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ADAMS를 이용한 리튬전지 고속 자동 블리스터 포장기의 가상시제품 개발
정상화,이경형,차경래,송석,최석환,신병수 朝鮮大學校 機械技術硏究所 2003 機械技術硏究 Vol.6 No.2
The blister packaging is applied t o many fields in recent years for i t s merit t h a t it enable consumer t o see t h e products The most of battery packaging a r e blister type. However, t h e lithium battery is dealt with very carefully i n packaging because of i t s explosion. The existing packaging machines for lithium battery are mostly adapted alkaline packaging machine and their capacity is very inferior to okher process. either. In this paper, the virtual prototype of the automatic blister packaging system for lithium battery which has new mechanism and 24OEAjmin capacity ' is developed and its performance is evaluated.
정상화,이상희,김재상,박진완,임성빈 朝鮮大學校 機械技術硏究所 2007 機械技術硏究 Vol.10 No.2
Roll forming process is one of the most widely used processes in the world for forming metals. It can manufacture goods of the uniform cross section throughout the continuous processing. However, analysis of process is very difficult because of the inherent complexity of the process. For this reason, the computer analysis methods such as the FEM(Finite Element Method) and the FDM(Finite Difference Method) are frequently used in roll forming design. In this paper, the under rail composed of upper member, center member and lower member is modeled. Also the flower pattern of the upper member is designed and the roll forming process is simulated. The upper member is designed using constant arc length forming method and constant radius forming method for excellent design. The cold rolled carbon steel sheet(SCP-l) is used in this simulation, and a flow stress equation is set up through the tensile test. Each types are simulated and compared with the longitudinal strain using SHAPE-RF software. In addition. the numerical magnitude of camber and bow is predicted from the results of the simulation.
H-브릿지 회로를 이용한 형상기억합금 액츄에이터의 온도제어
정상화,임성빈 한국공작기계학회 2008 한국공작기계학회 춘계학술대회논문집 Vol.2008 No.-
In recent years, one of the main obstacles to develop an anthropomorphic robot is the construction of a mechanism that can perform motion with multiple degrees of freedom . As robot industry is focused on humanoid robot, the smart materials are used as artificial muscle actuator of humanoid robot that enables a robot to move dexterously and versatilely. Using shape memory alloy actuators provides an interesting alternative to conventional actuator driving. Their advantages create a means drastically to reduce the size, weight, and complexity of robotic systems. SMA actuators also possess an extremely high force-to-weight ratio. However, characteristics of SMA wire are hysteresis and stress dependance. In this paper, temperature control of shape memory alloy actuator using H-bridge circuit is studied. The segmental mechanism is applied for control of SMA wire. H-bridge circuit changes the flow direction of the current in order to carry out cooling and heating in same side of TEM, simultaneously. To reduce the latency time of SMA wire, the hysteresis loop control method is used.
정상화,이상희 한국공작기계학회 2007 한국공작기계학회 추계학술대회논문집 Vol.2007 No.-
Roll forming process is one of the most widely used processes in the world for forming metals. It can manufacture goods of the uniform cross section throughout the continuous processing. However, analysis of process is very difficult because of the inherent complexity of the process. For this reason, the computer analysis methods such as the FEM(Finite Element Method) and the FDM(Finite Difference Method) are frequently used in roll forming design. In this paper, the under rail composed of upper member, center member and lower member is modeled. Also the flower pattern of the upper member is designed and the roll forming process is simulated. The upper member is designed using constant arc length forming method and constant radius forming method for excellent design. The cold rolled carbon steel sheet(SCP-1) is used in this simulation, and a flow stress equation is set up through the tensile test. Each types are simulated and compared with the longitudinal strain using SHAPE-RF software. In addition, the numerical magnitude of camber and bow are predicted from the results of the simulation.
