变水量系统Smith模糊PID复合控制方法
摘要：针对集中空调冷水系统存在非线性、滞后性大、时变性强等特点, 提出了一种Smith-模糊PID复合控制方法。首先构建了集中空调冷水系统的数学模型;其次分别介绍了模糊PID和Smith预估补偿的原理;最后结合两者优势, 提出根据系统状态决定是否应在模糊PID控制的基础上加入Smith预估补偿的复合控制方式。仿真对比表明:采用该控制方式后, 系统能够快速达到设定值, 动态性能较好, 并且抗干扰能力强, 即便系统参数发生变化, 依然能够保持较好的适应性。将此控制方法应用到实验平台上, 实验数据表明, 相较于传统PID控制, Smith-模糊PID复合控制具有更好的节能效果。
关键词：冷水系统 模糊PID控制 Smith预估补偿 复合控制 节能
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[11]唐贤健, 郭平生, 曾坤, 等.模糊自适应PID控制在空调系统中的应用[J].制冷与空调, 2010, 24 (3) :77-80
[12]ATTIA A H, REZEKA S F, SALEH A M.Fuzzy logic control of air-conditioning system in residential buildings[J].Alexandria Engineering Journal, 2015, 54 (3) :395-403
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[14]张荷芳, 王洁, 易善伟.基于Smith预估的模糊PID串级中央空调水系统控制[J].西安工业大学学报, 2012, 32 (4) :330-333
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[16]黄友锐.PID控制器参数整定与实现[M].北京:科学出版社, 2010:8-10
[2]李浩, 马新华, 施卫东, 等.自适应模糊PID控制在水泵试验台流量调节中的应用[J].水电能源科学, 2011, 29 (9) :147-149
[3]赵丹, 张九根, 黄艺新, 等.改进粒子群算法在空调冷冻水系统的控制研究[J].科技通报, 2016, 32 (7) :117-120
[4]RODRGUEZ C, NORMEY-RICO J E, GUZMN J L, et al.On the filtered Smith predictor with feedforward compensation[J].Journal of Process Control, 2016, 41:35-46
[5]安连祥, 马华民, 刘永刚, 等.基于改进Smith预估器的二阶时滞系统[J].计算机仿真, 2011, 28 (1) :198-200
[6]李浩, 吴晓君, 唐婷, 等.关于变风量空调系统控制性能优化设计[J].计算机仿真, 2016, 33 (9) :345-349
[7]LJUNG L.Black-box models from input-output measurements[C]∥Instrumentation and Measurement Technology Conference, 2001:138-146
[8]刘静纨, 魏东, 戴正伟.基于模糊PID控制的VAV控制系统研究与实现[J].北京理工大学学报, 2010, 30 (8) :920-924
[9]张杰.中央空调水系统节能控制研究[D].合肥:中国科学技术大学, 2011:29-31
[10]庄凯, 张九根, 黄亚光.中央空调冷冻水系统的优化控制与仿真[J].科技通报, 2015, 31 (1) :240-244
[11]唐贤健, 郭平生, 曾坤, 等.模糊自适应PID控制在空调系统中的应用[J].制冷与空调, 2010, 24 (3) :77-80
[12]ATTIA A H, REZEKA S F, SALEH A M.Fuzzy logic control of air-conditioning system in residential buildings[J].Alexandria Engineering Journal, 2015, 54 (3) :395-403
[13]蒋红梅, 任庆昌.变风量空调的自适应Smith控制仿真研究[J].计算机仿真, 2012, 29 (10) :228-231
[14]张荷芳, 王洁, 易善伟.基于Smith预估的模糊PID串级中央空调水系统控制[J].西安工业大学学报, 2012, 32 (4) :330-333
[15]FELIU-BATLLE V, PREZ R R, GARCA F J C, et al.Smith predictor based robust fractional order control:application to water distribution in a main irrigation canal pool[J].Journal of Process Control, 2009, 19 (3) :506-519
[16]黄友锐.PID控制器参数整定与实现[M].北京:科学出版社, 2010:8-10
Smith-fuzzy PID compound control strategy for variable volume water system
Abstract: Aiming at the characteristics of chilled water system in central air conditioning, such as nonlinear, large hysteretic nature and strong time-varying, proposes a Smith-fuzzy PID compound control strategy.Develops a mathematical model of chilled water system in the central air conditioning system.Presents the principles of fuzzy PID and Smith predictive compensation respectively.Combining advantages of two methods, proposes a compound control strategy which adding Smith predictive compensation to fuzzy PID control according to the system state.Simulation results show that the system can quickly reach the set value by this control strategy, with better dynamic performance and anti-interference ability.Even though the parameters vary, the system is still of good adaptability.Applies the control strategy to an experimental platform, and the experimental data shows that compared with traditional PID control, Smith-fuzzy PID compound control strategy is more energy efficient.
Keywords: chilled water system; fuzzy PID control; Smith predictive compensation; compound control; energy saving;
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