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Delay elimination method of rhodium detector signal based on Luenberger form H2/H infinity hybrid filtering

A hybrid filter and signal delay technology, applied in radiation measurement, neutron radiation measurement, instruments, etc., can solve problems such as difficult application and difficult to obtain statistical characteristics.

Inactive Publication Date: 2015-09-09
NUCLEAR POWER INSTITUTE OF CHINA
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0004] At present, the elimination of signal delay applied to rhodium self-powered detectors is mainly based on the Kalman filter. It must be assumed that the external disturbance input signal of the system is a white noise signal with known statistical characteristics. When the input signal is a finite energy Uncertain signals, whose statistical properties are difficult to obtain, the method is difficult to apply

Method used

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  • Delay elimination method of rhodium detector signal based on Luenberger form H2/H infinity hybrid filtering
  • Delay elimination method of rhodium detector signal based on Luenberger form H2/H infinity hybrid filtering
  • Delay elimination method of rhodium detector signal based on Luenberger form H2/H infinity hybrid filtering

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Embodiment

[0089] Such as figure 1 The structure diagram of rhodium self-sufficient neutron detector shown, in which the names of the components of each serial number correspond to: 1—emitter, 2—insulation layer, 3—collector, 4—wire, 5—protective shell, 6—insulation Cable, 7-current line, 8-base line, 9-sealed tube, 10-current output end, the rhodium self-sufficient energy neutron detector, its characteristic parameter is: λ 1 =ln2 / 42.3s -1 =0.016386s -1 ,λ 2 =ln2 / 4.34 / 60s -1 =0.00266186s -1 , c=0.06, a 1 =0.879,a 2 =0.061; image 3 It is the principle process diagram of rhodium and neutron nuclear reaction, for image 3 During the reaction process, the figure 1 device for measurement. Such as figure 2 shown, based on the Luenberger form H 2 The rhodium detector signal delay elimination method of the / H∞ hybrid filter comprises the following steps carried out in sequence: step 1, establishing the nuclear reaction model of rhodium and thermal neutrons; step 2, adopting decoup...

Embodiment 2

[0143] This embodiment makes the following further limitations on the basis of Embodiment 1: In the case of shifting, the step 4 adopts the following method to eliminate delay:

[0144] In the shift area (k 1 ≤k≤k 2 ), assuming that the neutron flux density remains constant, then:

[0145] n(k+1)=n(k) (20)

[0146] x 1 ( k + 1 ) = 1 c ( a 1 - a 2 · g / λ 1 ) · ( 1 - e - λ 1 · Ts ...

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Abstract

The invention discloses a delay elimination method of a signal of a rhodium self-powered detector based on Luenberger form H2 / H infinity hybrid filtering, which comprises the following steps: 1)establishing a nuclear reaction model of rhodium and thermal neutron; 2)employing decoupling transformation to establish a discrete state equation corresponding to the nuclear reaction model; 3)determining the instantaneous response share of the current of the rhodium self-powered detector; and 4)using a H infinity filter for delay elimination of the current signal of the rhodium self-powered detector. The method is capable of performing delay elimination on the current signal of the rhodium self-powered detector, noise can be effectively inhibited, normal usage of the rhodium self-powered detector can be carried out under transient condition of a reactor. The method requires that error variance of filtering corresponding to a measured error channel has an upper bound, so that when the input signal is an indeterminate signal possessing limit energy, the normal application of the rhodium self-powered detector can be carried out.

Description

technical field [0001] The invention relates to the processing technology of rhodium self-sufficient energy neutron detector signals in the nuclear reactor power distribution on-line monitoring system, specifically based on the Luenberger form H 2 / H∞ hybrid filter for rhodium detector signal delay elimination method. Background technique [0002] The rhodium self-supplied neutron detector used as the in-core detector of the advanced core measurement system, the secondary nuclide produced by the reaction of the sensitive material rhodium and the neutron undergoes beta decay to generate a current, and the magnitude and location of the current in a steady state The flux is directly proportional, so by measuring the rhodium self-powered detector can infer the neutron flux at its location. Since the main component of this type of detector current is produced by the β decay of secondary nuclides, in the transient state of the reactor (the neutron flux level changes), the detecto...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G21C17/108G01T3/00G06F19/00
CPCG01T3/00G16C99/00G21C17/108Y02E30/30
Inventor 彭星杰李庆龚禾林陈长赵文博刘启伟李向阳于颖锐
Owner NUCLEAR POWER INSTITUTE OF CHINA
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