• 한국정보통신학회논문지
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• 제4권2호
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• pp.487-492
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• 2000

본 논문은 유도전동기 간접 벡터 제어시 회전자 시정수 변동에 대한 슬립보상 방법을 제안하였다. 회전자 시정수가 변동하면 고정자 전류의 자속 및 토크 성분의 상호 간섭이 발생하여 벡터제어가 불가능하고 성능이 저하하게 된다. 이를 해결하기 위하여 본 논문에서는 실제 자속 성분과 기준 자속 성분을 비교하여 위상차 없이 자속 성분을 기준 좌표의 q축에 일치시키고 PI 제어기를 이용하여 슬립을 보상하는 방법을 제시하였다. 제안된 방법을 이용하면 유도전동기의 회전자 저항 변동시 q축 자속 성분이 0이 되어 적정 슬립이 유지되고 정확한 벡터제어가 실현된다. 제안된 알고리즘의 타당성을 컴퓨터 시뮬레이션과 실험을 통하여 검증하였다.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1999년도 추계학술대회 논문집 학회본부 A
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• pp.392-394
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• 1999

In this paper, the vector of induction motor using as sensorless is described. Controlling through the estimation of input by slip, the speed controller wit control loops of torque control constant speed operation by the feedback of slip is composed.

• 전력전자학회:학술대회논문집
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• 전력전자학회 2008년도 추계학술대회 논문집
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• pp.166-168
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• 2008

This paper presents a vector control of Linear Induction Motor(LIM) based on a slip frequency control. And a Linear Induction Motor modeling included the end effect using circuit and equation method is also presented. We demonstrated through simulation the improvements achieved by the proposed scheme.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2002년도 하계학술대회 논문집 B
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• pp.1303-1305
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• 2002

In this study, We proposed high efficiency wind power generator system for induction generator used SVPWM swiching inverter. First, We suggest Equivalient Circuit for Ind Generator, it's characteristics equation, and equation of slip. In addition, we suggest Pick Traction Slip control methods. adapted variable power system. We study simulation result fo suggested system and output power by slip e and we identify SVPWM of suitable wind p system by comparison between SPWM and SVPW Consequently, we show that the control result variable wind power is suitable.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2004년도 춘계학술대회 논문집
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• pp.626-631
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• 2004

In electric motor coaches, the rolling stocks move by the adhesive effort between rail and driving wheel. Generally, the adhesive effort is defined by the function of both the weight of electric motor coach and the adhesive effort between rails and driving wheel. The characteristics of adhesive effort is strongly affected by the conditions between rails and driving wheel. When the adhesive effort decreases suddenly, the electric motor coach has slip phenomena. This paper proposes a re-adhesion control algorithm which uses the maximum adhesive effort by instantaneous estimation of adhesion force using load torque disturbance observer. Based on this estimated adhesive effort, the re-adhesion control is performed to obtain the maximum transfer of the tractive effort.

• 한국전문물리치료학회지
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• 제10권1호
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• pp.97-108
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• 2003

Slipping during various kinds of movement often leads to potentially dangerous incidents of falling. The purpose of this paper was to review some of the research performed in the field including such topics as rating scales for balance, kinematics and kinetics of slipping, adaptation to slippery conditions, postural and balance control, and protective movement during falling. Controlling slipping and fall injuries requires a multifaceted approach. Environmental conditions (state of floor surface, tidiness, lighting, etc), work task (walking, carrying, pushing, lifting, etc), and human behavior (anticipation of hazards, adaptation to risks, risk taking, etc) must be accounted for in the assessment of slip and fall-related risks. Future directions of research must deal with modeling of basic tribophysical, biomechanical, and postural control process involved in slipping and falling.

• 산업기술연구
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• 제16권
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• pp.71-81
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• 1996

This paper discusses a physiological approach motivated by the study of human hands for robot hand force control. It begins with an analysis of the human's grasping behavior to see how humans determine the grasp forces. The human controls the grasp force by sensing the friction force, that is, the weight of the object which is felt on his hand, but when slip is detected by sensing skin acceleration, the grasp force becomes much greater than the minimum force required for grasping by adding the force which is proportional to the acceleration. And two methods that can predict when and how fingers will slip upon a grasped object are considered. To emulate the human's capabilities, we propose a method for determination of as grasp force, which uses the change in the friction force. Experimental results show that the proposed method can be applied to control of robot hands to grasp objects of arbitrary weight stably without skin-like slip sensors.

• 전력전자학회:학술대회논문집
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• 전력전자학회 2002년도 전력전자학술대회 논문집
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• pp.69-72
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• 2002

In this study, We proposed high efficiency wind power generator system for induction generator used SVPWM swiching inverter. First, We propose Equivalient Circuit for Induction Generator, it's characteristics equation, and power equation of slip. In addition, we suggest Pick Power Traction Slip control methods, adapted variable wind power system. We study simulation result for the proposed system and output power by slip effect. and we identify SVPWM of suitable wind power system by comparison between SPWM and SVPWM Consequently, we show that the system control result from variable wind power is suitable.

• 자동차안전학회지
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• 제13권3호
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• pp.6-12
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• 2021

This paper presents a lateral stability control for rear wheel drive (RWD) vehicles using electronic limited slip differentials (eLSD). The proposed eLSD controller is designed to increase the understeer characteristic by transferring torque from the outside to inside wheel. The proposed algorithm is devised to improve the lateral responses at the steady state and transient cornering. In the steady state response, the proposed algorithm can extend the region of linear cornering response and can increase the maximum limit of available lateral acceleration. In the transient response, the proposed controller can reduce the yaw rate overshoot by increasing the understeer characteristic. The proposed algorithm has been investigated via computer simulations. In the simulation results, the performance of the proposed controller is compared with uncontrolled cases. The simulation results show that the proposed algorithm can improve the vehicle lateral stability and handling performance.

• 전력전자학회논문지
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• 제9권6호
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• pp.635-642
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• 2004

본 논문에서는 최대 견인력 제어를 위해서 부하토크외란관측기와 속도센서리스 백터제어를 이용하여 점착력 계수를 추정하고 추정한 점착력 계수의 미분치를 PI 토크 제어하는 Anti-slip제어를 제안한다. 점착력 계수를 추정하기 위해서는 전압, 전류값 뿐만 아니라 자속이나 속도정보가 필요하다. 따라서 전동기의 회전속도를 정확하게 검출 할 수 있는 속도센서가 필요하게 된다. 그러나 속도검출을 위해 속도센서를 부착하는 것은 여러 가지 면에서 단점을 가지고 있다. 이러한 문제점을 해결하기 위하여 속도센서 없는 센서리스 구동방식에 의한 부하토크외란관측기를 설계하여, 점착력 계수를 추정한다. 이와같은 제어 알고리즘을 구현하기 위하여 1C1M 철도모의장치를 이용하여 제안된 알고리즘을 실험을 통하여 확인하였다.