Compared with the reality, it is useful valuable and more precise to compute a last subsidence by building a math model.
通过建立数学模型进行最终沉降量计算，并与实际观测值相比较，具有较高的精度和使用价值。
Aiming at the nonlinear object of boiler with instability parameter and difficult building math model, using traditional PID controller can't reach the best effect.
针对锅炉这种具有非线性、参数不稳定、难以建立精确数学模型的控制对象，采用传统的PID控制，效果不佳。
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