Myong Song Ryu*
With the development of industrial automation technology, pneumatic position servo control systems are widely used using fast switching solenoid valves instead of expensive proportional valves or servo valves.
However, the fast switching solenoid valve has a bad effect on the position control characteristics due to its inherent nonlinear nature.
Therefore, it is necessary to use a suitable control method to compensate for the nonlinear behavior of the fast switching solenoid valve and to construct its accurate nonlinear mathematical model.
We constructed firstly an air, machine, electrical and electronic model of a fast switching solenoid valve using AMESim and, on this basis, propose a new nonlinear model of a fast switching solenoid valve controlling pneumatic servo position control system.
In addition, a Fuzzy-PID switching control system was designed by combining the advantages of PID control and fuzzy control. A control block was constructed using Matlab/Simulink control toolbox, and the dynamics of the system was simulated in conjunction with the above AMESim model to validate the method.
Since the absolute control error in Fuzzy-PID switching control method is less than 0.25 mm and the dynamic characteristics of the controller are good, the proposed model and Fuzzy-PID switching control method in this paper have significant effects on improving the Electro-pneumatic servo position control performance using fast switching solenoid valve and developing accurate pneumatic motion control.
Published Date: 2025-01-11; Received Date: 2024-09-20
