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이인수,이경환 제어로봇시스템학회 2011 제어로봇시스템학회 국내학술대회 논문집 Vol.2011 No.5
In this paper we proposed a high efficiency heater using carbon heating material for aquarium. The proposed aquarium heater based on carbon can save energy and has less impact on environmental issues. From the experiment results we know that the proposed carborn-based heater is more efficient than commercial heater as much as 20.6% in power consumption. for aquarium.
신경회로망과 이산웨이블렛변환을 이용한 비선형시스템의 고장진단
이인수,서해문,남윤석 제어로봇시스템학회 2011 제어로봇시스템학회 국내학술대회 논문집 Vol.2011 No.5
In this paper, we propose a fault diagnosis method using neural networks and DWT(discrete wavelet transform) to detect and isolate faults in nonlinear systems. In the proposed method, the fault is detected as the errors between the system output and the neural network nominal system output cross a threshold. Once a fault in the system is detected, the system output signals are converted to the frequency domain by DWT. Then the ART2 NN fault classifier isolates the fault. The algorithm contains three main steps: a fault detection part by threshold test, a data preprocessing part via DWT and a fault isolation part by fault classifier. From the computer simulation results, it is verified that the proposed fault diagnosis method can be performed successfully to detect and isolate faults in a nonlinear system.