• 대한기계학회논문집A
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• 제39권3호
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• pp.327-335
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• 2015

본 논문에서는 열간압연 ROT 공정에서 고강도 내후성강을 대상으로 압연 강판의 길이방향의 온도와 재질을 제어하기 위하여 독립냉각제어(ICC) 라는 새로운 제어개념을 제안하였다. ROT 공정을 전단냉각 및 후단냉각으로 분리하였으며, 각각의 독립공정에 대하여 온도제어 모델을 개발하였다. ICC 제어는 열간압연 공장의 온라인 데이터, 제어상의 문제점 및 내후성강의 TTT 선도로부터 도출하였다. 제안된 ICC 제어의 알고리즘은 변태발열에 의한 온도 외란을 이용하여 타당성을 검증하였다. 또한 열연공장에서 온라인으로 테스트 결과 강판의 온도제어 정도가 향상되었음을 입증하였다.

• 아동학회지
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• 제37권1호
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• pp.61-71
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• 2016

Objective: The purpose of this study was to confirm if there are gender differences in influences of parental support, control, and school life adjustment on suicidal ideation of adolescents and to examine the mediating effect of depression on the influences of independent variables on their suicidal ideation. Methods: This study comprised a total of 671 students in seventh and eighth grades in Seoul and Gyeonggi-do. The data were analyzed for frequency, average, and standard deviation, using the t-test, Pearson's correlation analysis, stepwise regression analysis, hierarchical multiple regression analysis, and the Sobel test. Results and Conclusion: First, significant differences among adolescents' gender were shown in fathers' psychological control, mothers' behavior control, and suicidal ideation. Second, in the case of male adolescents, all independent variables were found to have a full mediating effect on their suicidal ideation. Meanwhile, in the case of female adolescents, independent variables except for mothers' psychological control were found to have a full mediating effect on their suicidal ideation. Mothers' psychological control was found to have a partial mediating effect on suicidal ideation of adolescents for both genders.

• 자동차안전학회지
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• 제5권2호
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• pp.11-16
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• 2013

This paper presents a unified control algorithm of independent braking and steering for collision avoidance. The desired motion of the vehicle in the yaw plane is determined using the probabilistic risk assessment method based on target state estimation. For the purpose of coordinating the independent braking and steering, a non-linear vehicle model has been developed, which describes the vehicle dynamics in the yaw plane in both linear and extended non-linear ranges of handling. A control allocation algorithm determines the control inputs that minimize the difference between the desired and actual vehicle motions, while satisfying all actuator constraints. The performance of the proposed control algorithm has been investigated via computer simulations conducted using the vehicle dynamics software CARSIM and Matlab/Simulink.

• The Journal of Asian Finance, Economics and Business
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• 제8권3호
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• pp.391-397
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• 2021

This study examines the effect of independent commissioners and the Audit Committee on internal control disclosure and its implications for earnings management in the banking industry listed on the Indonesia Stock Exchange for the period 2016-2018. In this study, a purposive sampling technique was used, combined with two multiple regression analysis models. The final sample for this study comprised 30 companies over the three years of observation, such that there were 90 observations in total. This study indicates that independent commissioners, as measured by their composition, do not affect the disclosure of internal control. However, as measured by the number of members, the Audit Committee had a positive effect on internal control disclosures. This study also indicates that the disclosure of internal control as measured by the Internal Control Disclosure index affects reducing the negative practice of earnings management. This study proves that the Audit Committee's role is very dominant in assisting the Board of Commissioners in supervising internal control. This has implications for reducing earnings management practices. However, the Independent Commissioner's role in the Indonesian banking industry has not been optimal in carrying out the supervisory function in this study.

• 한국안전학회지
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• 제32권5호
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• pp.47-53
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• 2017

In this study, we propose a new control system that effectively utilizes the interaction effect of control force through the connection of stiffness member for seismic performance enhancement of two adjacent structures equipped with active tuned mass damper (ATMD). The efficiency of the proposed control system is verified by comparing with the existing independent control system through the numerical simulations of the 10th- and 12th-story buildings. From the numerical results, it is confirmed that the proposed method can show similar or better control performance even with more economical control capacity than the existing independent control system. Another advantage is that the existing system does not exhibit the adaptive control performance in emergency of failure of one control device, whereas the proposed system can achieve successful adaptive control performance by economically and efficiently utilizing the interacting control effect through the connection member.

• 제어로봇시스템학회논문지
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• 제21권2호
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• pp.87-94
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• 2015

This paper proposes a situation awareness method based on data fusion and independent objects for autonomous driving in on-road environment. The proposed method, designed to achieve an accurate analysis of driving situations in on-road environment, executes preprocessing tasks that include coordinate transformations, data filtering, and data fusion and independent object based situation assessment to evaluate the collision risks of driving situations and calculate a desired velocity. The method was implemented in an open-source robot operating system called ROS and tested on a closed road with other vehicles. It performed successfully in several scenarios similar to a real road environment.

• Journal of Power Electronics
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• 제13권1호
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• pp.77-85
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• 2013

This paper proposes a new dead time compensation method of independent six-phase permanent magnet synchronous motors (IS-PMSM). The current of the independent phase machines contains odd-numbered harmonics because of the dead time and the nonlinear characteristics of the switching devices. By using the d-q-n three-dimensional vector analysis, these harmonics can be extracted at the n-axis current. Thus, the current distortion can be compensated by controlling the n-axis current of the IS-PMSM to zero. The proposed method is simple and can be easily implemented without additional hardware setup. The validity of the proposed compensation method is verified with simulations and several experiments.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 1997년도 춘계학술대회논문집; 경주코오롱호텔; 22-23 May 1997
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• pp.301-307
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• 1997

In this study, a new modified independent modal space control (IMSC), which relaxes the fundamental hardware limitation of IMSC, is suggested to handle vibration control problems using a virtual passive controller. This method has adapted a new stable switching algorithm between controlled modes and a virtual vibration absorber as a virtual passive controller in the independent modal space. It has been found that the new modified IMSC suggested in this paper, which can reduce the number of actuators, is shown to be simple and efficient in a realistic example of vibration control of a cantilever beam.

• Journal of international Conference on Electrical Machines and Systems
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• 제2권2호
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• pp.197-201
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• 2013

Cascaded H-bridge multilevel inverter requires independent DC voltage sources to produce multi output voltage levels. When it needs to generate more levels in the output voltage wave, the number of independent DC voltage sources usually limits its extension. To solve this problem, we propose a cascaded H-bridge multilevel inverter employing a front-end flyback converter for unifying input DC voltage sources. After theoretical analysis of the proposed circuit, we verify the validity of the proposed inverter using computer-aided simulations and experiments.

• 드라이브 ㆍ 컨트롤
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• 제15권4호
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• pp.139-147
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• 2018