【導(dǎo)讀】的研究非常重要。文章對中央空調(diào)系統(tǒng)中溫、濕度控制的相關(guān)問題從控制策略角度。作了比較詳細(xì)的分析。樓字自動化系統(tǒng)是智能建筑的一個重要組成部分。防、安全防范等進(jìn)行全面的計算機監(jiān)控管理。其中，中央空調(diào)的能耗占整個建筑。能耗的50％以上，是樓宇自動化系統(tǒng)節(jié)能的重點?？刂萍夹g(shù)，對于工況及環(huán)境變化的適應(yīng)性差，控制慣性較大，節(jié)能效果不理想。響及控制品質(zhì)不夠理想。而智能控制特別適用于對那些具有復(fù)雜性、不充全性、模。糊性、不確定性、不存在已知算法和變動性大的系統(tǒng)的控制?？照{(diào)機組內(nèi)有大功率的風(fēng)機，但它的能耗很大。能達(dá)到節(jié)約能源和降低運行費用的目的。定于空調(diào)系統(tǒng)的服務(wù)用途和衛(wèi)生要求。新風(fēng)的導(dǎo)入口一般設(shè)在周圍不受污染影響。臺為送風(fēng)機，另一臺為回風(fēng)機，則稱為雙風(fēng)機系統(tǒng)。以使室內(nèi)溫度維持于一定值。冷卻盤管的冷凍水由冷卻機提供，冷。行指示、記錄、打印，并監(jiān)測各機電設(shè)備的運行狀態(tài)及事故狀態(tài)、報警。報警并進(jìn)行事故處理。

　　

【正文】 ditioning system, diversification, operational management and control devices to bee plicated. Therefore require operators to be in strict accordance with the energyefficient design requirements, including technical measures to operate, and maintain, not free to change run Cheng Xu, and Zhong39。s Shebei Chaigai system. (3) temperature, humidity correlation Describe the state of the two main parameters of air temperature and humidity as they are not pletely independent of the two variables. When the relative humidity changes will cause humidification (or dehumidification) action, the results will lead to temperature fluctuations。 and temperature changes, so indoor air vapor saturation pressure, the absolute moisture content in the same situation, directly change the relative humidity (relative humidity to reduce the temperature increased, the temperature increase reduces relative humidity). Associated with the parameters such as relative parameters. Clearly, in the temperature and humidity of the airconditioning systems required to form the automatic control system should pay attention to this feature. Control Problems Recently, the central airconditioning system is the main control method used in PID control, the use of temperature measurement devices (temperature sensors) PID temperature controller Electric Twoway control valve of the PID regulator. Summer conditioning cooler on the cold water pipe electric control valve, hot water pipes in winter conditioning on the electric heater control valve, the control valve opening size for cold (hot) water regulation, to achieve temperature control. For the convenience of management, simplifying the control process, the temperature sensor located at the airconditioning units total return air duct, return air temperature and room temperature, because there were differences in the return air temperature control settings, in the summer should be higher than the required room temperature ( ~ ) ℃, in winter the temperature should be lower than the requirements ( ~ ) ℃. PID regulation of the essence of the deviation of the input in proportion, integral, differential relationship between the operations function, the results of its operations for the control output. Onsite monitoring stations to monitor the working status of the object air conditioning units are: filter obstruction (pressure difference), l when the filter blocking alarm, to see whether the filter needs to be replaced。 conditioning hot and cold water valve opening. To achieve the atmospheric temperature of purpose。 supply fan and return fan on / off。 conditioning fresh air, return air and exhaust valve opening, to change the fresh air, return air ratio, ensuring the health degree requirements decrease energy consumption, to save operating costs。 test fan and blower back pressure on both sides so that the fan working status。 detection of new wind, return air and supply air temperature, humidity, due to be transferred back to wind near the object to reflect the average state, so as to return air temperature and humidity for the control parameters. Set the air conditioning unit according to the work of the monitoring parameters and status data, field control station to send control back to the fan on /off, fresh air and return air ratio adjustment, coil cooling, hot water flow, to ensure air conditioning in the region both air temperature and humidity range in the set to meet the fort requirements, but also allow air conditioning units to run a lower energy consumption. PID regulator to meet the general areas of environmental ask for much, but the PID regulator also some disadvantages, such as easy control overshoot, the working conditions and poor adaptability to environmental change, control of large inertia, energy saving effect is not satisfactory, so the environment or the environment require a higher place with special requirements, PID regulator can not satisfy the request. Such as central air conditioning system for large, plex process (or object) of the control implementation, usually by some kind of guidelines, the lower its deposition into a number of subsystems to exercise control, coordination in the top performance among the various subsystems, making integration After the system is in some sense the optimal state. Problems in control mainly in: (1) uncertainty Traditional control is based on the mathematical model of control, namely that the control model of the object and the interference is known or can be obtained by identification. However, many plex systems in control of uncertainty, or even mutate. For the unknown, uncertain, or know little about the control problem is difficult to model using traditional methods, it is difficult to achieve effective control. (2) highly nonlinear l Traditional control theory, for the control of highly nonlinear object, although there are some nonlinear method can be reused whole, nonlinear theory is much less linear The Mature, because of way too plex and difficult in the works on a wide range applications in plex systems have a large number of nonlinear problems (3) semistructured and unstructured Traditional control theory mainly differential equations, state equations and mathematical transformations as research tools, its nature is a numerical method, Zhu quantitative control areas, required a high degree of control structure, easy to use quantitative mathematical methods described Huo Jian mode. And plex systems are most concerned about and need to support, sometimes it is precisely the problem semistructured and unstructured. (4) system plexity By systems engineering point of view, one must include the usual broad sense of the operation of objects and their environment. And plex system of intricate rel