structure on the average. In addition, the best
model for obtaining the maximum projectile speed has been derived. Furthermore, this model has 11.52% higher
output speed and 62% lower length than the other models.

کلیدواژه‌ها [English]

Local Based Positioning System
Current Compression Generators
LORAN Transmitter
analytic design‌in‌g

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