• Proceedings of the Korean Society of Crop Science Conference
• /
• 2006.04a
• /
• pp.40-54
• /
• 2006

It's not easy to detect the high quality and functional compounds for control quality of food materials. The electronic nose was an instrument, which comprised of an array of electronic chemical sensors with partial specificity and an appropriate pattern recognition system, capable of recognizing simple or complex odors. It can conduct fast analysis and provide simple and straightforward results and is best suited for quality control and process monitoring in the field of functional foods. Numbers of applications of an electronic nose in the functional food industry include discrimination of habitats for medicinal food materials, monitoring storage process, lipid oxidation, and quality control of food and/or processing with principal component analysis, neural network analysis and the electronic nose based on GC-SAW sensor. The electronic nose would be possibly useful for a wide variety of quality control in the functional food and plant cultivation when correlating traditional analytical instrumental data with sensory evaluation results or electronic nose data.

• Journal of Mechanical Science and Technology
• /
• v.16 no.10
• /
• pp.1314-1319
• /
• 2002

A mathematical model and control laws for an Electronic-Vacuum Booster (EVB) for application to vehicle cruise control will be presented. Also this paper includes performance test result of EVB and vehicle cruise control experiments. The pressure difference between the vacuum chamber and the apply chamber is controlled by a PWM-solenoid-valve. Since the pressure at the vacuum chamber is identical to that of the engine intake manifold, the output of the electronic-vacuum booster Is sensitive to engine speed. The performance characteristics of the electronic-vacuum booster have been investigated via computer simulations and vehicle tests. The mathematical model of the electronic-vacuum booster developed in this study and a two-state dynamic engine model have been used in the simulations. It has been shown by simulations and vehicle tests that the EVB-cruise control system can provide a vehicle with good distance control performance in both high speed and low speed stop and go driving situations.

• Transactions of the Korean Society of Automotive Engineers
• /
• v.8 no.4
• /
• pp.100-109
• /
• 2000

In this paper a stepping motor drive electronic ratio control system for a metal belt CVT is suggested. The electronic ratio control system developed in this study is designed to control flow rate which is required to obtain the shift speed and to control the primary actuator pressure to maintain the desired ratio. Considering these control characterstics a fuzzy logic is used for the CVT ratio control. Using the fuzzy logic dynamic models of the ratio control system is investigated and compared with the experimental results. The experimental and simulation results show that the electronic ratio control system developed in this study can be used in CVT system for the active control of the speed ratio.

• Proceedings of the KIPE Conference
• /
• 2006.06a
• /
• pp.163-165
• /
• 2006

Electronic throttle control(ETC) is critical to drive ability, fuel economy and emission performance of present day passenger vehicles. Until now, many automobile engineer and company have been development electronic throttle controller and control algorism, such as adaptive control, sliding control, nonlinear and so on. But there are almost electronic throttle control using DC motor or stepping motor. This paper is the design of an electronic throttle controller and electronic throttle valve control using BLDC motor instead of DC motor.

• 제어로봇시스템학회:학술대회논문집
• /
• 2005.06a
• /
• pp.510-513
• /
• 2005

Due to the asymptotic property, deadbeat control can hardly be applied to the continuous time system control. But some delay element method can deal such a problem. Besides delay element method, well-known digital deadbeat control can be used by the aid of some smoothing elements. In this paper, 2nd order smoothing element is used for the smoothing of the digital deadbeat controller. And this element is argumented to the plant, and so control problem is to control the argumented system digitally. We simulated this control system using Matlab language and finally apply this algorithm to the rotary inverted pendulum system.

• 제어로봇시스템학회:학술대회논문집
• /
• 1994.10a
• /
• pp.416-421
• /
• 1994

Electric Power system is a large scale nonlinear control one. Therefore, nonlinear control is desirable for the stabilizing, and it is thought that to establish an analytical method for optimal control inputs of AVR(automatic voltage regulator) and GOV(governor) is an important subject. In this paper, as a simple case, one-machine infinite-bus electric power model system with GOV is treated under the three kinds of control inputs; (i) fuzzy control input, (ii) linear control input and (iii) no control input. Next, the stability for each case is analyzed, and the three-dimensional stability regions and control responses are evaluated and compared. Finally, it is concluded that the linear control input does not necessarily give a good region and response, and the fuzzy one is better than others.

• Journal of Advanced Marine Engineering and Technology
• /
• v.25 no.5
• /
• pp.1148-1160
• /
• 2001

An electronic control system of the automobile engine for optimal start and idle speed control has been developed. This system employs the microcoputer-based electronic control unit and crank angle sensor for precise control on fuel injection, ignition timing, and idle speed more quickly and accurately at the start and idling. Consequently, the number of misfire can be reduced during been affected by air flow rate, idle quality(roughness), spark timing, fuel injection, water temperature, and load, Thus, this electronic control system strivers to reach the optimal idle operating point, defined the lowest idle speed(fuel economy) and idle quality(roughness), under any engine operating conditions.

• Proceedings of the KIEE Conference
• /
• 2001.07b
• /
• pp.1209-1211
• /
• 2001

Generally, the current controller is located inner the whole controller, so the characteristic of the current controller is important in controlling performance of the upper controller. A current control loop in motor control is designed so that it is 10 times faster than the speed control loop of the upper controller. Thus, the current controller with complex control algorithm is not proper. In this paper, the improved current controller using a conventional digital PI controller and feedforward controller for the brushless BC motor is designed.

• Proceedings of the IEEK Conference
• /
• 2008.06a
• /
• pp.1199-1200
• /
• 2008

In this paper, we suggest a system architecture for korean air traffic control system through investigating a korean ARTS (Automated radar terminal system) and ACC (Area control center) system. We focus on designing a network architecture for supporting both an approaching control and an area control. This paper will be a base for developing korean air traffic control system by ourselves.

• Journal of Power Electronics
• /
• v.16 no.6
• /
• pp.2182-2191
• /
• 2016

This study proposes a novel frame anti-vibration controller for position sensorless PMSM drive application. This controller is called specific component reduction controller (SCRC). SCRC can function without an accelerometer and can achieve speed variable control. This study mainly comprises the following phases. First, the position sensorless control method will be provided. Second, the frame vibration model and load torque ripple will be shown. Third, SCRC will be discussed and its stability will be analyzed. Finally, experimental results show that SCRC can achieve speed variable anti-vibration control and compensate target frequency torque ripple.