H∞ 예견 제어를 이용한 차량 전복 방지 제어기 설계

임성진 제어·로봇·시스템학회 2018 제어·로봇·시스템학회 논문지 Vol.24 No.1

This paper presents a method to design a rollover prevention controller with H∞ preview control. The discrete-time statespace model, derived from 2-DOF bicycle and 1-DOF roll ones, is used for controller design. Discrete-time H∞ preview control is adopted to design a rollover prevention controller. Linear matrix inequality (LMI) is used to compute the controller gain matrix. Differential braking and active anti-roll bar are used for generation of yaw and roll moments, respectively. For yaw moment generation with differential braking, a weighted pseudo-inverse based control allocation (WPCA) is adopted. The designed controller is compared with linear quadratic (LQ) optimal preview control. To check the effectiveness of the proposed method, simulation on vehicle simulation package is conducted.

준조세 제도의 개선방안에 관한 연구

임성진 서울시립대학교 도시과학대학 세무학과 2001 稅務學論集 Vol.14 No.1

준조세 제도의 개선방안에 관한 연구

South Korea's Expansive Nuclear Power Policyand Citizen's Challenge for Change

임성진 한국동북아학회 2006 한국동북아논총 Vol.11 No.1

체르노빌 사고가 일어난 지 20년이 지난 지금 유럽선진국에서는 원자력산업이 사양산업으로 후퇴하고 있다. 이에 반해 한국정부는 지난 수십 년 동안 원자력확대를 중심으로 한 전통적인 에너지정책을 지속적으로 고수하여 현재 세계에서 여섯 번째로 큰 원자력발전용량을 보유하고 있다. 정부의 원자력중심 정책은 많은 문제점과 저항을 유발하고 있는데, 특히 방폐장문제를 둘러싸고 지난 15년 동안 전국적으로 큰 진통이 있었다. 정부는 지속적으로 방폐장 건설을 시도하였고 그때마다 주민들의 격렬한 반대운동이 일어나 많은 국민들에게 핵에너지에 대한 문제의식을 자각하게 만든 계기가 되었다. 이러한 시민들의 저항은 에너지정책에 대한 전환의 압력으로 작용하기 시작했으며, 최근 기후변화협약의 발효로 인해 한국정부는 새로운 에너지정책의 도입에 더 적극성을 보이고 있다. 그러나 이러한 변화는 원자력정책에 대한 전환이 수반되지 않고는 근본적인 한계를 벗어나기 힘들다. 이 논문은 한국의 원자력정책과 시민의 도전을 다룸으로서 한국에너지정책의 현주소와 한계를 보여주기 위한 글이다. Korea's Expansive Nuclear Power Policy and NGOs’Pressure to Change

국내 논토양 및 밭토양 중 농약유래 잔류성유기오염물질의 노출량 평가

임성진,오영탁,노진호,김승용,주형곤,이민호,윤효인,최근형,류송희,박병준,Lim, Sung-Jin,Oh, Young-Tak,Ro, Jin-Ho,Kim, Seung-Yong,Joo, Hyeong-Gon,Lee, Min-Ho,Yoon, Hyo-In,Choi, Geun-Hyoung,Ryu, Song-Hee,Park, Byung-Jun 한국환경농학회 2017 한국환경농학회지 Vol.36 No.3

BACKGROUND:This study was conducted to investigate residual organochlorine pesticides (ROCPs) in agricultural soils and crops. Agricultural soil samples and crop samples were collected from 93 cities and counties. METHODS AND RESULTS: Extraction and clean-up for the quantitative analysis of ROCPs were conducted by the modified quick, easy, cheap, effective, rugged, and safe (QuEChERS) method. Recovery and limit of detection (LOD) of ROCPs in agriculturalsoils and crops were 76.5-103.0 and 75.2-93.2%, 0.01-0.08 and $0.10-0.15{\mu}g/kg$, respectively. Detected ROCPs in agricultural soils were ${\alpha}$-endosulfan, ${\beta}$-endosulfan, and endosulfan sulfate, the residue were 2.0-12.0, 1.2-53.1, and $2.2-329.8{\mu}g/kg$, respectively. But these pesticides in all green perilla leaf and green pepper samples were not detected. CONCLUSION: These results showed that ROCPs residues in agricultural soils were not as high as crop safety threatening.

수요관리프로그램의 경제성평가기법

임성진 한국정치정보학회 2003 정치정보연구 Vol.6 No.2

물공급과 관련된 신규 댐건설 등에 대한 논의과정에서 환경단체 뿐 아니라 정부측에도 수요관리대안의 필요성에 대한 공감대가 널리 확산되고 있다. 그런데 정책적 중요성에 대한 사회적 동의에도 불구하고 그에 따른 경제적 효과에 대해서는 여전히 불확실성이 크다. 이는 무엇보다 수요관리대안이 우리나라에서는 아직 논의단계에 머물고 있어 충분한 데이터와 실증적 경험이 부족하기 때문이다. 수요관리대안의 정책적 불확실성 문제를 해결하고 이를 가치 있는 공급자원의 하나로 취급하여 적절한 프로그램을 개발하기 위해서는 수요관리프로그램을 합리적으로 판단할 수 있는 경제적 지표의 수립이 무엇보다 시급하다. 현재 선진국에서는 수요관리대안의 경제성올 평가하기 위한 모델로서 캘리포니아방식이 널리 사용되고 있다. 그 것은 이 평가방식이 무엇보다 이해하기 쉽고 객관적인 기준을 제시하고 있기 때문이다. 그러나 캘리포니아방식에서는 다양한 파생효과나 비계량적인 요소들에 대한 평가는 사실상 고려되지 않고 부하창출의 경우 적용이 힘들며 소비자가 수요에 대한 가격의 탄력성올 갖지 않는다는 등 가정상의 문제점도 지니고있다. 본 연구에서는 기존 평가방식의 한계점을 보완함으로써 보다 개선된 평가방법을 제시하였다. 새로운 방식은 네 가지 관점에 따라 평가하도록 되어있는데, 이들은 각 지역의 특정한 상황에 따라 서로 다르게 적용하는 게 좋으며 각 평가결과들을 비교함으로써 결과들간의 편차를 분석하여 서로 다른 관점에서의 장점을 구할 수 있다. 본 연구에서 제시된 평가방식은 기존의 평가방법을 완전하게 극복한 것이라기 보다는 이를 보완하고 개선시킨 것이기 때문에 향후 실증분석과정을 거치면서 한국적 상황에 적합하도록 지속적으로 발전되어야 한다.

