基于DCS的水泥复合材料成型设备自动控制方法

Automatic Control Method of Cement Composite Molding Equipment Based on DCS

为了降低材料成型孔隙率,提高材料成型控制效果,研究基于DCS的水泥复合材料成型设备自动控制方法,提高成型设备自动控制性能。深入研究DCS自动控制原理,利用DCS控制系统计算水泥复合材料配料配比,根据计算结果,使用DCS控制系统中的双闭环比值控制系统实现成型设备的物料比值自动控制。与模糊PID控制方法相结合,从温度和速度两方面出发,通过PID参数调整,实现成型设备的温度与速度自动控制。实验结果表明:上述方法的抗脉冲干扰能力较强,具有较理想的成型设备自适应控制性能;不同成型压力下,所提方法制作的水泥复合材料的孔隙率始终保持最低,且在不同压应力下,其压阻特性具有极强的规律性,成型设备自动控制性能优势显著。

In order to reduce the material forming porosity and improve the control effect, this article presented a method of automatic control for cement composite forming equipment, and thus to improve the automatic control performance of the forming equipment. Firstly, the principle of DCS automatic control was lucubrated, and the DCS control system was used to calculate the mixture ratio of cement composites. According to the results, the dual closed-loop ratio control system in DCS control system was adopted to complete the automatic control for the material ratio of the forming equipment. Combined with the fuzzy PID control method, we adjusted PID parameter from two perspectives: temperature and speed, and thus to the automatic control for temperature and speed of equipment. Following conclusions can be drawn from experimental results: the proposed method has strong ability to suppress pulsed interference and ideal adaptive control performance.;under different molding pressures, the porosity of cement composites made by the method always keeps the lowest;under different compressive stresses, its piezoresistivity has strong regularity for the meanwhile, therefore, the automatic control performance of equipment has significant advantages.