Adaptive Fuzzy Control Research of CVT Electro Hydraulic Position Servo System

In order to improve antijamming to external interference and adaptive capacity under various operating conditions, this paper has designed adaptive fuzzy control system of the CVT. It has identified e and e¿ membership function and its assignment table, and also determined the k₁ and k₂´s. It has established the k₁ and the k₂ manipulative rule and calculated its polling list by fuzzy adaptive control algorithm, then simulated this control system through MATLAB. The simulation process is in the case of estimating e and e¿ value to manually input the k₁ and the k₂ value, then the characteristic curve was exported and controlled by the MATLAB. It has contraposed the different e and e¿ to input corresponding k₁ and k₂, then Obtained multiple sets of characteristic curves, which contribute analysis of this control system´s performance. From the experiment curve, we can find that the Electro-hydraulic position servo system has the characteristics of strong adaptive ability, good stability, short peak time and strong Robustness.