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PD and fuzzy logic control for earthquake resilient structures
Author(s) -
Alvarez Pedro,
McElwain Brittany,
Thesing Laura,
Edalath Sanooj,
Kukreti Anant,
Cohen Kelly
Publication year - 2014
Publication title -
computer applications in engineering education
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.478
H-Index - 29
eISSN - 1099-0542
pISSN - 1061-3773
DOI - 10.1002/cae.20540
Subject(s) - tuned mass damper , earthquake shaking table , shaker , damper , vibration control , earthquake engineering , engineering , fuzzy logic , structural engineering , vibration , control theory (sociology) , computer science , matlab , control engineering , control (management) , physics , quantum mechanics , artificial intelligence , operating system
Abstract This research was conducted within the framework of a National Science Foundation sponsored summer Research Experience for Undergraduate (REU) students. This research considers small‐scale and mathematical models of simple one‐story structures that are subjected to free and base‐motion excitations and installed with and without passive damping devices to gain an understanding of their dynamic behavior while reviewing active and semi‐active damping means being applied and researched today. Using computer programming and numerical methods, the goal is to understand and counteract catastrophic disasters to structures caused by earthquakes. The research is broken down into a number of MATLAB simulations and experiments in order to understand basic dynamic and control features required to design earthquake resilient buildings. These experiments include free vibration experiments to test for the stiffness of columns for different heights and to test for the natural frequency and damping ratio of a one‐story structure under different mass loads. Active PD control was then applied to an experimental system experiencing accelerations attributed to the Northridge 1994, Kobe 1995, El Centro 1940, and Mendocino 1992 earthquakes. Robustness comparisons were made between (1) P control; (2) D control; and (3) PD control for the above earthquake inputs to the shaker. A fuzzy logic controller was developed to effectively control transient vibrations. The uniqueness of this control concept is that the fuzzy control continuously varies the damping characteristics of a semi‐active tuned mass damper (TMD). It was concluded that a fuzzy logic based TMD was more effective than a regular passive TMD, by providing half the settling times. © 2012 Wiley Periodicals, Inc. Comput Appl Eng Educ 22: 142–152, 2014