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Robust detection method for intermittent multiplicative sensor fault in electric multiple unit (EMU) braking system

A sensor fault and braking system technology, applied in the field of signal processing, can solve the problems such as far from reaching automatic and intelligent detection, detection performance relying on the experience of the driver, and inability to detect intermittent sensor faults.

Active Publication Date: 2017-10-20
SHANDONG UNIV OF SCI & TECH
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Problems solved by technology

However, the existing robust sensor fault detection methods can usually only detect systems with specific structural model uncertainties, and are only suitable for the detection of permanent sensor faults, and cannot detect multiplicative intermittent sensor faults.
At present, the detection of such faults generally requires engineering and technical personnel to follow the car for analysis and processing, which is far from automatic and intelligent detection, which consumes a lot of manpower and material resources, and the detection performance depends on the experience of the car followers, which brings great hidden dangers to driving safety.

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  • Robust detection method for intermittent multiplicative sensor fault in electric multiple unit (EMU) braking system
  • Robust detection method for intermittent multiplicative sensor fault in electric multiple unit (EMU) braking system
  • Robust detection method for intermittent multiplicative sensor fault in electric multiple unit (EMU) braking system

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Embodiment Construction

[0051] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:

[0052] A robust detection method for intermittent sensor faults in the brake system of EMUs, the basic principle of which is as follows: figure 2 As shown, the process is as follows figure 1 As shown, it specifically includes the following steps:

[0053] Step 1: Establish the state space model of the brake system of the EMU, as shown in formula (1):

[0054]

[0055] in, is the system state, for the control input, is the measurement output; is the process noise, is the measurement noise; is the process parameter, is the measurement parameter; is the process parameter uncertainty, is the measurement parameter uncertainty; It is a multiplicative intermittent sensor fault, and its form is shown in formula (2):

[0056]

[0057] Among them, Γ(·) is the unit step function, F i is the mode of the i-th intermittent fault,...

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Abstract

The invention discloses a robust detection method for an intermittent multiplicative sensor fault in an electric multiple unit (EMU) braking system, and belongs to the field of signal processing. The method comprises the steps of establishing a state space model of an EMU braking system, designing a robust residual generator, and designing a fault detection strategy. The robust detection method in the invention effectively ensures practical application requirements of detection of the multiplicative intermittent sensor fault in the EMU, realizes online detection of the occurrence and disappearance of the multiplicative intermittent sensor fault in real time under the condition that the system has a random uncertainty, and achieves automatic and intelligent detection.

Description

technical field [0001] The invention belongs to the field of signal processing, and in particular relates to a robust detection method for intermittent sensor faults in the braking system of an EMU. Background technique [0002] As one of the nine key technologies of EMUs, whether the braking system of EMUs can work stably and reliably is directly related to the driving safety of EMUs. Its sensors are mainly used for information acquisition, and any failure may cause huge casualties and economic losses. Therefore, it is very important to ensure the reliability of the EMU brake system sensors. [0003] In the technical system of the brake system of EMUs, intermittent sensor faults are called live faults by engineers and technicians, and they are a type of frequent faults. However, the existing robust sensor fault detection methods can usually only detect systems with specific structural model uncertainties, and are only suitable for the detection of permanent sensor faults, ...

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Application Information

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IPC IPC(8): G05B23/02
CPCG05B23/0243G05B2219/24065
Inventor 周东华张峻峰何潇卢晓
Owner SHANDONG UNIV OF SCI & TECH
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