| 摘要 |
<p>PURPOSE:To correct the target speed value with high precision without resorting to a pulse encoder and a pulse counter by calculating the actual speed on the basis of the time while a car has run for a certain specified distance, and thereupon making speed control in conjunction with the speed correction value calculated from the target speed and actual speed. CONSTITUTION:A car 3 runs at the target speed V, and the number of correcting occasions (n) shall be 0 as no speed correction has been made yet. When the car 3 passes a gage 10, a photo-sensor PS senses it and is turned on t actuate clocking with a timer 62. When thereafter the photo-sensor is again turned on, the clocking is ended, and the passage time (t) of the gage 10 for a set reference distance L is determined. Then a speed calculating part 63 calculates the car 3 actual speed V' using the formula V'=L/t. Then the number of speed correcting occasions n becomes 1, and calculation is made through the first time speed correction value Kn+Kn-1.f(V,V'),K0=1 from the speeds V and V'. A speed correcting part 64 gives the speed command voltage Vn=Kn.V0 to a drive control part 60 to serve drive control of a motor 20, and thus the car 3 is controlled to the speed V.</p> |
