Real-time control of a nonlinear electromagnetic actuator. (English) Zbl 0666.93092
This paper describes theoretical and experimental investigations aimed at controlling the trajectory of a nonlinear, clapper-type electromagnetic actuator. The vehicle for the investigations is the three-piece actuator used in the IBM 4248 impact line printer. The control algorithm seeks to regulate flight time - the time required for the actuator to move from its rest position to its point of impact - by modulating the pulse width delivered to the coil as a function of one measurement of position and velocity. The actuator is modelled mathematically, and a control law based on initial conditions is numerically derived. A similar control law based on mid-flight conditions is derived experimentally, by computer- controlled adaptation, and its ability to regulate flight time is demonstrated.
MSC:
| 93C95 | Application models in control theory |
| 78A55 | Technical applications of optics and electromagnetic theory |
| 93C40 | Adaptive control/observation systems |
| 93C10 | Nonlinear systems in control theory |
| 93B40 | Computational methods in systems theory (MSC2010) |
| 49J30 | Existence of optimal solutions belonging to restricted classes (Lipschitz controls, bang-bang controls, etc.) |
Keywords:
bang-bang control; digital control; microprocessor control; pulse control systems; solenoids; electromagnetic actuator; control algorithmReferences:
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