多泵智能控制器的研究与实现-电力电子与电力传动专业论文.docxVIP

江苏科技大学工学硕士学位论文 江苏科技大学工学硕士学位论文 II Abstract Abstract With the development of the domestic economy, businesses and residents become increasingly demanding for water supply. Diversification of supply requirements also contributed to the development of the field of water control. At present the automatic control system has been widely applied to residents of the water supply. However, due to constant pressure water supply of non-linear and time-varying characteristics, combined with constant water supply systems were not accurate models, water supply system is more difficult to control with the linear method, traditional PID control cannot properly regulate their parameters, so, adaptability is poor. Fuzzy control is based on the characteristics of the human mind with basis of fuzzy logic, unlike classical control that requires the accurate description of the transfer function, put fuzzy controller and PID controller together and the parameters 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 specific circumstances of the project, so, this controller is bound to be more adapted to changing conditions, and simulation also shows the superiority of the fuzzy PID controller. When the water supply system requires several different type power of motor, the motor switch has been a difficult. When the motor switch from the inverter power to power-frequency, the impact shocks of current can cause large pressure, this waste the energy 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 C8051F020 control inverter output locked in power frequency, once locked, switch command issued. Reduce the impact of current and improve the system security. The subject stood a product point of view, access to a wealth of information, com