Control of Pressure-Comfort and Motion in Mega-Rise Elevators

Elevators are becoming faster in order to increase peak load capacity in mega rise buildings. However, minimum flight time in long descents will be determined by ear pressure comfort constraints. As a consequence, the motion control of high speed elevators will be need to contain logic to slow the car flight in some instances in order to maintain pressure-comfort with less impact on flight times. The elevator will be able to move most quickly with active pressure control, less quickly with two-speed passive control, and least quickly with conventional motion dictation.