Research output per year
Research output per year
Wenqi Lu, Zhenyi Zhang, Dong Wang, Kaiyuan Lu, Di Wu, Kehui Ji, Liang Guo
Research output: Contribution to journal › Journal article › Research › peer-review
Effective identification of the load torque is one of the key aspects in improving the performance of servo drive systems against load disturbances. Sliding mode variable structure control has become a popular method in the development of a load torque identification (LTID) algorithm due to its parameter insensitivity and easy realization features. However, existing LTID sliding mode observers (SMO) with conventional structure have the disadvantages of high-frequency chattering and poor estimation accuracy, which limit its application in high-performance servo systems. In this paper, the mathematical model of the conventional LTID-SMO is deduced and analyzed. A new LTID-SMO is proposed by replacing the sign function with a saturation function and an additional feedback loop in the load torque observer. The effectiveness of the proposed observer is verified by various experiments. The results show that compared to conventional load torque observer, the proposed observer can identify the load torque with higher accuracy and faster response in different operational conditions.
Original language | English |
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Article number | 8534417 |
Journal | IEEE Transactions on Power Electronics |
Volume | 34 |
Issue number | 8 |
Pages (from-to) | 7852-7862 |
Number of pages | 11 |
ISSN | 0885-8993 |
DOIs | |
Publication status | Published - 2019 |
Research output: Contribution to journal › Comment/debate › Research › peer-review