Self-tuning PID Control of Induction Motor Speed Control System Based on Diagonal Recurrent Neural Network

Chong Chen
2015 International Journal of Control and Automation  
The performance optimization of induction motor speed control system is studied and self-tuning PID controller based on diagonal recurrent neural network (DRNN) is presented in this paper. Neural network control does not require the precise mathematical model of the system, and it only needs to train neural network online or offline, then use the training results to design the control system. It is applicable of the nonlinear, strong coupling and multi variable system, which is composed of
more » ... ter and induction motor. The speed regulation control performances are tested on the experimental platform constructed by SIMATIC S7-300 power PLC. The results of experiment indicate that, compared with conventional PID controller, induction motor speed control system, which is controlled by self-tuning PID controller based on DRNN, has better static-dynamic and following performances, stronger anti-interference ability and robustness. Copyright ⓒ 2015 SERSC 329 Realization of the System Communication The system communication is composed of three parts: the OPC communication between WinCC and Excel, the MPI communication between industrial computer and PLC, and the PROFIBUS-DP communication between PLC and inverter. WinCC monitor PLC through MPI communication, and collect real-time speed data from PLC through OPC communication. The PROFIBUS-DP communication realizes PLC control of inverter by constructing the network structure of control system, and finally realizes long distance field control. In this paper, we will mainly introduce the realization of PROFIBUS-DP communication, because it plays the most important role in the system control [12]. Hardware Connection: PROFIBUS cable and connector are adopted to connect DP port in CPU module, which is RS485 port, with RS485 port in PROFIBUS-DP module CB15, which is installed in the front panel of MMV inverter. Where, CPU315-2DP is selected as master station and MMV inverter is selected as slave station. The Setting Of Mmv Inverter In Electric Drive System : MMV inverter supports two communication modes, which are USS and PROFIBUS-DP protocol. If the latter is used, CB15 is used accordingly. Firstly, install CB15 in front panel of the inverter and then set the parameter P099 as one, which means selecting the PROFIBUS module. Lastly, the parameters appointed for CB15 are as follows: P918=7: set PROFIBUS-DP slave station address, P927=1: set PROFIBUS-DP remote parameter control, P928=1: set PROFIBUS-DP complete remote control, P963=7: display PROFIBUS-DP network baud rate, in this paper it is 1.5Mbps. Determine User Data Structure: Variable transmission outline defines five PPO types, while PROFIBUS-DP module CB15 only supports PPO1 and PPO3. The load and tracking experiments are performed based on S7-300 experimental platform. Compared with traditional PID control, the effectiveness and advancement of this control method is proved. Therefore, the better control effect is acquired, meeting the requirements of high performance control of induction motor speed control system in V/F mode.
doi:10.14257/ijca.2015.8.10.30 fatcat:jz6phg5bkbbodacfgujkhunrl4