No abstract

No abstract

No abstract

The Centrifuge Rotor (CR) is a large life science experiment facility which will be installed in the International Space Station (ISS). It will provide artificial gravity of 2g or less by rotating up to 4 science habitats, and it will be the first such machinery to be used in space. To prevent vibration disturbance exchanges between the CR and the 155, a soft 5 dof vibration isolation mechanism is used which cannot support the CR weight on the ground. Therefore, the CR onorbit performance must be predicted by integrated analysis which must model all of the equipment including sensors, actuators, flexible structure, gyroscopic effects, and controllers. Here, we introduce the CR mechatronics, a verification procedure, and examples of the application of the integrated analysis which is based on the general-purpose mechanism analysis software ADAMS.

In the small-scale and steep channels for irrigation or drainage on the mountainous areas, bottom intakes or bottom divisions are safer and more economical than other types of diverging facility. The hydraulic characteristic of that kind of structure has not been made clear, even though the detail of it would be necessary for reasonable design. In this study, the flow around a bottom intake is analyzed experimentally, and also theoretically as potential flow using the hodograph and conformal mapping. In the analysis, the position of the stagnation point that appears on the division side of the diverging corner is considered to be an important factor for the determination of diversion discharge. As a result, a method to estimate the diversion rate is developed.