SELECTION OF ACTUATOR COMBINATION IN INTEGRATED CHASSIS CONTROL USING TAGUCHI METHOD

임성진 한국자동차공학회 2018 International journal of automotive technology Vol.19 No.2

This paper presents a method to select the actuator combination in integrated chassis control using Taguchi method. Electronic stability control (ESC), active front and rear steering (AFS/ARS) are used as an actuator, which is needed to generate a control tire force. After computing the control yaw moment in the upper-level controller, it is distributed into the control tire forces, generated by ESC, AFS and ARS in the lower-level controller. In this paper, the weighted pseudo-inverse control allocation (WPCA) with variable weights is used to determine the control tire forces of each actuator. Taguchi method is adopted for sensitivity analysis on variable weights of WPCA in terms of the control performances such as the maneuverability and the lateral stability. For sensitivity analysis, simulation is performed on a vehicle simulation package, CarSim. From sensitivity analysis, the most effective actuator combination is selected.

Surface-Based Parameters of Brain Imaging in Male Patients with Alcohol Use Disorder

임성진,이상구,이정환,김시경,신철진,손정우,주가원,이상익 대한신경정신의학회 2016 PSYCHIATRY INVESTIGATION Vol.13 No.5

ObjectiveaaThe structural alteration of brain shown in patients with alcohol use disorder (AUD) can originate from both alcohol effects and genetic or developmental processes. We compared surface-based parameters of patients with AUD with healthy controls to prove the applicability of surface-based morphometry with head size correction and to determine the areas that were sensitive to brain alteration related to AUD. MethodsaaTwenty-six abstinent male patients with AUD (alcohol group, mean abstinence=13.2 months) and twenty-eight age-matched healthy participants (control group) were recruited from an inpatient mental hospital and community. All participants underwent a 3T MRI scan. Surface-based parameters were determined by using FreeSurfer. ResultsaaEvery surface-based parameter of the alcohol group was lower than the corresponding control group parameter. There were large group differences in the whole brain, grey and white matter volume, and the differences were more prominent after head size correction. Significant group differences were shown in cortical thicknesses in entire brain regions, especially in parietal, temporal and frontal areas. There were no significant group differences in surface areas, but group difference trends in surface areas of the frontal and parietal cortices were shown after head size correction. ConclusionaaMost of the surface-based parameters in alcohol group were altered because of incomplete recovery from chronic alcohol exposure and possibly genetic or developmental factors underlying the risk of AUD. Surface-based morphometry with controlling for head size is useful in comparing the volumetric parameters and the surface area to a lesser extent in alcohol-related brain alteration.

환경·에너지정책의 새로운 모색

임성진 한국정책분석평가학회 1997 政策分析評價學會報 Vol.7 No.1

망간단괴 집광기 주위 해수 유동교란 수치해석

임성진,채용배,정신택,조홍연,이상호 한국해양과학기술원 2014 Ocean and Polar Research Vol.36 No.4

Seawater flow characteristics around a manganese nodule mining device in deep sea were analyzed through numerical investigation. The mining device influences the seawater flow field with complicated velocity distributions, and they are largely dependent on the seawater flow speed, device moving speed, and injection velocity from the collecting part. The flow velocity and turbulent kinetic energy distributions are compared at several positions from the device rear, side, and top, and it is possible to predict the distance from which the mining device affects the seawater flow field through the variation of turbulent kinetic energy. With the operation of the collecting device the turbulent kinetic energy remarkably increases, and it gradually decreases along the seawater flow direction. Turbulent kinetic energy behind the mining system increases with the seawater flow velocity. The transient behavior of nodule particles, which are not collected, is also predicted. This study will be helpful in creating an optimal design for a manganese nodule collecting device that can operate efficiently and which is eco-friendly.

Design of a robust controller for rollover prevention with active suspension and differential braking

임성진 대한기계학회 2012 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.26 No.1

This paper presents a method to design a robust controller for rollover prevention. Several types of controllers for rollover prevention have been proposed in such a way to minimize the lateral acceleration and the roll angle. The rollover prevention capability of these controllers can be enhanced if the controlled vehicle system is robust to the variation of the height of the center of gravity (C.G.) and the speed of the vehicle. With this idea, a robust controller is designed with linear quadratic static output feedback and parameter sensitivity reduction scheme. Differential braking and an active suspension system are adopted as actuators that generate yaw and roll moments,respectively. The proposed method is shown to be effective in preventing rollover through simulations on the nonlinear multi-body dynamic simulation software, CarSim®.