| Summary: | 碩士 === 國立高雄應用科技大學 === 土木工程與防災科技研究所 === 94 === Recently the rapid and mass transit system (RMT) has become the major transportation tool for daily use and its safety and comfort is very important to people. The oscillation of cars of RMT can be described in forward/backward translation, vertical translation, pitching and rolling modes. This thesis is proposed to study the application of passive and active tuned mass dampers (TMD) to the cars of RMT subjected to free vibrations and various forced vibrations using the typical single-car rigid model, wherein optimal and fuzzy control strategies are involved in the active control synthesis. Further, the dynamic responses of rolling mode of uncontrolled and controlled cars subjected to lateral winds are studied. Then, three-car rigid-body model is employed to investigate the different arrangement of cars of a train. The equations of motion of rigid-body models for single-car and three-cars cases are derived and then expressed in state space form. The time-domain responses of the vehicle dynamic systems are solved using Runge-Kutta scheme. In passive control various parameters of TMD would be investigated. Both optimal control and fuzzy control schemes would be adopted in the active control synthesis. It is concluded that adequate selection of TMD parameters, weighting matrices in optimal control and membership functions and rule banks the oscillation of cars of RMT would be alleviated by the use of passive and/or active TMD. It is also found that active control is better than passive one.
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