| 摘要 |
<p>An elevator speed dictation system for controlling the elevator velocity from zero to a maximum velocity and back to zero, illustrated in functional block form in Fig. 1. Velocity profiles over eight regions (Regions 0-7) are provided for zero speed (0), low level phase plane (1), constant jerk to prescribed acceleration (2), prescribed acceleration (3), constant jerk down to constant velocity (4), jerk level after generation of Stop Control Command (SCC; 5), constant speed (6), and phase plane (7), respectively. Velocity profiles for Regions 0-7, including traces of velocity (10), velocity dictated (20), acceleration (30), dictated acceleration (40) and distance to go (50) versus time are graphically illustrated in Fig. 2 & Figs. 4-6 for a long elevator car run, Intermediate II (transition to Region 5 occurs after SSC), Intermediate I (transition occurs from Regions 3 to 5), and a short elevator car run, respectively; while Fig. 7 illustrate velocity and acceleration curves used to find the stopping distance. Fig. 3 provides a flow chart for the transitions between the various regions (0-7) of the profiles.</p> |
