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Adaptive filtering method

A filter and frequency filtering technology, which is applied in the direction of adaptive network, devices using electric/magnetic methods, electric controllers, etc., can solve the problems of control system performance impact, etc., and achieve the effect of stable state and good performance

Pending Publication Date: 2020-10-30
SAFRAN AIRCRAFT ENGINES SAS
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

The performance of the control system is thus affected

Method used

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Examples

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Embodiment Construction

[0069] figure 1 A twin-spool twin-flow turbojet 9 controlled by a control system 7 is schematically shown. Measurement of at least one physical quantity of the jet turbine engine by means of sensors: the rotational speed N1 of the low-voltage spool 1 can be measured by a speed sensor 3a generating an input signal 3b from N1, the rotational speed N2 of the high-voltage spool 2 can be measured by a speed sensor which generates an input signal 4b from N2 4a Take measurements.

[0070] Other physical quantities can be measured, such as, for example, the pressure in the region of the high voltage spool 2, which is measured by the pressure probe 5a generating the input signal 5b.

[0071] The input signals 3b, 4b and 5b are sent to a computer 6 which is part of a control system 7 .

[0072] The computer 6 transmits a base signal 8' relating to one of the physical quantities for which the computer has received an input signal, for example an angular velocity signal.

[0073] This ...

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Abstract

The invention relates to a method for filtering an input signal (3b, 4b, 5b) relative to a physical variable of a turbine engine (9), the input signal being digitised, the method implementing frequency filtering of said signal in a computer (6) of a control system (7) of said turbine engine (9), said signal being provided at the input of the computer, a digital derivative of said signal being intended for being used by the control system (7), characterized in that it involves: detecting an amplitude variation of said variable on said input signal, by a step of generating a second derivative signal (S) of the input signal and a step of comparing a value of the second derivative value of the input signal with at least one predetermined threshold (S1...Sn); and adapting the frequency filtering of said input signal as a function of the detected amplitude variation of said variable, by a step of controlling a controlled filter (PB11) capable of applying frequency filtering to the input signal, so that the controlled filter applies or does not apply the frequency filtering as a function of a result of the comparison step.

Description

technical field [0001] The invention relates to a device for filtering a measured signal related to a physical quantity of a turbine engine (usually the angular velocity of the engine shaft of the turbine engine) in order to generate a base signal (usually a derivative signal of the speed signal), aiming at In control systems for turbine engines. [0002] The invention also relates to a turbine engine whose control system contains a filtering device of this type. Background technique [0003] In the control of a system parameter, the derivative of the signal of the physical quantity is usually established to use the derivative of the signal of the physical quantity in a feedback loop. [0004] For example, in a twin-spool twin-flow turbojet it is important to control the angular velocity of the engine shaft in at least one of the two spools. Usually the aim is to control the rotational speed N2 of the high-voltage spool in rpm or revolutions per minute or even also the rot...

Claims

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Application Information

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IPC IPC(8): G06F17/15F02C9/58G05B11/01G05B19/416H03H21/00G01P3/46
CPCF02C9/58G01P3/46G01P21/02G06F17/15H03H21/0012F05D2270/304F02C9/00F05D2270/122F05D2270/71H03H21/0025
Inventor 赛德瑞克·德杰拉希
Owner SAFRAN AIRCRAFT ENGINES SAS
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