Journal of Space Science and Technology

Journal of Space Science and Technology

Camera Cabling Analysis of a Remote Sensing Satellite in Terms of Electromagnetic Compatibility

Document Type : Original Research Paper

Authors
1 Instructor, Satellite Research Institute, Iranian Space Research Center, Tehran, Iran
2 MS.c, Pooyeshgaran Sanat HAGH, Tehran, Iran
3 BS.c, ,Satellite Research Institute, Iranian Space Research Center, Tehran, Iran
4 Assistant Professor, Satellite Research Institute, Iranian Space Research Center, Tehran, Iran
Abstract
Ensuring the correct operation of electrical equipment in tandem is a critical engineering concern, particularly when addressing the issue of electromagnetic compatibility (EMC). In satellite systems, EMC considerations must be addressed from the initial design phases, as methods such as shielding or the addition of suitable filters are not always feasible or optimal. This article examines the necessity of shielding the LVDS (Low-Voltage Differential Signaling) bus cabling of the satellite's camera, which is located on the satellite's exterior. The study begins with the simulation of the LVDS bus cabling to assess the need for shielding, and the results are subsequently validated through electromagnetic compatibility testing. The research findings indicate that, while shielding the LVDS bus cable of the camera can improve protection by a factor of ten thousand in the worst-case scenario during Radiated Emission (RE) and Radiated Susceptibility (RS) tests, the low level of interference radiation in RE (approximately E7–8 V/m or E4/1–11 A/m) and the small amplitude of the interference signal in RS (approximately 0.001 V) suggest that shielding is not necessary. Shielding would only increase the satellite's mass and complicate the connection without significant benefits. It is evident from this study that simulating Conducted Emission (CE) and Conducted Susceptibility (CS) tests in subsequent design phases is essential to ensure comprehensive EMC assessment.
Keywords
Subjects

Article Title Persian

تحلیل کابل‌بندی دوربین یک ماهواره سنجشی از منظر سازگاری الکترومغناطیسی

Authors Persian

راضیه نریمانی 1
محمد کرمی 2
لیلا فرهودی 3
الهام حسینی 4
محمد سینجلی 4
ولی طالب زاده 1
1 مربی، پژوهشکده سامانه های ماهواره، پژوهشگاه فضایی ایران، تهران، ایران
2 کارشناسی ارشد، شرکت پویشگران صنعت حق، تهران، ایران
3 کارشناسی، پژوهشکده سامانه‌های ماهواره، پژوهشگاه فضایی ایران، تهران، ایران
4 استادیار، پژوهشکده سامانه‌های ماهواره، پژوهشگاه فضایی ایران، تهران، ایران
Abstract Persian

کارکرد صحیح تجهیزات الکتریکی در کنار یکدیگر، دغدغه جدی مهندسی به‌‌شمار رفته و موجب توجه ویژه به مبحث سازگاری الکترومغناطیس شده است. در ماهواره به عنوان یک سیستم پیچیده با وجود محدودیت‌های جرمی و ابعادی، از فازهای ابتدایی می‌بایست مسایل سازگاری الکترومغناطیسی مورد بررسی قرار گیرد؛ زیرا روش‌هایی مانند حفاظ‌سازی یا اضافه‌کردن فیلترهای مناسب همواره عملیاتی و بهینه نیست. در این مقاله، در گام نخست طراحی یک ماهواره سنجشی، کابل‌بندی باس LVDS دوربین که روی وجه بیرونی ماهواره است، با هدف بررسی ضرورت حفاظ‌کردن این کابل‌ها شبیه‌سازی و با نتایج آزمون سازگاری الکترومغناطیسی صحه‌گذاری شده است. بر اساس پژوهش انجام شده، با وجود این که در آزمون‌های تشعشع انتشاری (RE) و حساسیت‌پذیری تشعشعی(RS) حفاظ نمودن کابل باس LVDS دوربین که خارج از قفس فارادی ماهواره قرار دارد، حفاظت را در بدترین حالت ده هزار برابر بهبهود می‌‎بخشد، اما نظر به ضعیف بودن سیگنال مزاحم تشعشعی در RE (حدود V/m 8-E 7 یا A/m 11-E4/1) و همچنین کم بودن دامنه سیگنال مزاحم تزویجی در RS (حدود V001/0) ضرورتی نداشته وتنها هزینه جرمی ماهواره و پیچیدگی اتصال را افزایش خواهد داد. البته ضرورت شبیه‌سازی آزمون‌های CE و CS و مقایسه آن با نتایج عملی در گام‌های بعدی واضح است.

Keywords Persian

سازگاری الکترومغناطیسی
ماهواره سنجشی
باس LVDS
حفاظ‌سازی
RE
RS
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Volume 17, Issue 3
2024
Pages 61-70

  • Receive Date 04 March 2024
  • Revise Date 08 May 2024
  • Accept Date 26 May 2024
  • First Publish Date 27 May 2024