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김인수 한국소음진동공학회 1999 소음 진동 Vol.9 No.1
This paper presents a method of actively controlling the interior noise by a trim panel with hybrid feedforward-feedback control loop. The control technique is designed to minimize the vibration of panel whose motion is limited to that of a piston (out-of-plane motion). The hybrid controller consists of an adaptive feedforward controller in conjunction with a linear quadratic Gaussian (LQG) feedback controller. In order to maintain control performance of both persistent and transient disturbances, the feedback loop speeds up the adaptation rate of feedforward controller by improving damping capacity of secondary plant related with the adaptation rule. Numerical simulation and experimental result indicate that the hybrid controller is a more effective method for reducing the vibration of the panel (and therefore the interior noise) compared to using feedforward controller.
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김인수,Kim In-Soo 한국군사과학기술학회 2004 한국군사과학기술학회지 Vol.7 No.2
In this paper, the measurements preprocessing algorithm for the fading of bearing and frequency measurements is proposed, which can improve the performance of BFTMA(Bearing and Frequency Target Motion Analysis). The fading and detection relation between bearing and frequency are rigorously established for measurements preprocessing, and BFTMA can be carried out the estimation of target motion by using measurements preprocessing. Batch estimation with bearing and frequency using the proposed algorithm can be applied to estimate the initial target states despite of the fading of frequency measurement. Simulation results show that BFTMA using the proposed measurements preprocessing has superior estimation performance, compared with batch estimation using only bearing measurements.
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김인수,강치우 한국군사과학기술학회 2002 한국군사과학기술학회지 Vol.5 No.3
In this paper, a statistical meaning that the 1% frequency value which is used as a basis for the temperature specification generation for weapon systems is similar to $3{\sigma}$ frequency value of a year is presented, and the theoretical reference for temperature specification generation is made. The new method which extracts the 1% frequency value from general weather data, not depending on long term temperature hour data, is established, and the temperature analysis result of East Asia is also presented by using this method. On the basis of these result, operational temperature for the weapon systems to be used in the area of East Asia is recommended.
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