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AssigneeDanfoss Editron Oy
InventorsAntti Tarkiainen, Risto Tiainen, Matti Iskanius
Estimating the term…
A device-system comprises parallel operating devices (105-107) for driving an operating quantity towards a target value, and a control system for controlling each device at least partly based on a device-specific integral term relating to a time integral of a device-specific error signal that is indicative of a deviation of the operating quantity from the target value. The control system comprises a stabilizing system that computes an arithmetic average of the device-specific integral terms and corrects the device-specific integral terms towards the computed arithmetic average. The correction of the device-specific integral terms makes it possible to avoid unwanted drifts in the device-specific integral terms in a situation where there are differences between the device-specific error signals. The devices can be peers to each other and thus redundancy is achieved because one device can be removed from or added to the device-system without actions from the other devices.
A control system for controlling parallel operating devices configured to drive an operating quantity towards a target value, the control equipment comprising controllers for controlling the devices so that each controller is configured to control one of the devices at least partly based on a device-specific integral term maintained by the controller under consideration and relating to a time integral of a device-specific error signal available to the controller and indicative of a deviation of the operating quantity from the target value, wherein the control system further comprises a stabilizing system for computing, for each of the controllers, an arithmetic average of (i) the device-specific integral term maintained by the controller under consideration and (ii) one or more of the device-specific integral terms maintained by other ones of the controllers, and for correcting the device-specific integral term maintained by the controller under consideration towards the computed arithmetic average, wherein the stabilizing system is implemented with the controllers so that each of the controllers comprises:
A plurality of controllers for controlling a plurality of devices, each device being one of parallel operating devices configured to drive an operating quantity towards a target value, each controller of the plurality of controllers comprising:
A method for controlling parallel operating devices configured to drive an operating quantity towards a target value, the method comprising:
A non-volatile computer readable medium encoded with a computer program for stabilizing control of parallel operating devices configured to drive an operating quantity towards a target value, wherein the computer program comprises computer executable instructions for controlling a plurality of controllers of a programmable processing system to:
Dependencies are inferred from the claim text.