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A Control Algorithm for Improving the Ratio Precision of Solventless Laminating

In order to reduce the influence of gear pump flow fluctuation on the mixing ratio precision of the solventless laminator mixing unit, this paper establishes a mathematical model of the instantaneous flow fluctuation of the gear pump, then the theoretical analysis and calculation are carried out. Based on the analysis of the relationship between the flow fluctuation of the gear pump and the angle change, a sinusoidal acceleration and deceleration speed compensation control algorithm is proposed. Through the use of optimization model with the smallest flow fluctuation, and the relevant parameters of the optimal compensation algorithm are determined by the least squares method. Finally, this paper establishes a gear pump flow analysis experimental platform and carry out a flow analysis experiment. Through the measurement and analysis of the sinusoidal acceleration and deceleration speed compensation control algorithm and the gear pump flow without applying the compensation algorithm, the results show that the proposed control algorithm can relative reduce the gear pump flow fluctuation by 62.6%, and the mixing ratio can be controlled within 5 %.