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Weak link identification method of diesel engine electronic control system under strong electromagnetic pulses

A diesel engine and electronic control system technology, applied in character and pattern recognition, computer components, instruments, etc., can solve the problems of high cost of strong electromagnetic pulse test, poor test method versatility, and many uncertain factors of electromagnetic sensitivity

Active Publication Date: 2019-08-20
JILIN UNIV
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Problems solved by technology

[0008] The invention provides a method for identifying weak links in the electric control system of diesel engines under strong electromagnetic pulses, so as to solve the problem of high cost of strong electromagnetic pulse tests and limited sample data. Uncertainty factors in parameters such as electromagnetic sensitivity lead to problems such as poor versatility of test methods

Method used

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  • Weak link identification method of diesel engine electronic control system under strong electromagnetic pulses
  • Weak link identification method of diesel engine electronic control system under strong electromagnetic pulses
  • Weak link identification method of diesel engine electronic control system under strong electromagnetic pulses

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Embodiment Construction

[0077] Include the following steps:

[0078] Step 1. According to the principle of diesel engine electronic control structure, accurately model the fault network of diesel engine electronic control system

[0079] (1) Classify the electronic control components of diesel engines

[0080] According to the functional structure and working principle of the electronic control components of the diesel engine, the electronic control components are divided into n groups (a positive integer of n>1), which respectively belong to n subsystems (the electronic control components that work together are divided into one group), Among them, the i-th (positive integer of 1≤i≤n) subsystem contains m i A sensor (called the i-th sensor group, a total of n groups of sensors) and an actuator;

[0081] 1. The fuel supply system determines the current speed of the diesel engine based on the signals of the crankshaft position sensor and the camshaft position sensor. Combined with the calculation of ...

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Abstract

The invention relates to a weak link identification method for a diesel engine electronic control system under strong electromagnetic pulses, and belongs to the field of weak link identification of systems under strong electromagnetic pulses. Firstly, the prior failure probability from a part to a system level under strong electromagnetic pulses is predicted, then the posterior probability of faults of all electric control parts under the engine failure condition is calculated according to a Bayesian probability formula and ranked to identify weak links of the electric control parts, and the part needing key protection is selected when an electromagnetic protection scheme is designed. Advantages are as follows: under the condition that the samples are limited, weak links of the diesel engine electric control part under strong electromagnetic pulse irradiation can be identified; the method has universality, and solves the problems that the test method is high in cost, weak link identification cannot be carried out under the condition that sample data is limited, and the test method is poor in universality due to multiple uncertain factors of parameters such as a strong electromagnetic pulse irradiation source and electromagnetic sensitivity of an electric control part; protection cost is saved, and electromagnetic environment adaptability of the engine is improved.

Description

technical field [0001] The invention belongs to the field of identifying weak links of systems under strong electromagnetic pulses, and in particular relates to a diesel engine system under strong electromagnetic pulse irradiation, capable of identifying weak links of an electric control system when the diesel engine system fails. Background technique [0002] As an important means of transportation in modern society, automobiles are increasingly used in electronic equipment. In the face of high-power microwave weapon attacks, vehicle electronic equipment will inevitably be interfered or even damaged to varying degrees. As the core of the car, the engine system has a high degree of electronic control and is also relatively sensitive to electromagnetic pulse attacks. Nowadays, the development of diesel engine is becoming more and more perfect. With its advantages of high efficiency and wide power range, it is widely used in industry, agriculture, military and civilian fields...

Claims

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Application Information

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IPC IPC(8): G06K9/62G06Q10/06
CPCG06Q10/0639G06F18/29
Inventor 孙晓颖刘恬诗赵昱陈建孙铁刚张林王秀成武艺张骞史册
Owner JILIN UNIV
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