LSM 외란을 고려한 무전원인가형 자기부상 시스템의 LQ-servo 제어기 설계 = LQ-servo Design for Magnetic Levitaton systems with a Passive Carrier Considering Disturbance of LSM

다국어 초록 (Multilingual Abstract)

To look at the transfer system of LCD, OLED, semiconductor, etc, it used a roller and rotary motor system in the
past. The disadvantages of this system are contaminated conveying vehicle by foreign substances attached to roller,
breakdown of the glass itself caused by the vibration of the conveying vehicle, etc. In particular, large dust collecting
systems were required to minimize dust while being transported. Such factors largely caused the high cost of LCD, OLED,
and semiconductor. To improve these, non-contact magnetic levitation transport systems have been proposed and
studied. If applying the magnetic levitation transport system, it may reduce dust, noise, and so on, apply curved track
rail, and reduce scale of track, which may lead to space saving. To look at the structure of such a magnetic levitation
distribution transport system, it can be divided largely into propulsion system and levitation system.
This paper investigated two systems: as propulsion system, LSM whose control accuracy is high and response speed
is fast although equipment ratio is higher than LIM and as levitation system, EMS that does not require permanent
magnet and less expensive in consideration of economic feasibility although control difficulty may be higher than
Hybrid-EMS. If applying LSM as propulsion system, normal force for levitation is generated. This force acts as
disturbance in controlling the levitation system. This levitation disturbance is difficult to be measured, realistically. This
is why there is a difficulty in applying the levitation disturbance to design a controller for the levitation system.
This paper aims to predict such a LSM levitation disturbance through FEM analysis and propose its application into
LQ-servo control design, state-of-the-art technique
Chapter 2 describes the EMS (ElectroMagnetic Systems)-type levitation electromagnet using magnetic equivalent
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circuit and Chapter 3 identifies the characteristics of the existing PID controller and predicts the LSM disturbance through
FEM analysis. Based on the facts predicted through the FEM analysis, this paper proposes its application into LQ-servo
control design, state-of-the-art technique. Based on the findings from the previous chapters, Chapter 4 compares two
controllers through matlab simulation and verifies the proposed method through experiment. Chapter 5 makes a
conclusion to the designing of LQ-servo controller in non-electric-approved magnetic levitation system considering LSM
disturbance through simulation and experiment.