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To improve the precision of the filling pressure curve of differential pressure casting controlled with PID controller,the model of differential pressure casting process is established and two pressure-difference control systems using PID algorithm and Dahlin algorithm are separately designed in MATLAB. The scheduled pressure curves controlled with PID algorithm and Dahlin algorithm,respectively,are comparatively simulated in MATLAB. The simulated pressure curves obtained show that the control precision with Dahlin algorithm is higher than that with PID algorithm in the differential pressure casting process,and it was further verified by production practice.
To improve the precision of the filling pressure curve of differential pressure casting controlled with PID controller, the model of differential pressure casting process is established and two pressure-difference control systems using PID algorithm and Dahlin algorithm are compared designed in MATLAB. controlled with PID algorithm and Dahlin algorithm, respectively, are comparatively simulated in MATLAB. The simulated pressure curves obtained show that the control precision with Dahlin algorithm is higher than that with PID algorithm in the differential pressure casting process, and was was verified further production practice.