| 摘要 |
A method for initializing an actuator valve (12) and controlling the valve (12) using current command control (100) or voltage control including an estimate of back emf (200). A series of low voltage pulses (304) is applied to one of the solenoid coils (20, 24) in the actuator valve (12) according to the natural frequency of the armature (16) movement in the actuator valve (12). The current command control system calculates a desired force (Fem) and divides the force into closing and opening components Fem-c, Fem-o, for calculating a desired current command Ic_cmd, Io_cmd, for each of the solenoid coils. The back emf control system divides the current signal into close and open components, Io, Ic, that are individually processed and combined with a back emf estimate for each of the open and close solenoids, ec, eo. The result is a desired voltage command, vc*, vo*, for each of the solenoids that is communicated to the power stage (34) in order to operate the armature (16) as desired.
|
