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The observability analysis is presented and a combining method applying extended Kalman filter (EKF) and high frequency injection (HFI) method is proposed to realize the estimation of rotor speed and position at standstill and in normal situation for permanent magnet synchronous machine (PMSM). Considering the observability of start-up situation, a surface-mounted permanent magnet synchronous machine...
Based on the physical dynamic properties model of the intake system (from the state equation and measurement equation) and the intake system model and the statistical properties assumption of sensor noise, the measured data was mapped to the state space. Then using the state predictor, through the EKF (Extended Kalman Filter) , preprocessing the data from the intake manifold absolute pressure sensor,...
Dual EKF which is suitable for simultaneously on-line estimating states and parameters of nonlinear systems is applied to the rotor resistance and rotor flux on-line simultaneous estimation problem of vector control system of induction machines. Based on dual EKF, a self-tuning vector control system with higher performances is established. Simulation results show that the proposed scheme is effective...
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