구간 분할 제어를 이용한 형상기억합금 와이어의 온도제어에 관한 연구
정상화,김주환,김태호,서호진,박진완 朝鮮大學校 機械技術硏究所 2007 機械技術硏究 Vol.10 No.1
The key technology of robot is the design of the actuator. Particularly breakthroughs of power-to-weight ratio or energy-density III actuator technology have significant impacts upon the design and the control of robotic systems. To realize the anthropomorphic motion, artificial muscles such as shape memory alloy(SMA) and electro active polymer(EAP) are used. These actuators have the higher energy density than the electromechanical actuators such as the electric motor. The EAP has the property of good elasticity, but it is difficult to get the required power. The SMA has the good power density and simple structure, but the control scheme of the actuator is difficult. In this paper, temperature control of SMA wire using segment control is studied. The SMA wire is segmented by thermo-electric module(TEM). To supply constant currents in TEMs, MOSFET is used. Hysteresis in one segment of SMA wire is evaluated. The force and displacement of SMA wire are measured according to the number of segment. The program to control the temperature of TEM is developed by using LabVIEW software.
구간분할 바이너리 제어를 이용한 형상기억합금 와이어의 성능평가
정상화,김주환,김광호,이상희,신상문 한국공작기계학회 2006 한국공작기계학회 추계학술대회논문집 Vol.2006 No.-
The technique of the human being created the robot. Recently, intelligent robot is developed to improve human being life. Intelligent robot is an all aggregate of human technology. The intelligent robot is possible to be aware of surroundings and react quickly using AI. Actuator of the robot is an important technology. One of the possible actuator is to drive by shape memory alloy. Shape memory alloy has excellent corrosion and heat resistance. It is used to a lot of mechanical field. But, there are bad performance of repeatibility and control scheme of SMA is difficult. In this paper, performance of shape memory alloy wire using segment control is evaluated. The wire using as thermo-electric module is segmented. The mosfet circuit is used for composing the control system. The force and displacement are measured according to the number of segment. Hysteresis characteristics of the relationship of temperature between displacement are confirmed.
원형 플레이트 형태에 따른 초음파 부상 장치의 진동특성에 관한 연구
정상화,최석봉,차경래,김현욱,김광호,박준호 한국공작기계학회 2005 한국공작기계학회 춘계학술대회논문집 Vol.2005 No.-
In the semiconductor and optical industry the non-contact transportation is required for reducing the damages. The ultrasonic levitation is the solution of the problem. In this paper, the ultrasonic levitation system and 3 disk-type stator for levitation various object are proposed. The vibration modes of disks are analyzed with FEM and designed with the analysis results. The 3D vibration profiles of the disks are measured by Laser scanning vibrometer for verifying the vibration characteristics of the system. The amplitudes of the disks and the levitation heights of object are measured for evaluating the performance.
CNC 공작기계에서의 자동공구 보정시스템의 평가에 관한 연구
정상화,신현성,김현욱 한국공작기계학회 2001 한국공작기계학회 춘계학술대회논문집 Vol.2001 No.-
The tool wear that is developed by long-term machining in mold manufacturing with machining center makes a severe influence to the accuracy and the surface roughness. In this reason, tool-wear supervising system which has guaranteed high accuracy and high speed is needed to improve the measurement quality. Touching probe and touch sensor are widely used to measure the tool profile at on-machine measurement. In this paper, using the newly developed electric touch point measuring system, the Automatic Tool Compensation System is developed to correct the error of tool diameter resulted from the wear, and the operating method of this system is also provided.
정상화,최석봉,차경래,김광호,박준호,이경형 한국공작기계학회 2004 한국공작기계학회 춘계학술대회논문집 Vol.2004 No.-
In the semiconductor and the optical industry a new transport system which can replace the conventional sliding system is required. These systems are driven by magnetic field and conveyer belt. The magnetic field damages semiconductor and contact force scratches the optical lens. The ultrasonic wave driven system can solve these problem. In this paper, the relationship of transporting speed according to the change of flexural beam shape and the effect of transporting speed according to the change of weight and amplification voltage are verified. The vibration behavior of flexural beam in the ultrasonic transport system is experimented using Laser Scanning Vibrometer.