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Flux observer for spool displacement sensing in self-sensing push-pull solenoids (2005)
| Content Provider | CiteSeerX |
|---|---|
| Author | Li, Perry Y. Yuan, Qinghui |
| Description | Spool position feedback in an electrohydraulic valve typically requires a spool displacement sensing device such as a LVDT. Self-sensing is the methodology to obtain spool displacement information directly from the solenoid spool actuators, thus obviating the additional cost and footprint of a LVDT or another displacement sensing device. A self-sensing scheme that uses only the measurement of electrical signals to the pair of push-pull solenoids was first proposed in [1]. It uses the position dependence of electrical inductance in the solenoids to infer the spool displacement. The scheme in [1] relies on a flux observer and several infinite dimensional filters that require explicit resets, and is prone to singularity. The present paper proposes a modified scheme in which the flux observer (and hence the self-sensing) problem is cast in a linear time varying system setting so that standard linear observer design techniques can be brought to bear. |
| File Format | |
| Language | English |
| Publisher Date | 2005-01-01 |
| Publisher Institution | In the Sixth International Conference on Fluid Power Transmission and Control (ICFP’ 2005 |
| Access Restriction | Open |
| Subject Keyword | Spool Displacement Several Infinite Dimensional Filter Electrical Signal Electrical Inductance Electrohydraulic Valve Flux Observer Spool Position Feedback Modified Scheme Observer Design Technique Self-sensing Scheme Position Dependence Present Paper Solenoid Spool Actuator Self-sensing Push-pull Solenoid Push-pull Solenoid Spool Displacement Information Linear Time Additional Cost Explicit Reset |
| Content Type | Text |
| Resource Type | Article |
