Optimal direct ascent to GEO using laser propulsion system

• Main Authors: Chi-Yi Chang, 張吉毅
• Other Authors: Zuu-Chang Hong
• Format: Others
• Language: zh-TW
• Published: 1994
• Online Access: http://ndltd.ncl.edu.tw/handle/47327631886770076419

碩士 === 國立中央大學 === 機械工程研究所 === 82 === The optimal trajectory for direct ascent to the geosynchronous earth orbit (GEO) with prescribed longitudinal displacement will be solved by using parameter optimization method. The time derivative of the velocity mangitude of the vehicle is assumed to be a polynomial function of the flight time, with the coefficients as free parameters to be selected. The required thrust magnitude and angle are then derived as functions of the state variables and the polynomial. For the thrust acceleration and dynamic pressure constrained, we can fined seven trajectories. Finally there are three equally located launching stations along the Earth's equator.