Model Free Adaptive Control for Industrial Engraving Machine System

Abstract

The engraving machine system is a typical multi-axis motion system, which has great application value in industrial production. The mechanism of input angular velocity and output position of a typical engraving machine system in speed control mode is analyzed. The engraving machine model is mainly composed of speed circuit, current circuit, motor and mechanical actuator. Some ideal assumptions and simplifications are made during the establishment of the mechanism model, which makes it difficult to estimate the parameters of the mechanism model accurately. The imprecise prediction model limits the application of model-based control algorithms and reduces the model control accuracy. Therefore, a model free adaptive control algorithm based on dynamic linearization of compact format is used to control the output position of the engraving machine. The stability of the proposed model-free adaptive control algorithm is analyzed and proved. The numerical simulation and practical experiment verify superiority and practicability of the proposed control algorithm for nonlinear time-varying system and engraving machine system.