Electricity: motive power systems – Positional servo systems – Adaptive or optimizing systems including 'bang-bang' servos
Reexamination Certificate
2007-07-17
2007-07-17
Vincent, David (Department: 2121)
Electricity: motive power systems
Positional servo systems
Adaptive or optimizing systems including 'bang-bang' servos
C700S028000, C700S029000, C700S052000, C318S135000, C318S565000, C318S600000
Reexamination Certificate
active
10474905
ABSTRACT:
The invention provides for the monitoring and control of a system, such as a linear electro-mechanical transducer, e.g. a linear electric motor, particularly when driven in a reciprocating manner. A dynamic model of the linear motor and its load is used to calculate from the input drive to the motor a predicted response of the motor. The predicted response is compared to a measured response and the model parameters are varied by global optimisation until the two match as closely as desired. The drive may be the voltage input to the electrical motor and the response may be the electrical current in the motor coils. The parameters and variables of the model, after optimisation, can be taken as good estimates of the actual operating parameters and variables of the linear motor. This gives a measurement of such quantities as the stoke and offset of the linear motor. The invention is particularly applicable to the use of linear motors to drive compressors, for instance in Stirling cycle coolers. The system can be applied to balanced pairs of compressors and to compressor systems which use an active balancer to cancel vibration in the system. In this case a balancer model is created and used in an analogous way to the motor model.
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Bo Peterson; “Induction Machine Speed Estimation, Observations on Observers”;Industrial Electrical Engineering and Automation (IEA) Lund Institute of Technology (LTH) http://www.iea.lth.se/; Copyright 1996.
ISIS Innovation Limited
Nixon & Vanderhye PC
Norton Jennifer L.
Vincent David
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