导航

ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 2016, Vol. 37 ›› Issue (9): 2799-2808.doi: 10.7527/S1000-6893.2015.0349

• Electronics and Control • Previous Articles     Next Articles

Adaline network-based identification method of inertial parameters for space uncooperative targets

SUN Jun1,2, ZHANG Shijie1, MA Ye3, CHU Zhongyi3   

  1. 1. School of Astronautics, Harbin Institute of Technology, Harbin 150001, China;
    2. Shanghai Key Laboratory of Space Intelligent Control Technology, Shanghai Institude of Spaceflight Control Technology, Shanghai 201109, China;
    3. School of Instrument Science and Opto-electronics Engineering, Beihang University, Beijing 100083, China
  • Received:2015-09-07 Revised:2015-09-30 Online:2016-09-15 Published:2016-01-06
  • Supported by:

    National Natural Science Foundation of China (51375034,61327809); Shanghai Aerospace Science and Technology Innovation Fundation (SAST2015-075)

Abstract:

During the operation in space, the spacecraft's attitude and trajectory are often affected by capturing the uncooperative target. In order to overcome the influence of uncooperative target on the dynamics and kinematics of spacecraft and ensure the high-precision attitude control strategy to be made and normal in-orbit condition, a process of identifying the inertial parameters of uncooperative targets should be accommodated. In order to avoid a large amount of computation induced by generalized inverse operation of traditional method in the identification process, which also causes severe vibration and unstability to numerical results, an Adaline neural network identification method based on normalized least mean square(NLMS) criterion is adopted. First of all, a system model composed of spacecraft, manipulator and uncooperative target is established based on the theory of momentum conservation. Then the weight parameters of the neural network representing the inertial parameters of uncooperative target are trained by the coefficient matrix of the identification equation as the input and output of the neural network via algorithm of NLMS with variable iterative step, and a fast and accurate process of identification is achieved. Finally, an ADAMS/MATLAB co-simulation platform is established, on which the proposed identification method is verified. The simulation results show that the Adaline neural network based on NLMS criterion is a fast and accurate method for identifying the target's inertia parameters.

Key words: spacecraft, uncooperative target, inertial parameter, neural network, identification

CLC Number: