• Korean Journal of Computational Design and Engineering
• /
• v.20 no.3
• /
• pp.221-229
• /
• 2015

M&S (Modeling & Simulation) based design is widely accepted for the development of the future weapon system with better performance in a cheaper and faster way. Integrated simulation environment (ISE) is needed for the M&S based design. On the ISE, system engineers can not only verify design options but also validate system requirements. In this paper, we propose architectural models of the integrated simulation environment (ISE) which incorporates mission effectiveness M&S (Modeling & Simulation), system performance M&S, the optimization model of integrated performances, digital mockup and virtual prototype. The ISE architectural models may be used to implement the ISE for the development of the future unmanned ground combat vehicle.

• Journal of the Korea Institute of Information and Communication Engineering
• /
• v.6 no.1
• /
• pp.103-108
• /
• 2002

The metal-oxide-semiconductor field-effect transistor(MOSFET) has undergone many changes in the last decade In response to the constant demand for increased speed, decreased power, and increased packing density. The state -of-the-art simulation programs are developed by engineers and scientists. This paper has compared commercial programs of Micro-tec and ISE-TCAD in device simulation. This paper investigates LDD MOSFET using two simulators. Bias condition is applied to the devices with gate lengths(Lg) 180㎚. We have presented MOSFET's characteristics such as I-V characteristic and electric field, and compared Micro-tec with ISE TCAD.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
• /
• 2001.05a
• /
• pp.321-324
• /
• 2001

The metal-oxide-semiconductor field-effect transistor(MOSFET) has undergone many changes in the last decade in response to the constant demand for increased speed, decreased power, and increased packing density. This paper has compared Micro-Tec with ISE-TCAD. This paper investigates LDD MOSFET using two simulators. Bias condition is applied to the devices with gate lengths 180nm. We have presented MOSF ET's characteristics such as I-V characteristic, electric field. and compared with Micro-Tec and ISE-TCAD.

• Journal of the Institute of Electronics Engineers of Korea SD
• /
• v.42 no.3 s.333
• /
• pp.1-8
• /
• 2005

In this paper, we analyzed the DC and RF characteristics of $0.1\;{\mu}m$ metamorphic high electron mobility transistor (MHEMT) using the ISE-TCAD simulation tool. we also analyzed the effects or the scaling on vertical and lateral dimensions such as a gate length, source-drain spacing, and channel thickness. We discussed the degradation of extrinsic transconductance $g_{m,max}$ in the MHEMTs adopting the gate length $(L_g)$ of $sub-0.1\;{\mu}m$. We suggested the model describing the effects on the vertical and lateral parameter scaling.

• Proceedings of the Korean Society of Precision Engineering Conference
• /
• 2010.05a
• /
• pp.535-536
• /
• 2010

• Proceedings of the IEEK Conference
• /
• 2002.07a
• /
• pp.54-57
• /
• 2002

In this paper, an adaptive beam tracing method with revised subdivision technique is proposed, in which the beam is generated by a set of three rays. According to reflection and/or refraction of the rays on the buildings and/or ground, additional rays are generated adaptively and the beam is subdivided efficiently and automatically. After generation of the set of beams, we transform the electromagnetic wave propagation data into volume data. Then one can visualize the data of propagation with reflection, refraction and interaction in full three dimensional space at any viewpoint by the so-called ray casting algorithm, which is one of the most useful methods in compute. graphics(CG).

• Membrane and Water Treatment
• /
• v.9 no.2
• /
• pp.129-136
• /
• 2018

In this contribution, the control of multivariable reverse osmosis (RO) desalination plant using proportional-integral-derivative (PID) controllers is presented. First, feed-forward compensators are designed using simplified decoupling method and then the PID controllers are tuned for flux (flow-rate) and conductivity (salinity). The tuning of PID controllers is accomplished by minimization of the integral of squared error (ISE). The ISEs are minimized using a recently proposed algorithm named as teacher-learner-based-optimization (TLBO). TLBO algorithm is used due to being simple and being free from algorithm-specific parameters. A comparative analysis is carried out to prove the supremacy of TLBO algorithm over other state-of-art algorithms like particle swarm optimization (PSO), artificial bee colony (ABC) and differential evolution (DE). The simulation results and comparisons show that the purposed method performs better in terms of performance and can successfully be applied for tuning of PID controllers for RO desalination plants.

• Journal of Power Electronics
• /
• v.14 no.2
• /
• pp.369-382
• /
• 2014

A growing dynamic electrical demand has created an increasing interest in utilizing nonconventional energy sources like Photovoltaic (PV), wind power, etc. In this context, this paper focuses on the design and development of a composite power controller (CPC) in the decoupled double synchronous reference frame (DDSRF) combining the advantages of direct power control (DPC) and voltage oriented control (VOC) for a PV sourced grid connected inverter. In addition, a controller with the inherent active filter configuration is tested with nonlinear and unbalanced loads at the point of common coupling in both grid connected and autonomous modes of operation. Furthermore, the loss and reactive power compensation due to a non-fundamental component is also incorporated in the design, and the developed DDSRF model subsequently allows independent active and reactive power control. The proposed developed model of the controller is also implemented using MATLAB-Simulink-ISE and a Xilinx system generator which evaluate both the simulated and experimental setups. The simulation and experimental results confirm the validity of the developed model. Further, simulation results for the DPC are also presented and compared with the proposed CPC to further bring out the salient features of the proposed work.

• Journal of the Korea Society for Simulation
• /
• v.21 no.1
• /
• pp.69-79
• /
• 2012

One of the goals of mass customization is to permit changes in the product to meet specific customer requirements without substantially impacting the cost or delivery schedule. In large assembly manufacturing industries, such as shipbuilding and commercial airplane production, customization takes place by changing components and/or modules, sometimes called interim products. Using shipbuilding as a case study, it is possible to study the impact of such changes using mass customization principles on the schedule. In large assembly manufacturing, mass customization changes would cause changes in engineering time and production time, based on the amount of change required by the customization. This work first proposes a structure for implementing mass customization in shipbuilding and then uses simulation of a simplified, theoretical shipbuilding process to evaluate the impacts of various levels of change on delivery performance.

• The Journal of Korean Institute of Communications and Information Sciences
• /
• v.35 no.1B
• /
• pp.85-94
• /
• 2010

Many RFID systems use dynamic slotted ALOHA to identify the label information of the RFID tags. One of the key problems in the RFID system is how to estimate the number of RFID tags up to the desired level of accuracy. In this paper, we present the framework of tag estimation algorithm for the collision-oblivious (CO) reader which can only decide whether the tag response is successful or not. Thus, the CO reader must rely on the success estimator to predict the RFID tag population. We propose two estimation algorithms to predict the number of RFID tags, named the memoryless success estimator (MSE) and the intersection-based success estimator (ISE). The MSE considers only the estimate obtained at the current inventory round, while the ISE finds an appropriate intersection interval of the existing estimates collected at every inventory round. Through the simulation results, we demonstrate that the ISE is a fast, accurate, and controllable estimator whose performance is close to that of the collision/idle estimators.