Yang Y-J – TechConnect Briefs

A Pressure Sensor Array with Sensing Ragnes Tunable by Drving Frequency

Lai Y.-T., Yang Y-J, National Taiwan University, TW

This work presents the development of a novel pressure sensing array which sensing ranges are tunable during operation. The sensing element consists of carbon nanotubes (CNT) dispersed in nematic liquid crystals composites. The sensing ranges [...]

Development of A 4X4 Hybrid Optical Switch

Liao B.T., Yang Y-J, National Taiwan University, TW

In this paper, the design and fabrication of a 4x4 hybrid optical switch, which is composed of a MEMS-based silicon micro-mirror array and a mini-actuator array, is presented. The silicon micro-mirror-array structure, which includes vertical [...]

Fabrication and Characterization of Thermo-pneumatic Peristaltic Micropumps

Liao H-H, Liao W-C, Liao H-H, Liao W-C, Yang Y-J, National Taiwan University, TW

In recent years, the application of microelectromechanical systems (MEMS) technology on biomedical fluidic analysis has progressed rapidly. By minimizing the system, the time of analysis and reaction can be effectively shortened. Also, the quantities of [...]

Transient Analysis of Snap-through Behavior of a MEMS Optical Switch

Huang Y-Y., Yang Y-J, National Taiwan University, TW

In this work, we present the study of the transient behaviors of the bi-stable mechanism used for a MEMS optical switch. The major part of the bi-stable mechanism consists of two constrained curved structures (the [...]

Optimization of Disk-type Piezoelectric Transformers

Kuo C-W, Kang C-Y., Huang Y-Y., Lee C-K, Yang Y-J, National Taiwan University, TW

In this work, we present the optimization of two disk-type piezoelectric transformers (PTs) by using the elite Genetic Algorithm (GA) and the finite-element solver, NTUPZE. The design goal is to optimize the voltage gain as [...]

Optimization of Piezoelectric Transformers Using Elite Genetic Algorithm

Kang C-Y., Lee C-K, Yang Y-J, National Taiwan University, TW

In this work, we present the optimization work for piezoelectric transformers (PT) by using the elite Genetic Algorithm (GA). The Finite-element solver, NTUPZE, is used to calculate the behaviors of piezoelectric transformers. The design parameters [...]

Macromodeling for Microfluidic Channels

Kuo C-W, Chein C-M, Yang Y-J, National Taiwan University, TW

In this paper, we present a methodology of generating microfluidic macromodels (reduced-order models) for 3-D non-linear microchannels. Compared with the full-meshed simulations, the generated macromodels not only provide accuracy results, but also give three-orders-of-magnitude speed-ups. [...]

Development of a 3-D Finite-element Solver for Piezoelectric Transformer Analysis

Chen Y-M, Lee C-K, Yang Y-J, National Taiwan University, TW

Piezoelectric transformers step up or step down input voltages by electrical/mechanical/electrical conversion. Piezoelectric transformers have been proved to be promising alternatives for magnetic transformers. Furthermore, since the fabrication technology of thin-film piezoelectric materials becomes mature, [...]

MEMS/NEMS Dynamics Measurement Tool Using The Stroboscopic Principle

Liao H-H, Yang Y-J, National Taiwan University, TW

Recently, the rapid growth of micro- and nano-electromechanical systems (MEMS/NEMS) boosts the demands of advanced diagnostic tools and characterization techniques. One of the most critical demands is the high-resolution tools for measuring MEMS/NEMS dynamic behaviors, [...]

Parallelization of BEM Electrostatic Solver Using a PC Cluster

Tang H-K, Yang Y-J, National Taiwan University, TW

In this paper, the application of parallel-processing techniques for electrostatic calculation is presented. Evaluating the pre-conditioner used for inverting the system matrix of a boundary-element-method (BEM) electrostatic solver (Fastlap) is one of the most time [...]