Abstract
The present study introduces the problem of controlling the polymer extrusion (PE) machine by applying a fuzzy sliding mode control (FSMC) structure. The PE is an uncertain and perturbed common industrial process. The problems of the PE often arise from a maladjusted and unsteady feeding rate. For the proposed FSMC, the proportional–integral (PI) sliding surface is derived intuitively. The reaching control is implemented using the fuzzy inference system (FIS) to improve control robustness and avoid undesired chattering effect. Stability of proposed FSMC is studied using Lyapunov stability approach. The implementing of FSMC in real-time using a microcontroller kit is carried out. The experimental testing of the proposed FSMC for PE machine is performed. The comparative quantitative analysis of the proposed FSMC, the second order sliding mode control (SOSMC) and PID algorithms are presented. The system performance shows the effectiveness of the proposed FSMC.
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