2002년도 대한토목학회 학술발표회 Semi-active Fuzzy control for Seismic Response Reduction Using MR Damper K-M Choi1), H-J Jung1) J-H Lee2) and I-W Lee1) 1) Department of Civil Engineering, KAIST 2) Department of Civil Engineering, Kyungil Univ.
Objective Semi-active control strategy - bounded input and bounded output stability - small energy requirement - not only the reliability of passive control but also the adaptability of fully active control Fuzzy control - ability of producing continuous control signal - possibility of applying non-linear problems - no need handle the tedious mathematical models of the control body
Fuzzy control Input Values (state variables) Fuzzification 입력을 퍼지 제어시스템 내에서 정의되는 퍼지 변수들에 대한 확실성의 정도로 나타내는 퍼지값으로 변환 퍼지규칙표에 따라 퍼지화과정을 통하여 결정되는 입력퍼지값들을 출력에 해당하는 퍼지값으로 변환시켜주는 역할 Fuzzification Fuzzy Inference 이러한 입력에 대한 퍼지값으로의 사상관계를 나타내는 것이 소속함수 퍼지 출력값을 물리적인 의미를 갖는 출력정보로 역환산하는 과정 Defuzzification Output Values
Semi-active Fuzzy Control System MR Damper Spencer et al. (1997) MR Damper으로의 입력 전압
Numerical Example Input Earthquake Example Structure ;Dyke et al. (1996) Input Earthquake El-Centro (0.348 g)
Input Membership Function Output Membership Function Numerical Example Input Membership Function Output Membership Function Fuzzy Rule
Numerical Example 3층 변위 3층 가속도 MR Damper으로의 입력 전압
Conclusions Semi-active fuzzy controller using MR damper The proposed semi-active fuzzy controller using MR damper is quite effective to reduce seismic responses. Only one controller produces directly the desired command voltage to produce the desired force using fuzzy rule inference. Semi-active fuzzy controller using MR damper