【正文】 cess, the slow response of the control action, is closely related parameters. In this paper, this type of industrial furnace temperature control system design and technological transformation of the status quo, put forward by the master control loop circuit and vice matched by the second design in the vice control loop disturbance, a disturbance in the main control loop design of Smith predictor Cascade control, you can get better control effect.1 structure of the system Experiments and experience show that the temperature control object can be approximated as a pure lag element and an integral part of the first order form. Y is selected discharge temperature and gas flow rate Q to form the cascade servo control of the puter, and supplemented by the technical design of the Smith predictor control system. Figure TC said thermostat, FC, said gas flow regulator. TC usually thermostat PID regulation law, the gas flow regulator PI regulation by law of FC, SC Smith predictor. Smith predictor controller as a model to the feedback control loop to pensate for the dynamic nature of the process, bringing the temperature ahead of the object reflects the delay time to the controller, to effectively solve the large inertia of the time lag and pray to reduce the system overshoot, speed up the adjustment process in the role of the system. When the temperature changes, control by the main regulator, the regulator output as Vice given value, and ultimately control the gas valve opening. The output of the master circuit control loop settings as amended, vice basis, the Deputy control loop output as a true vacancy acting on the charged object. Changes in gas flow in the event, Deputy control loop to control the timely opening of the valve position, gas flows quickly overe the change of the material temperature.Smith predictor in the cascade control system, the valve position and gas flow regulation in a timely manner, and have some adaptive ability to effectively solve the object equivalent delay time is very long question. The second major disturbance for the system disturbance, the main disturbance of the system included in the vice control loop, the regulation control loop through the Deputy role in the disturbance to the main control loop parameters to be adjusted before the greatly weakened the impact of disturbance. Vice control loop includes integrator, reducing the lag phase, thus improving the dynamic quality of the system. When the disturbance occurred in the Viceloop, the occurrence of such fluctuations in gas flow caused by temperature changes, due to the presence of Vicecontrol loop, the gas flow regulator to timely action, rapid elimination of the impact of the disturbance。 when the disturbance occurred in the vice control loop outside, such as materials, energy, transport temperature changes caused by the change, projected by the Smith predictor controller changes the measured value by the temperature regulator to change its output signal, by changing the gas flow control loop, deputy to overe the disturbance . The system effectively solve the long object is the equivalent problem of delay time. Cascade control technology and the introduction of Smith predictor control system to improve the regulation of quality control, enhanced antijamming capability of the system to overe the inertia due to associate the object, adjust the delay caused by a large problem of poor quality. In addition, by increasing the gas flow regulator FC proportional gain Kp, the system can get the equivalent time constant smaller value, thus increasing the response speed control loop, deputy to improve the system39。s operating frequency.Cascade control of the system shown in Figure 5. The figure, Qr is given the value of gas flow, D1, D2 is the temperature by puter digital controller digital controller and flow, the general master loop sampling period T and vice control loop sampling period T equal approach control. If you use the master loop sampling period T and vice control loop sampling time T is equal to control, in order to avoid the master control loop and vice mutual interference between circuits and resonance, should make the difference between T and T 3 times2 Conclusion In the industrial processes, materials, energy, time delay caused by transmission problems is the traditional PID controller, the control can not solved the problem. Conventional PID control system for the delay large, nonlinear strong, the plexity of the slow response to control signals thermal process, often can not obtain a satisfactory control effect. Furnace temperature control problem is a typical time lag. Smith predictive control technology and the gas flow cascade control applications in the system, play time detection system may cause changes in the controlled volume and controlled some of the factors, the object is equivalent to effectively overe the problem a long time, and has robust features and improved control system for the regulation of quality. The main disturbance of the system included in the vice control loop, the regulation control loop through the Deputy role in the disturbance to the main control loop parameters to be adjusted before the greatly weakened the impact of disturbance. This control method in heat, chemicals, machinery processing, metal smelting and other industries also have a wide range of uses and promotion of value.附錄B附錄B（中文譯文）Smith預(yù)估控制技術(shù)在爐溫控制系統(tǒng)中的應(yīng)用摘要：分析用煤氣作為燃料、同一煤氣總管道給多臺(tái)熱爐加熱引起爐溫變化的原因，傳統(tǒng)PID控制普遍存在的時(shí)間滯后問(wèn)題，介紹史密斯預(yù)估控制原理，介紹串級(jí)控制與史密斯預(yù)估控制相結(jié)合的自動(dòng)控制技術(shù)在爐溫控制系統(tǒng)的應(yīng)用及實(shí)現(xiàn)。關(guān)鍵詞：史密斯預(yù)估控制，串級(jí)控制，爐溫控制0 引言對(duì)于鍋爐溫度的控制，由于PID控制器結(jié)構(gòu)簡(jiǎn)單、實(shí)用、價(jià)格低，PID控制得到了廣泛的應(yīng)用，但PID控制參數(shù)整定麻煩，被控對(duì)象模型參數(shù)難以確定，外界干擾會(huì)使控制效果飄離最佳狀態(tài)。對(duì)于這種情況史密斯（Smith）控制算法在鍋爐溫度控制中的應(yīng)用，使得鍋爐溫度控制能夠達(dá)到一個(gè)穩(wěn)定的水平。史密斯(Smith)預(yù)估控制的特點(diǎn)是預(yù)先估計(jì)出過(guò)程在基本擾動(dòng)下的動(dòng)態(tài)特性，再由預(yù)估器進(jìn)行補(bǔ)償?shù)倪^(guò)程控制技術(shù)．它的基本思想是按過(guò)程特性設(shè)計(jì)出一種模型加人到反饋控制系統(tǒng)中，以補(bǔ)償過(guò)程的動(dòng)態(tài)特性，然后由預(yù)估器進(jìn)行補(bǔ)償，力圖使滯后了的被控量超前反映到控制器，使控制器提前動(dòng)作，從而明顯地減少超調(diào)量，加速調(diào)節(jié)過(guò)程．特別是對(duì)于那些被控對(duì)象具有不同程度的純滯后，而被控對(duì)象又不能及時(shí)反映系統(tǒng)所承受的擾動(dòng)的控制系統(tǒng)，史密斯(Smith)預(yù)估控制技術(shù)獲得了廣泛的運(yùn)用．煤氣流量的控制過(guò)程內(nèi)在機(jī)理復(fù)雜，對(duì)控