期刊缩写       T JPN SOC AERONAUT S

期刊全称       TRANSACTIONS OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES 日本航空宇宙学会

出版国家       JAPAN

出版周期       Quarterly

出版年份       1959

出版社         Japan Society for Aeronautical

期刊ISSN       0549-3811

 

Classification: Aerodynamics; Aeronautics; Space sciences.

 

TRANSACTIONS OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES Vol. 57(2014) No. 3

 

Space Station Long-Duration Orbit Design using a Two-Level Optimization Approach

Guo-Jin TANG, Kun-Peng LIN, Ya-Zhong LUO

Released: April 24, 2014

 

Space station orbit design missions are characterized by a long-duration and multi-step decision process, which makes its optimization design very complicated. An integrated nonlinear programming (NLP) model is developed by considering the interaction effects of different flight segments of a space station. A two-level optimization approach is proposed to optimize the total propellant consumption while satisfying different constraints. The up-level problem employs the orbital altitudes of each flight segment as design variables, and adopts the simplex method to search for the optimal solutions; the low-level problem employs the maneuver impulses and times within each flight segment as design variables, and the objective function is calculated by combining approximate an analytical method and a shooting iteration method. The proposed approach is evaluated in two test cases of a six-month orbit mission and a nine-month orbit mission. The results show that the proposed approach can effectively optimize the space station long-duration orbit design problem, and can save considerable propellant by 60–70% compared with previously proposed space station orbital strategies.

 

 

A New Constellation Architecture for Practical Responsive Revisiting

 

Released: April 24, 2014

 

Responsive communications or Earth surveillance missions typically require frequent revisits to any point on the Earth's surface and employ a constellation with two satellites to improve coverage performance. As a new approach to constellation design, in this paper, a novel constellation is presented by fixing the interval between successive revisits at all latitudes. Analytic and numerical simulations are implemented to illustrate the existence of such a revisiting constellation in a large region parameterized by the relative values of right ascension of ascending node and argument of latitude. We also present a global investigation to address the existence region of the PTR constellation, associated with the relationship between the characteristic parameters and the orbital elements (for example, semi-major axis and inclination). In order to design the stationkeeping strategy for PTR constellation, a new concept of J2 invariant PTR constellation is introduced. Compared to a single-burn strategy tracking a specified PTR constellation, the improved strategy has a clear competitive advantage of reducing the control frequencies or costs down to one fifth.