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针对持久机加热炉这个双输入-双输出系统，用差分方程对其系统进行描述；用伪随机码激发系统，通过相关分析方法求出系统的脉冲响应，用最小二乘法拟合差分方程，估计出方程中的系数矩阵，并且建立了状态方程；用动态规则方法设计最佳反馈控制；根据卡尔曼滤波理论设计滤波器，对状态进行滤波和预报，同时给出了该实时控温系统的硬件结构图．在线运行结果表明，该系统升温过程快，控温精度高．
For the dual-input-dual output system of the persistence furnace, the differential equation is used to describe the system. The pseudo-random code is used to excite the system and the impulse response of the system is obtained by the correlation analysis method. The least squares method is used to fit the difference equation. The equation matrix is established and the equation of state is established. The optimal feedback control is designed by the dynamic rule method. The filter is designed according to the Kalman filter theory to filter and predict the state. At the same time, the hardware of the real-time temperature control system Structure chart. The result of online operation shows that the temperature rising process of the system is fast and the temperature control precision is high.