フクシマ エドワルド フミヒコ
所属 工学部 機械工学科 職種 教授
|標題||Estimation of sensor faults and unknown disturbance in current measurement circuits for PMSM drive system|
|著者・共著者||Gang Huang, Edwardo F. Fukushima, Jinhua She, Changfan Zhang, Jing He|
|概要||Current sensor faults leads to system degradation of a permanent magnet synchronous motor (PMSM)
drive. Accurate estimation of the faults for fault-tolerant control has become an important issue.
However, unknown disturbance in measurement circuits greatly aggravates the difficulty of the estimation
and seriously influences the performance of the estimation. This paper presents a new estimation
method of sensor faults and unknown disturbance in current measurement circuits for an interior
PMSM drive system. The system model, which contains faults of virtual sensors for ab axis currents
and the unknown disturbance, is first constructed. Then, the model is transformed into a model with
actuator faults by a first-order low-pass filter. Moreover, the faults and disturbance in the model are
decoupled by coordinate transformation. And sliding-mode observers are designed based on the new
decoupled system. Single and simultaneous faults of current sensors and an unknown disturbance are
accurately estimated based on sliding-mode equivalent control methodology. An experiment is carried
out to demonstrate the validity and effectiveness of the method.