Siemens Aktiengesellschaft

Hakan Koc

Raimund Kram

Richard Schneider

Günter Weber

A position value, a desired position value and future desired position values as well as, for each future desired position value, a value which is characteristic of the temporal offset between said future desired position value and the respective immediately preceding desired position value are predefined for a position controller for an axle. The position controller uses a model of the axle to determine a manipulated variable and a respective expected manipulated variable and an expected position value for the future desired position values. The position controller determines the manipulated variable, the expected variables and the expected position values in such a manner that a total deviation of the position value and the expected position values from the corresponding desired position values is optimized in accordance with a predetermined assessment function. It drives the axle in accordance with the manipulated variable.

Generalized predictive control (GPC) based position control method for an axle

The invention relates to an open-loop control process for the motional guidance of conveyed material () in a conveying device () and to a corresponding conveying device (). The conveying device () has a movable means () for realizing the conveyance and a first motion detector () for measuring a first actual position value (x) for the movable means () and a second motion detector () for measuring a second actual position value (x) for the conveyed material (). The control is herein realized with a position control having a position control clock (T) and with a speed control (GR) having a relatively faster speed control clock (T), in which, in the position control clock (T), desired position values (x) are preset as the command variable and, in the speed control clock (T), registered first actual position values (x) are fed back to the position control, in which the position control is provided, at least in part, in an open-loop control part (NC) and the speed control (GR) is provided in a drive part (A), and in which a control variable (R) is fed back into the position control, which control variable is dependent on second actual position values (x) registered in the position control clock (T). A high accuracy and dynamic can thereby be obtained.

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Erlangen, Germany

Hakan Koc