| 摘要 |
PROBLEM TO BE SOLVED: To improve reliability of a feedback control system.SOLUTION: A control unit 10 comprises: a micro controller 100 for setting a duty ratio depending on a target current value of a linear solenoid 7a; an ASIC (Application Specific Integrated Circuit) 200 for supplying power to the linear solenoid 7a on the basis of the set duty ratio; and a current sensor 300 for detecting drive current for the linear solenoid 7a. The micro controller 100 includes a correction unit 110 for correcting a drive current value detected by the current sensor 300, and the ASIC 200 includes a correction unit 206 for correcting the drive current value detected by the current sensor 300. The control unit 10 includes a feedback amount selection unit 112 for selecting, as a feedback amount, either of a drive current value corrected by the correction unit 110 and a drive current value corrected by the correction unit 206; and adjusts the duty ratio on the basis of a deviation from the target current value to duplex a correction system in a feedback control system.SELECTED DRAWING: Figure 2 |
