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ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 2019, Vol. 40 ›› Issue (8): 322992-322992.doi: 10.7527/S1000-6893.2019.22992

• Electronics and Electrical Engineering and Control • Previous Articles     Next Articles

State/parameter joint estimation for flexible hypersonic glide vehicles

CHEN Erkang, JING Wuxing, GAO Changsheng   

  1. College of Astronautics, Harbin Institute of Technology, Harbin 150001, China
  • Received:2019-03-11 Revised:2019-04-08 Online:2019-08-15 Published:2019-05-10

Abstract: It is essentially to jointly estimate the state and parameter of flexible hypersonic vehicles due to its nonlinearity, uncertainty, and rigid/elastic coupling. To solve these problems, a sensor placement strategy and a Moving Horizon Estimation with arrival cost updated by QR decomposition (MHE-QR) are proposed. First, the influence of sensor placement on observability is analyzed, based on which a performance index is proposed. Using this performance index, the sensor placement problem is transformed into a constrained optimization problem. The sensor placement scheme is obtained by solving this optimization problem. Utilizing the dynamic programming principle, the MHE-QR algorithm transforms the arrival cost update problem into a least square problem that is solved by QR decomposition in the framework of MHE. The Monte Carlo simulation results demonstrate that the sensor placement strategy and the MHE-QR algorithm can effectively improve the estimation accuracy, convergence speed, and computation rate. Additionally, the CPU time validate the real-time applicability of MHE-QR.

Key words: flexibility, hypersonic glide vehicle, sensor placement, state estimation, parameter estimation, moving horizon estimation

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