【正文】 im Integarted Porduets, 2009: 116.[27] 陳增輝, 劉西玲. 使用MAX7219時(shí)應(yīng)注意的幾個(gè)問(wèn)題[J]. 國(guó)外電子元器件, 2011, (11): 22~24.[28] 王昌華. 固態(tài)繼電器及其應(yīng)用[J]. 西北電力技術(shù), 2004, (5): 4952.[29] 米倫. 固態(tài)繼電器在加熱器中的應(yīng)用設(shè)計(jì)[J]. 低壓電器, 2012, (10): 4850.63致　謝本論文是在黃景濤老師悉心指導(dǎo)下完成的，從論文選題到課題難點(diǎn)的解決，黃老師都給予了本人悉心地指導(dǎo)。在完成論文期間，黃老師盡力為我們提供畢業(yè)設(shè)計(jì)所需要的學(xué)習(xí)資料，并犧牲自己的休息時(shí)間，幫助我們解決設(shè)計(jì)中所遇到的難題。黃老師的敏銳的洞察力、淵博的知識(shí)、高度的責(zé)任感令我深受裨益。在黃老師身上我不僅學(xué)到了正確的科研方法及豐富的知識(shí)，也學(xué)會(huì)了做人的道理。在此特向黃老師表示誠(chéng)摯的感謝！在課題完成過(guò)程中，還得到了我的同學(xué)的指導(dǎo)和幫助，同學(xué)給我提供了很多思路與經(jīng)驗(yàn)，對(duì)我深入理解課題的有關(guān)知識(shí)與方法起到了重要作用。在此，我對(duì)幫助過(guò)我的同學(xué)也表示深深的謝意。英文資料翻譯英文資料原文The Gas Water Heater Control System DesignBased on Fuzzy ControlAbstractThe gas water heater is a controlled object with timedelay and nonlinear characteristics. So it is difficult to establish its accurate mathematical model. Because the conventional PID regulator has fixed parameters, the control effects are often this paper,the device uses a microcontroller ATMegal16L and fuzzy control technology. The DIDO fuzzy controller is deposed two DISO fuzzy controller, using selftuning PID temperature control algorithm in order to meet the needs of the characteristics of the gas water heater. The simulation results show that the bination of fuzzy control and PID control can effectively reduce the overshoot and steady state error as well as it can shorten adjusting time.KeywordsThe gas water heate, Temperature control, Selftuning Fuzzy PIDI. INTRODUCTIONAs the living conditions improve, people attach more importance to fort and convenience, thus, the temperature control of gas water heaters made strict requirements. Currently, most of the gas water heaters using the manual gas valve and the water valve to control water temperature, when the influent water temperature and flow changes, also effluent water temperature changes. Part of the gas water heater using putercontrolled, by the conventional feedback control, the constant temperature control effect is unsatisfactory. So, this paper proposes a temperature control system based on fuzzy control. Fuzzy control has the advantages of flexibility and adaptability, it is better in solving the gas water temperature control requirements.II. THE COMPOSITION OF THE GAS WATER TEMPERATURECONTROL SYSTEMThe core of the temperature control system is ATMegal16L microcontroller, including the influent water temperature detection circuit, the effluent water temperature detection circuit, the water flow detection circuit, the water valve conditioned circuit, the gas valve conditioned circuit, the fan control circuit, the firing circuit and the safety valve conditioned circuit. System structure is shown in Figure 1. When system starts working, set the effluent water temperature from the keyboard, the temperature signals are measured by the temperature sensor and processed by MCU, then the system obtained the deviation, Fuzzy controller outputs the signals to control the influent water valve and the gas valve, the effluent water temperature remains constant.Figure 1. Membership function curveThe input signal of controller is the gas water heater actual effluent water temperature Tw, the output signals of controller are the gas valve controlled variable Gv and the influent water valve controlled variable Wv. In order to achieve fuzzy control, DIDO fuzzy controller is deposed into two DISO fuzzy controllers, they are fuzzy controller I and fuzzy controller II. Fuzzy controller is shown in Figure 2. The controller calculates deviation e (e= TsTw) and deviation change rate ec of the effluent water temperature Tw between the set temperature Ts. Input variable of fuzzy controller is e and ec, output variable of fuzzy controller is Gv and Wv, the control algorithm using fuzzy parameters selftuning PID. Fuzzy controller adjusts Gv and Wv, make the effluent water temperature constant. [1]Figure 2. Membership function curveFuzzy controller scheduling rules are as follows:Rule 1: When |E|, |EC| is large, if E0 amp。 EC0, then activate the fuzzy controllerv I 。 if E 0 amp。 EC 0, then activate the fuzzy controller II.Rule 2: When |E| large and | EC | is small or 0, if E0 amp。 EC0, then activate the fuzzy controller I 。 if E0 amp。 EC0, then activate the fuzzy controller II .Rule 3: When |E| is small, if the EC0, then activate the fuzzy controller I。 if EC0, then activate the fuzzy controller II.III. SYSTEM CONTROL ALGORITHMFuzzy control is based of a dynamic way of thinking people. The operator39。s operational experience is generalized into a series of conditional statements, and using puter to achieve process control. It has not dependent mathematicalmodel of the object, has a good dynamic response, small overshoot and strong robustness advantages.A. Structural Design of fuzzy controllerFuzzy PID controller is a conventional PID regulator based on fuzzy set theory, according to the control error and the error rate of change online automatic adjust the ratio coefficient, integral coefficient and differential coefficient.Because of the same structure as the two fuzzy controllers, we only discuss the design of fuzzy controller I. The structure of fuzzy controller is shown in Figure 3. It consists of a direct controller and an indirect controller. Direct controller uses the conventional PID controller, indirect controller uses fuzzyreasoning. Fuzzy controller makes up of two inputs and three outputs. Input variable is e and ec. Output variable is the PID regulator parameters △KP、△KI、△KD. In the process of operation, through the e and ec judgment, the fuzzy reasoning make evaluation PID controller, According to the control effect, online modifies KP, KI and KD, make the PID controller to achieve the best effect of control. According to the fuzzy reasoning results PID controller, through the PID arithmetic output control, control Gv, then control the effluent water temperature. [2]Figure 3. Schematic diagram of Fuzzy Controller IB. Design of FuzzyThe e and ec defined on the fuzzy set theory field: E、EC={3,2,1,0,1,2,3}. E,EC= {N