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Magnetorheological elastomer (MRE) is a smart material where its stiffness vary with presence of magnetic field.These special properties lead to various application as mechanical devise such as damper. Damping coefficient is criteria that need to consider while designing the device. This paper aims to study the effect of iron filling and elastomer composition on a damping coefficient of MRE. Five MRE specimens with different CIP composition from 30 to 70% was prepared.the speciment was tested with testbed which is has a Constance distance permanent magnet(5mm) and motor speed (131.9Hz). The vibration amplitude in frequency domain was used to calculate the damping coefficient by half-power bandwidth equation. Experimental result indicates that the highest damping coefficient is at 30% CIP concentration and the lowest is at 70% CIP composition. As a conclusion, the damping coeficiet is decrease with increasing in CIP composition.this finding useful to design an optimal active damper for mechanical component.

Laser micromachining provide significant effect in thin film solar industrial field especially in determining cell efficiency of each panels. However, there is an issue in determining scribing failure or defect on solar module. This research aims to investigate the defects of laser micromachining process in thin film solar module in manufacturing fields. Machine vision inspection system is used as inspection tools and to investigate the defect of laser micromachining in thin film solar cells. As a result, two major defects is define which is scribe line quality and scribe line position defects in every scribe line. By identifying the defect cause by laser micromachining through machine vision, quality control plan can be taken together to prevent reoccurrence.

Controlling the actuator in micro to microscale positioning is the challenge in the development of smart material actuator. The design of the existing commercial piezoelectric actuator is limited due to the material properties itself such as brittle which require special packaging and protection in order to avoid creep occurred. Magnetorheological linear actuator representing a relative new class in actuator development. the flexibility in MRE material potentially overcome the limitation of the piezoelectric actuator. This paper presenting the development of closed loop control system including the dynamic model, plant model and PID controller for linear MRE actuator. The control system was successfully developed and the MRE linear actuator able to generate the displacement at certain steady state error.

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