When elevators travel at high speed, horizontal vibrations of the car tend to occur due to guide rail deformations, deteriorating ride comfort. Therefore, several active control systems have been developed to reduce these vibrations. These systems consist of six actuators, which independently move the guide rollers. To reduce costs and installation time, it is necessary to develop a system with a minimum number of actuators and a simplified controller. We developed a system with only three actuators. The controller incorporates an H-infinity control design method for maintaining stability of the system when there is a change in load. Furthermore, from a practical point of view, it is important to reduce the order of the controller so that the time for on-site parameter tuning can be reduced. Therefore, we reduced the H-infinity controller to a P controller. We demonstrated that the maximum amplitude of vibrations of a car with active control system can be reduced to almost half the vibration amplitude without control.
This paper describes a new elevator system applied for Intermediate-Floors Base Seismic Isolation Buildings, to replace the existing system with the ultimate aim to reduce the installation and construction costs. Features of the new elevator system such as high tensioned steel guide rail, new entrance structure, new type of guide rail reinforcements called rail backing and new control systems are introduced in the paper. Details of a new design method to determine the stiffness and the length of the rail backing is also listed.
In the ul杜a−high − speed e里 evato ち 血 ere is a possibi 亘 ity that the vibration of 出e car is increased by 出e fluid 童 brce generated when the car and 血e counter weight pass each otheL Wind pressure gcnelated dしtring passing , bccause it incrcases in propon lon to approximately the square of the eleva 紋) r specds , has bccome an important issue in the ultra − high − spccd elevators . This pape: for tiie counterweight , to verify the effect of the fluid force reduction by providing aClditional and opening of the rectifyillg coven In addition , as a result of fluid analysis and physical testing , we obtained the prospect that fluid force can be reduced about 30 percent of the time passing .
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