Stage division of elevator operation state curve.
|Stage||Time required||Stage description|
|1||Acceleration increases to a = − amax|
|2||Acceleration remains −amax constant|
|3||Acceleration decreases to zero, v = − vmax|
|4||Speed vmax is unchanged|
|5||Acceleration increases to a = amax|
|6||Acceleration remains amax constant|
|7||Acceleration decreases to zero,v = 0|
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