| 摘要 |
PURPOSE:To exercise control so that two traveling objects have the same operation with high accuracy by giving for correction the difference of displacement degree between both traveling objects to the input of one of these two objects so as to minimize the relative displacement of these two traveling objects. CONSTITUTION:The operation command signals given from a signal generator 1 are separated to servo amplifiers 2a and 2b of sides A and B respectively. These amplifiers use the output signals sent from displacement meters 5a and 5b as the feedback signals and supply the signal quantity obtained by subtracting the feedback signal from the input signal to servo valves 3a and 3b respectively. If the displacement XA at the side of a device A is faster than the displacement XB at the side of a device B, a difference signal of XA-XB is supplied to a difference detector 11. While a signal obtained by adding said difference signal to a command signal is supplied to the valve 3b of the device B. Thus the valve 3b works faster than the valve 3a. When both devices A and B have the same displacement degree, the difference XA-XB is set at zero. Then the input to each servo valve is set at zero when both devices move up to their target positions. |
