Chin. Phys. B ›› 2013, Vol. 22 ›› Issue (3): 30505-030505.doi: 10.1088/1674-1056/22/3/030505
冷洪泽, 宋君强
Leng Hong-Ze (冷洪泽), Song Jun-Qiang (宋君强)
摘要: This work addresses the problem of estimating the states of nonlinear dynamic systems with sparse observations. We present a hybrid three-dimensional variation (3DVar) and particle piltering (PF) method, which combines the advantages of 3DVar and particle-based filters. By minimizing the cost function, this approach will produce a better proposal distribution of the state. Afterwards the stochastic resampling step in standard PF can be avoided through a deterministic scheme. The simulation results show that the performance of the new method is superior to the traditional ensemble Kalman filtering (EnKF) and the standard PF, especially in highly nonlinear systems.
中图分类号: (Nonlinear dynamics and chaos)