To the nonlinear and time-variation industrial process with uncertainties, the setting and optimization of proportion integration differentiation (PID) parameters have been always the important study topics in the aut...
详细信息
ISBN:
(纸本)9781845648251;9781845648244
To the nonlinear and time-variation industrial process with uncertainties, the setting and optimization of proportion integration differentiation (PID) parameters have been always the important study topics in the automatic control field. The current optimization design methods are often difficult to consider the system requirements for quickness, reliability, and robustness. In this paper, a method of PID controller parameters optimization is presented, which is based on the combination of neural network theory with traditional PID control theory intelligent control algorithm. Then a PID controller based on controlalgorithm was set up and used for controlling the feeding servo system of CNC machine tool. Simulation results show that the controller can realize the online self-tuning of PID parameters according to the dynamic changes of load of the CNC system. It can achieve the precise control of the system machining parameters in a variety of conditions.
One kind of new programmable controller(PLC) is introduced in this paper. The advanced embedded microprocessor and Field-Programmable Gate Array (FPGA) device are applied in the PLC system. The PLC system structure wa...
详细信息
ISBN:
(纸本)9780819473639
One kind of new programmable controller(PLC) is introduced in this paper. The advanced embedded microprocessor and Field-Programmable Gate Array (FPGA) device are applied in the PLC system. The PLC system structure was presented in this paper. It includes 32 bits Advanced RISC Machines (ARM) embedded microprocessor as control core, FPGA as control arithmetic coprocessor and CAN bus as data communication criteria protocol connected the host controller and its various extension modules. It is detailed given that the circuits and working principle, I/O interface circuit between ARM and FPGA and interface circuit between ARM and FPGA coprocessor. Furthermore the interface circuit diagrams between various modules are written. In addition, it is introduced that ladder chart program how to control the transfer info of control arithmetic part in FPGA coprocessor. The PLC, through nearly two months of operation to meet the design of the basic requirements.
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