การพัฒนาพีแอลซีแบบฝังตัวสำหรับการสอนทางวิศวกรรมเมคคาทรอนิกส์

The major obstacles to teaching Programmable Logic Controller (PLC) is a variety of PLCs and the rapid pace of technological development with new models and innovations. Moreover, costs incurred in the setting up of comprehensive and modern PLC laboratory facilities, and in the required periodic updating of teaching material and equipment are, as a result, very high. After investigated the conception and features of PLC and embedded system, the development of the embedded PLC for teaching machatronics students is proposed in this paper with the seamless combination of the LabVIEW software and the ARM Microcontroller with the LabVIEW embedded module. The flexibility of the proposed PLC makes it relatively easy and less costly to teach the basic principle of different kinds of PLCs due to their variety and rapid change. The implementation of the embedded PLC is discussed and evaluated. The results of evaluation shows that embedded PLC can be taught satisfyingly

ตัวควบคุมฟัซซีลอจิกสำหรับระบบเซอร์โวตำแหน่งไฮดรอลิกไฟฟ้า

Since classical PID controllers are sensitive to variations in the electro-hydraulic position servo system (EHPSS) parameter, especially, when the load changes. Fuzzy Logic Controllers do not need precise information about the system variables in order to be effective. A Fuzzy Logic Controller (FLC) for the EHPSS is proposed in this paper. The EHPSS in this study consists of cylinder, servo valve (linear motor type), power unit, load, linear potentiometer, amplifier card, and DAQ card. A FLC is designed based on the expert knowledge. The fuzzy inputs are an error (e) and a change of position error