| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a speed control device which, irrespective of the operation speed of a moving body, eliminates the effect of errors in floor landing position arising from a time delay of a control system and thereby improves the accuracy of positioning at a desired floor landing position. <P>SOLUTION: A value (L<SP POS="POST">*</SP>-L<SB POS="POST">d</SB>) derived from a movement distance L<SP POS="POST">*</SP>preset by a movement distance setter 26 by subtracting therefrom a movement distance L<SB POS="POST">d</SB>calculated by a delay time movement distance arithmetic unit 31 is input as a target value for movement distance to a creepless operation arithmetic unit 33. In the creepless operation arithmetic unit 33, an initial value of acceleration α(0) and a change rate of acceleration j at start of creepless operation are calculated on the basis of a motor speed command value N<SP POS="POST">*</SP>at the time a position detection signal is input from a potion detector 12 and the movement distance target value (L<SP POS="POST">*</SP>-L<SB POS="POST">d</SB>), and an acceleration command α<SP POS="POST">*</SP>output by an acceleration command generator 23 is rewritten by an acceleration command α(0) calculated by the creepless operation arithmetic unit 33. In a speed command generator 24, a moment by moment speed command value N<SP POS="POST">*</SP>obtained on the basis of the acceleration command α(0) is output, thereby causing a cage 7 to stop at a desired floor landing position C. <P>COPYRIGHT: (C)2013,JPO&INPIT |
