هدف از این مقاله، ارائه مدل تخمین هزینهی سامانههای پیشرانش فضایی سرمازا/نیمهسرمازا میباشد. در این راستا، انتخاب سامانه پیشرانش بهینه (از منظر نوع سوخت و اکسیدکننده) با هدف افزایش کارآیی و کاهش هزینه صورت پذیرفته است. سپس، نمونههای زوج سوخت و اکسیدکننده سامانه پیشرانش بر مبنای مشخصات جرمی – انرژتیک (وزن موتور – ضربه ویژه) سامانهی پیشرانش و همچنین نوع سیکل کاری موتور با نگاه به امکانپذیری ماموریت، تعیین میشود. برای این منظور، روندنمایی برای اجرا و استفاده از مدل تخمین هزینهی پیشنهادی تدوین شده است. در این روندنما، از روابط ریاضی موجود مدل تخمین هزینه استخراج میشود و با استفاده از مدلهای موجود مورد صحهگذاری قرار میگیرد. در نهایت خروجی این روندنما، نمودار هزینه- کارآیی (ضربه ویژه) برای هفت زوج سوخت و اکسیدکننده، انتخاب موتور براساس بیشینه ضربه ویژه، ایجاد فضای جستجوی طراحی برای بهینهسازی هزینه-زمان در پروژههای فضایی میباشد.
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