کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5472791 1520067 2017 21 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Trajectory optimization for a ramjet-powered vehicle in ascent phase via the Gauss pseudospectral method
ترجمه فارسی عنوان
بهینه سازی مسیر برای وسیله نقلیه موتوری در مرحله ی صعود از طریق روش گاوس سوسپترال
کلمات کلیدی
راننده وسایل نقلیه موتوری، فاز صعود، بهینه سازی مسیر، حداقل سوخت، حداقل زمان،
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی هوافضا
چکیده انگلیسی
To determine the optimal trajectory for the ascent phase of a general supersonic vehicle propelled by a hydrocarbon-fueled ramjet, a strategy is developed based on the coupling characteristics of a flight-propulsion system. With two different cost functions and a series of necessary constraints, minimum-fuel and minimum-time trajectory problems are formulated. Both problems are transformed into typical continuous Bolza problems, which can be solved via the Gauss pseudospectral method. The results show that along the two optimal trajectories, the vehicle accelerates horizontally at the onset of the ascent process until the dynamic pressure can provide sufficient lift. Efficiency analysis is conducted to reveal the coordination between engine performance and atmosphere characteristics. It is found that the take-off weight influences the optimized results. The difference between the two optimal trajectories narrows as the take-off weight increases.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Aerospace Science and Technology - Volume 67, August 2017, Pages 88-95
نویسندگان
, , , ,