对于浇注炉液位控制系统，论文根据液位控制的无自衡特性，提出浇注炉液位控制的智能PID算法。

For pouring furnace iron level control system, this thesis presents intelligent PID control algorithm according to the non-equilibrium characteristic of object.

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针对一类具有自衡特性的SISO系统，借助其开环阶跃输入稳态响应所提供的信息设计了一个新颖的PD型模糊控制器。

As for the SISO system with self-balance, a new PD fuzzy controller based on the steady response of its open loop step input is introduced.

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通过分析汽车衡秤台的结构特性和受载状况，建立汽车衡秤台的三维实体模型。

According to the analysis of the structure and the loading status of the vehicle scale, the 3-d solid model of the vehicle scale is built.

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