Stage design GTE modernity
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Stage design GTE modernity

Stage design GTE modernity

Increasing the degree of integration of electronic component base, the introduction of multi-layer printed circuit boards, surface mount technology will significantly reduce the weight and dimensions of electronic regulators. During the period from mid-1980-ies. to date there was a decrease in these indicators 4-6 times.

The reliability of electronic control systems for turbine engine is provided a set of measures to be implemented at the stages of design, manufacture and operation of the systems.

At the stage of determining the reliability of the design developed electronic controller is the use of highly reliable components of electronic equipment with a high degree of integration. Increasing the level of integration of the element base leads to a reduction in the number of elements used, soldered and welded joints, boards and connectors in the electronic controller, and thus to improve its reliability.

The transition from discrete elements and universal integrated circuit first to the micro, and then - to the registered LSI significantly increased the reliability of electronic control systems. Custom VLSI allow you to create single-channel electronic controllers with MTBF 40. .60 Thousand. H.

Siting electronic control with comfortable operating conditions of temperature, vibration, humidity, etc. It can significantly increase its reliability. For example, reducing the temperature by up to 100 50 ° C increases the reliability of analog circuits in 15-20 time digital - an order of magnitude.

To improve the reliability of the electronic controller is used redundancy. The electronic engine management system is used as a full backup of a channel and a partial - certain enough of trusted sites.

Currently, the most widely used two-channel electronic systems cross-linked between channels. Such a system is constructed by using two

winding actuators DUT. The sensors may be reserved completely, or only the sensitive elements.

To implement structural redundancy, which allows to connect backup devices in case of failure of the main ones, the system contains hardware-software means of built-in control that perform the monitoring by the method of sequential expansion and coverage of all parts of the system based on the monitored and efficient elements. In this case, the control of the system begins with a check of the power supply and the quartz generator of the calculator, performed with the help of special electrical circuits. Then, the computer core and internal communication lines of the system are self-tested using tests of varying complexity and efficiency. In the case of their normal operation, the system proceeds to verify the peripheral elements and devices. If there are failures and failures, a number of repeated inspections are carried out during the control, and then a decision is made about the reliability of the failure.

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