Development of Magnetic Levitation System for Science and Technology Education: Magnetic Levitation Control by Using a Hall Element Displacement Sensor with Neural Network

Abstract

SUMMARY In this study, we developed a magnetic levitation system using a Hall element displacement sensor with neural network for science and technology education. The sensor configured with three Hall elements was devised in order to measure displacement from an electromagnet to a levitated object with a permanent magnet. Use of the Hall element displacement sensor achieves a lower cost magnetic levitation system. Furthermore, three‐layered feedforward neural network was utilized in order to improve the precision of the Hall element displacement sensor. Finally, operation verification of the developed magnetic levitation system was conducted by designing state feedback regulator with observer.

Development of Magnetic Levitation System for Science and Technology Education: Magnetic Levitation Control by Using a Hall Element Displacement Sensor with Neural Network

“…5 to derive displacement of a levitated object from output voltage of each Hall element [7,8]. 5 to derive displacement of a levitated object from output voltage of each Hall element [7,8].…”

“…Specifically, we employed the sensor head ZX2-LD50L and amplifier unit ZX2-LDA11 by OMRON Corp.; however, this sensor adds a cost about 80,000 yen. Thus, in this study we developed a maglev system using a Hall element displacement sensor [7,8] that can be manufactured for just several hundred yen, thus meeting Requirement 3. Here, we explain about the system configuration and derivation of its mathematical model.…”

“…On the other hand, the maglev system considered in this study uses a Hall element sensor [7,8], instead of laser sensor, to measure displacement of the levitated object as shown in Fig. 2.…”

“…In this context, we proposed a displacement sensor [7,8] with three Hall elements arranged in a triangle so that displacement of a levitated object can be measured accurately despite of small horizontal movements. Thus manufactured Hall element displacement sensor using the elements A1324LUA-T is shown in Fig.…”

“…In this context, we have developed education materials in control engineering [5][6][7][8][9][10] for the purpose of continuous fostering of science-and technology-savvy personnel. We focused on control engineering for the following reasons.…”