Full-order sliding mode control of uncertain chaos in a permanent magnet synchronous motor based on a fuzzy extended state observer*
Chen Qianga), Nan Yu-Ronga), Zheng Heng-Huoa), Ren Xue-Meib)
       
Comparison of observation errors between C1 and C2. (a) e 1, (b) e 2, (c) e 3.