Compared with traditional counter gravity casting technique, the technique combining with appropriate gating system makes great contributions to the enhancement of mechanical property of castings.
相比传统的反重力铸造技术，该技术配合合适的浇注系统对铸件性能有明显的改善作用。
After the mathematics model of the control object of the counter-gravity casting process is analyzed, PID controller is designed, and the PID parameters are determined by MATLAB simulation.
在分析反重力铸造过程控制对象数学模型的基础上，设计了PID控制器，并采用临界稳定法结合MATLAB仿真确定了PID参数。
Secondly, the control project of counter-gravity casting is researched.
其次，对反重力铸造控制方案进行了研究。
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