Abstract:For the influence of nonlinear backlash and friction on positioning precision of the A-axis in 5-axis machine tools, the fuzzy controller (FC) with gain auto-tuning and fuzzy sliding mode controller (FSMC) with gains auto-tuning are proposed. For the former, the control law mutation caused by gain switching in traditional fuzzy control is eliminated by introducing the gain auto-tuning based on the continuous exponential function of the error. For the latter, chattering phenomenon in traditional SMC is eliminat… Show more
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