结合遗传算法和优化Q-law算法的小推力轨道转移.pdfVIP

Dec.2010 Transactions of Nanjing University of Aeronautics . Astronautics Vo 1. 27 No. 4 LOW-THRUST ORBIT TRANSFER BY COMBINING GENETIC ALGORITHM WITH REFINED Q-LAW METHOD 1 Z 3 1 Cheng Yuehua • , Jiang Binl , Sun Jun •,, Zhang Xian , Hou Qian 1 (l. College of Automation Engineering. NUAA. 29 Yudao Street. Nanjing , 210016. P. R. China , 2. Academy of Frontier Scíence. NUAA. 29 Yudao Street. Nanjíng. 210016. P. R. China , 3.Shanghai Aerospace Control Engineeríng Institute , Shanghai , 200233. P. R. China , 4. Shanghai K哩y Laboratory of Space Intelligent Control Technology. Shanghai. 200233. P. R. China) Abstrad , A new orbit transfer method is presented by combining the genetic algorithm (GA) with the refined Q- law method. Considering the energy consumption , the relative thrust efficiency is introduced as a threshold decid- íng whether to thrust or coast. GA is used to achieve the global time精optimal orbít transfer. The trajectory opti- mization problem is transformed into the constraint parameter optimization problem. thus the nonlinear two-point boundary value problem is avoided. The refined Q-Iaw method integrated with the fuzzy logíc control is adopted for the end course , the vibration is avoíded and the high precision is achíeved. The numerical simulation of satel- lite orbit transfer is implemented. Results show that the new method can achieve the time咱ptimal orbit transfer and the low energy consumption , thus improvíng the transfer precision. Key words: orbit transfer ,genetic algorithm ,Q-Iaw method I low thrust CLC Dumber , V448.22+1 Doc:ument code:A Article 1D, 1005-112