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This paper studies computing the l∞-induced norm of multi-input/multi-output (MIMO) linear time-invariant (LTI) discrete-time systems, which is called the l1 analysis problem. Because such a computation involves an infinite-dimensional matrix, this paper employs a truncation idea to approximately deal with the l1 analysis problem. More precisely, this paper develops two methods for computing the l...
This paper describes the design of the lower limb wearable robot. When we design the wearable exoskeleton robot for rehabilitation, the major issue to be considered is the need for the robot and the patient to act mutually. The movement of the robot should be similar to the human's movement because they will move at the same time when the human wears the exoskeleton. Therefore, the robot should have...
In this paper, robust attitude determination based on the indirect extended Kalman filter is proposed. For the nano-satellite, there are only two vectors of magnetic vector and sun vector for vector measurement without redundant sensors. Accordingly, the three-axis attitude determination using conventional algorithm is impossible when one of the vectors is not available. The proposed attitude determination...
Nowadays energy efficiency in power electronics has been drawn a more attention as the worldwide energy crisis was raised up. To achieve high efficiency, thermal engineering in the design and construction of power conversion modules (or Intelligent Power Modules) are crucial in their rating and applications because the operation temperature or junction temperature (which is a maximum temperature rise...
This paper presents a high dimming ratio LED driver for automotive lighting applications which require avoiding EMI radiation. In order to accomplish a high dimming ratio LED driver, the preloading inductor current methodology is proposed for the power stage of the proposed circuit to achieve the fast transient response time during the LED load switching. The proposed circuit receives the input voltage...
R&D budget has been recently increased rapidly by our government's direction under the recognition that strong R&D policy lead to the wealth of the nation. The methodologies for effective evaluation have received great attention was increased. We had established the laws to evaluate and man age the performance of national R&D programs in 2005. The previous and current R&D evaluation...
The oxidation free copper nanoparticles were synthesized by electron beam irradiation in the ethylene glycol matrix without reduction agent. This electron beam irradiation reduction method (EBIRM) was simple and clean process because of unused the reduction agent. The metal precursor solution was prepared as fellow. The CuSO4·5H2O and polyvinylpyrrolydone (PVP) were soluted in the ethylene glycol...
In this paper, a low complexity ordered successive interference cancellation (OSIC) equalizer based on minimum-mean squared error (MMSE) criterion is proposed for suppressing intercarrier interference (ICI) caused by time-selective channels in OFDM systems. The proposed scheme exploits a low complexity MMSE equalizer and a partial MMSE-OSIC equalizer appropriately, according to symbol selection algorithm...
To improve spectrum utilization, cognitive radio attempts to use temporarily unoccupied spectrum which is referred to spectrum hole in cognitive radio. In this paper, we introduce novel spectrum management algorithms for cognitive radio. We introduce a heuristic matching algorithms which is named cost minimized matching. The heuristic algorithm proposed in this paper outperforms the general random...
To reduce handover overhead such as signaling overhead and latency, optimal handover algorithm is needed for mobile multi-hop relay (MMR) systems. This article proposes a novel handover method that reduces inter-cell handover but increases intra-cell handover events, because inter-cell handover has more overhead in view of the system and gives more latency time to users rather compared to intra-cell...
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