Patent ID: 7295899
Filing Date: 2007-11-13
Classification: F01D,G05B

Abstract:
1. A controller configured to set a position of a control element in a power plant, the controller comprising: a signal matching stage coupled to receive a signal indicative of a should-be value, the signal matching stage configured to apply to the signal received by the signal matching stage a predetermined temporal characteristic required by an actuating signal to be applied to the control element, the signal matching stage further configured to supply an output signal containing the predetermined temporal characteristic; a summer having a non-inverting input terminal coupled to receive the output signal from the signal matching stage containing the predetermined temporal characteristic, the summer further having an inverting input terminal coupled to receive a signal indicative of an as-is value, the summer configured to supply an output signal constituting a difference between the signals received by the summer, the difference signal from the summer containing the predetermined temporal characteristic; and a position controller coupled to receive the output signal from the summer, the controller configured to generate the actuating signal for the control element, wherein the actuating signal contains the predetermined temporal characteristic without said position controller having to determine said temporal characteristic for the actuating signal, said temporal characteristic having been applied upstream the position controller at the signal matching stage.