In automated control-valve applications, large, expensive, and cumbersome actuators (solenoids, motors, or cylinders) often dwarf the actual valves that they control. By splitting the upstream pressure, the BP valve conquers an old problem: the need for large operating forces. Instead, counterbalanced pistons, linked to a common shaft, roll open with relative ease, reducing valve size, mass, and power requirements.
Three components at the heart of the concept include a reciprocating cylindrical seat, a reciprocating solid plug, and a fixed-axis rotary shaft. A seated plug presents a solid face to block flow. When unseated, fluid flows around the plug and through the seat cylinder. Although fluid pressure pushes these two elements in a downstream direction, rotary-shaft linkage prevents movement. Because the pressure-induced forces on the seat and plug act on the shaft in opposite directions, they balance each other. Consequently, a slight torque applied to the shaft moves the plug and seat cylinder in opposite directions to each other, even with very high upstream pressures.
Some humanoid walking robots are also good at running, balancing, and coordinated movements in group settings. Several of our sports robots have won regional or worldwide acclaim in the RoboCup soccer World Cup, or FIRST Robotics competitions. Others include the world's first hockey-playing robot and a trash-talking Scrabble player.
A recent example of a major CAE revamp is MSC Apex, released last month by MSC Software Corp. In a discussion with Design News, MSC executives noted that its next-generation platform is designed to substantially reduce CAE modeling and process time, “in some cases from weeks down to hours.”
The Thames Deckway would run for eight miles close to the river’s edge, rising and falling slightly with the tidal cycle. It will generate its own energy from a series of devices that will line the pathway and use a combination of sources to make the path self-sustaining.
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