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[차량운동성능] 퍼지 제어기를 사용한 전자식 차량 제동력 제어에 관한 연구
김승대(Seungdae Kim),김남헌(Namheon Kim),김훈모(Hunmo Kim) 한국자동차공학회 1999 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1999 No.11_2
In a brake systems a proportioning valve which distributes the brake pressure at each wheel cylinder for anti-locking of rear wheels is closely related with the safety of vehicles. But, it is impossible for a normal proportioning valve to change the cut-in-pressure and the slop of valve in order to reduce a loss of brake efficiency according as a weight of vehicle become heavily. So. In this paper we describe a electronic brake pressure distribution system using fuzzy controller in order to improve the brake efficiency of vehicle. The object of electronic brake pressure distribution system is to change a cut-in pressure and valve slop of proportioning valve in order to have better good performance of brake system more than that of the previous system.
[동력전달계부문] 기계식 차량 제동력 배분시스템과 퍼지 제어 전자식 차량 제동력 배분 시스템의 비교에 관한 연구
김승대(Seungdae Kim),김남헌(Namehon Kim),김훈모(Hunmo Kim) 한국자동차공학회 2000 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
In the brake systems a proportioning valve which reduces the brake pressure at each wheel cylinder for anti-locking of rear w~1eels is closely related with the safety of vehicles. But, it is impossible for a present proportioning valve to exactly control brake pressure because mechanically it is an open loop control system. So. In this paper we describe a electronic brake pressure distribution system using a fuzzy controller in order to exactly control brake pressure using a close loop control system. The object of electronic brake pressure distribution system is to change a cut-in pressure and a valve slop of proportioning valve in order to have better good performance of brake system more than that of the previous system.
[동력전달계부문] 직접 적응식 퍼지 제어기를 이용한 전자식 차량 제동력 배분시스템의 안정성에 관한 연구
김남헌(Namheon Kim),황교일(Kyoil Hwang),김훈모(Hunmo Kim) 한국자동차공학회 2000 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
In the brake systems, it is important to reduce the rear brake pressure' in order to secure the safety of vehicle in braking. So, there were some researches that reduced and controlled the rear brake pressure exactly like a L.S.P.V and a E.L.S.P.V. However, the previous researches have some weakness: the L.S.P.V is a mechanical system, the cost of E.L.S.P.V is high. Additonally, when a noise or disturbance is applied to them, they don't take the effect of noise or disturbance into account. Hence, the efficiency of them is low and the safety of vehicle is not confirmed. So, in this paper we develop a new economical pressure modulator that exactly control brake pressure and confirm the safety of vehicle in any case using a direct adaptive fuzzy controller.
Adaptive Fuzzy 제어기를 이용한 Embedded 시스템 기반의 기능성 고분자 구동체 다중제어에 관한 연구
김태형(Tae Hyoung Kim),황교일(Kyoil Hwang),김훈모(Hunmo Kim),최혁렬(Hyoukryeol Choi),전재욱(Jea Wook Jeon),남재도(Jea Do Nam) 대한기계학회 2002 대한기계학회 춘추학술대회 Vol.2002 No.5
In case of environment requiring safety such as human body and requiring flexible shape. a conventional mechanical. actuator system does not satisfy requirements. Therefore. in order to solve these problems, a research of various smart material such as EAP(Electro Active Polymer), EAC (Electro Active Ceramic) and SMA (Shape Memory Alloy) is in progress. Recently, the highest preferring material among various smart material is EP (Electrostictive Polymer), because it has very fast response time, poerful force and large displacement. The previous researches have been studied properties of polymer and simple control, but present researches arc studied a polymer actuator. An EP (Electostrictive Polymer) actuator has properties which change variably as shape and environmental condition. Therefore, in order to coincide with a user's purpose, it is. important not only to decide a shape of actuator and mechanical design but also to investigate a efficient controller. In this paper, we constructed the control logic with an adaptive fuzzy algorithm which depends on the physical properties of EP that has a dielectric constant depending on time. It caused for a sub-actuator to operate at the same time that a sub-actuator system operation increase with a functional improvement and control efficiency improvement in each actuator. hence it becomes very important to manage it effectively and to control the sub-system which is operated effectively. <br/> There is a limitation on the management of Main-host system which has multiple sub-system. hence it brings out the: Multi-Vehicle Control process that disperse the task efficiently. Controlling the multi-dispersion system efficiently, it needs the research of Main-host system's scheduling, data interchange between sub-actuators, data interchange between Main-host system and sub-actuator system, and data communication process. Therefore in this papers, we compared the fuzzy controller with the adaptive fuzzy controller. also. we applied the scheduling method for efficient multi-control in EP Actuator and the algorithm with interchanging data, protocol design.