http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
LMI를 이용한 불확실시스템에 대한 섭동의 상위경계치해석
김찬용(C. Y. Kim),윤소남(S. Yun),최봉열(B. Y. Choi),박평원(P. W. Park) 한국동력기계공학회 2004 한국동력기계공학회 학술대회 논문집 Vol.- No.-
In this paper, we deal with the upper boundary analysis of perturbation in an uncertain system using LMI. Existing papers used a pole assignment method that locates pole in the specified region to obtain expected performance and the optimal solution of the upper boundary for stable region was got by Lyapunov method. In this study, the method for the upper boundary analysis of perturbation in an uncertain system using LMI for get a stable system characteristics was proposed. And, it was confirmed that the proposed LMI method is more excellent than the Lyapunov method.
윤소남(S. N. Yun),김찬용(C. Y. Kim),박중호(J. H. Park),서우석(W. S. Seo) 한국동력기계공학회 2007 한국동력기계공학회 학술대회 논문집 Vol.- No.-
In this study, a new control mechanism for the proportional pressure control which is accomplished by electro-pneumatic regulator using two PZT actuators was studied instead of the conventional type solenoid actuator. Also, new control algorithms, such as PID-PWM control method and saturation function control method, were attempted for the hysteresis characteristics improvement and the effect of the saturation function, κ, was investigated. PZT actuator for the pressure control was fabricated and experimented instead of the conventional type solenoid actuator. Experiments for ON/OFF control and PID-PWM control of the elector-pneumatic regulator were operated under the input condition of 0.4[㎫] and. it was confirmed that this mechanism has a good control characteristics to the response sensitivity and hysteresis.
윤소남(S. Yun),김찬용(C. Y. Kim),박중호(J. H. Park),정용현(Y. H. Jung),김고도(G. D. Kim) 한국동력기계공학회 2005 한국동력기계공학회 학술대회 논문집 Vol.- No.-
In the paper, low pressure proportional solenoid actuator which is used for fuel control of common rail system of diesel vehicle was studied. Steady state characteristics of the solenoid actuator for electro-hydraulic proportional valve determined by the shape of control cone are analyzed using finite element method and it is confirmed that the proportional solenoid actuator has a constant attraction force in the control region independently on the stroke position. Based on these analysis, an optimized solenoid actuator model and valve assembly for diesel fuel control was suggested and manufactured. Also, the performance of this model was evaluated through the experiments.
윤소남(S. Yun),김찬용(C. Y. Kim),이경우(K. W. Lee),소형종(H. J. So),김홍희(H. H. Kim) 한국동력기계공학회 2004 한국동력기계공학회 학술대회 논문집 Vol.- No.-
Piezoelectric actuator with many advantages such as high stiffness, fast-frequency response, low energy consumption have been used in many applications that control the fluid and require precise positioning control in recent years. In this paper, the study for improvement of PZT actuator force and response time of microvalve with PZT actuator was accomplished. In order to achieve this object, prototype PZT actuator and microvalve were suggested and evaluated through the experiments.
윤소남(S. Yun),김찬용(C. Y. Kim),박평원(P. Y. Park),이충국(C. K. Lee) 한국동력기계공학회 2005 한국동력기계공학회 학술대회 논문집 Vol.- No.-
The purpose of this paper is to improve the hysteresis characteristics of a stack type piezoelectric actuator using system identification and tracking control. Recently, several printing methods that cost less and are faster than previous semiconductor processes have been developed for the production of electric paper and RFID. The system proposed in this study prints by spraying the molten metal, and consists of a nozzle, heating furnace, operating actuator, and an XYZ 3-axis stage, As an operating system, the piezoelectric(PZT) method has very valuable uses. However, the PZT actuator has a very big hysteresis characteristic due to the ferroelectric characteristics of the PZT element. This causes problems in the system position control characteristics and deteriorates the performance of the system. In this study, an investigation was conducted to improve the hysteresis characteristics of the PZT actuator that has an output displacement for the input voltage. The study proposed a inverse hysteresis model, a mathematic modeling method that can express the geometric relationship between voltage and displacement, in order to reduce the hysteresis of the PZT actuator. In addition, system identification and PID control methods were examined. Also, it was confirmed that the proposed control strategy gives good tracking performance.