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采用模糊PID控制低压铸造液面压力各个阶段,实现理论输入与实际输出误差值最小化。分析了低压铸造各个阶段的压力变化曲线,设计了低压铸造液面压力控制的整体方案,给出了低压铸造压力控制的流程图。采用模糊PID控制系统,设计了低压铸造控制系统的硬件和软件。对模糊PID控制压力各个阶段跟踪效果进行仿真,并且与PD控制跟踪效果进行比较。结果表明,采用模糊PID控制压力理论输入与实际输出值误差较小,低压铸造的各个阶段压力波动幅度较低,采用PD控制压力理论输入与实际输出值误差较大,低压铸造的各个阶段压力波动幅度较大。采用PID控制铝合金减速器箱盖低压铸造输出压力,能够降低输出压力跟踪误差。
Fuzzy PID control low-pressure casting liquid pressure in all stages, to achieve the theoretical input and output error is minimized. The pressure curve of each stage of low pressure casting was analyzed. The overall scheme of pressure control of low pressure casting was designed. The flow chart of pressure control of low pressure casting was given. Using fuzzy PID control system, the hardware and software of low pressure casting control system are designed. The simulation results of the tracking effect of each phase of fuzzy PID control pressure are compared with the tracking results of PD control. The results show that the error between the pressure theory input and the actual output value using fuzzy PID control is small, and the pressure fluctuation in each stage of low-pressure casting is low. The error between PD input pressure and actual output value is large. Pressure fluctuation Larger. Using PID control aluminum alloy reducer lid low pressure casting output pressure, can reduce the output pressure tracking error.