Study On Fuzzy Decoupling Control Of Temperature And Humidity Of Air Conditioning System For A Proceracy

Central air conditioning system is the most important part of Building Automation System,but the air conditioning system is multi-variable,strong coupled,nonlinear and time-varying,which makes its design,operation and management are more difficult. Over the years,the control of air conditioning system has been a technical problem. Because of the serious coupling among variables,the ideal control result can hardly be gotten by single loop PID controller and even can not normally work.But,in the actual project,stable operation is particularly focused on the issue.This project is based on the weak current control system in integrated service building of a proceracy to research the k-1 temperature and humidity decoupling control. The main loops in the system are heater-return temperature loop and chilled water valve-return air humidity loop.Adopt the method of step response to set the model of the two loops' every channel and its relationship between variables.Then,to solve the problem of coupling between variables,carry on foreword feedback decoupling strategy. Use the Fuzzy control algorism in the decoupled two loops to set the membership function and corresponding control rules and get the output variables sheet.Finally, establish the air conditioning control system model in MATLAB simulation environment,which testify the Fuzzy decoupling control method.Simulation result shows that the strategy eliminates the coupling between control loops and acquires a satisfactory effect.