Research And Implementation Of The Multi-pump Intelligent Controller

With the development of the domestic economy, businesses and residents becomeincreasingly demanding for water supply. Diversification of supply requirements alsocontributed to the development of the field of water control. At present the automatic controlsystem has been widely applied to residents of the water supply. However, due to constantpressure water supply of non-linear and time-varying characteristics, combined withconstant water supply systems were not accurate models, water supply system is moredifficult to control with the linear method, traditional PID control cannot properly regulatetheir parameters, so, adaptability is poor. Fuzzy control is based on the characteristics of thehuman mind with basis of fuzzy logic, unlike classical control that requires the accuratedescription of the transfer function, put fuzzy controller and PID controller together and theparameters of the PID controller based on fuzzy control rules can be adjusted accordingly.The fuzzy control rule is actually an expert knowledge base, which is based on the specificcircumstances of the project, so, this controller is bound to be more adapted to changingconditions, and simulation also shows the superiority of the fuzzy PID controller.When the water supply system requires several different type power of motor, themotor switch has been a difficult. When the motor switch from the inverter power topower-frequency, the impact shocks of current can cause large pressure, this waste theenergy and is a potential threat to pipe network equipment, and prone to failure over time.Address the problem, put phase lock technology applied to the field of power switching,PLL in coordination with the C8051F020control inverter output locked in power frequency,once locked, switch command issued. Reduce the impact of current and improve the systemsecurity.The subject stood a product point of view, access to a wealth of information,committed to address two problems above, the specific work as follows have been done:(1) The diversity of the water supply system and working principle had been studied.Analyzed the water requirements of different situations, and derived mathematical model ofwater supply systems.(2) Design a fuzzy PID controller that parameters can be adaptive, and make a matlabsimulation to verify its legitimacy.(3) Applied phase locked power into the switch technology field, and make a matlab simulation to verify its correctness.(4) On the basis of above theory, overall design of the controller, include hardwarecircuitry and software exploitation.