结合遗传算法和优化Q-Law算法的小推力轨道转移

Transactions of Nanjing University of Aeronautics & Astronautics

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结合遗传算法和优化Q-Law算法的小推力轨道转移

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Abstract:

A new orbit transfer method is presented by combining the genetic algorit h m (GA) with the refined Qlaw method. Considering the energy consumptio n , the relative thrust efficiency is introduced as a threshold deciding whether t o thrust or coast. GA is used to achieve the global timeoptimal orbit trans f er. The trajectory optimization problem is transformed into the constraint para met er optimization problem, thus the nonlinear twopoint boundary value problem is avoided. The refined Qlaw method integrated with the fuzzy logic control is adopte d for t he end course, the vibration is avoided and the high precision is achieved. The numerical simulation of satellite orbit transfer is implemented. Result s show that the new method can achieve the timeoptimal orbit transfer and t he low energy consumption, thus improving the transfer precision.

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Supported by the Key Project of Natural Scienc e Foundation of Jiangsu Province(BK2010072).

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