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General closed-loop control system for providing positive and negative constant flow sources for aircraft engines

An aircraft engine, closed-loop control technology, applied in control/regulating systems, regulating electrical variables, instruments, etc., can solve problems such as unstable operation and poor maintainability

Inactive Publication Date: 2014-02-26
BEIJING HANGKE ENGINE CONTROL SYST SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the existing closed-loop control devices have problems such as poor maintainability and unstable operation.

Method used

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  • General closed-loop control system for providing positive and negative constant flow sources for aircraft engines
  • General closed-loop control system for providing positive and negative constant flow sources for aircraft engines
  • General closed-loop control system for providing positive and negative constant flow sources for aircraft engines

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Embodiment Construction

[0018] A general closed-loop control system that provides positive and negative constant current sources for aircraft engines, including a power supply module 1, a high-precision measurement module 2, an isolation conversion module 3, a data acquisition module 4, and a power drive module 5, wherein,

[0019] The power module is used to convert 220VAC AC power into different DC voltages, and is used to provide working power for the high-precision measurement module 2, the isolation conversion module 3, the data acquisition module 4 and the power drive module 5; the power module is selected from military products during the specific implementation process High precision linear regulated power supply module and DC-DC module with stable operation and small ripple. Its main function is to convert the AC 220VAC into a stable and reliable DC voltage, respectively provide ±15VDC working power for the high-precision measurement module 2, provide ±12VDC working power for the isolation co...

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Abstract

The invention belongs to the technical field of engine control and particularly relates to a practical aircraft engine fuel electronic control system. A general closed-loop control system for providing positive and negative constant flow sources for aircraft engines is mainly applied to performance adjustment and static testing for an engine with an electro-hydraulic servo valve being served as an electro-hydraulic conversion device and can be used for primarily calibrating steady state characters of the engine. According to the general closed-loop control system for providing the positive and negative constant flow sources for the aircraft engines, a high-precision measuring module which provides excitation signals for an LVDT (Linear Variable Differential Transformer) collects a current position of the LVDT, a preset instruct state of the closed-loop system is changed, PID (Proportion Integration Differentiation) calculation is performed on the current position and a preset position of the LVDT under a closed-loop control state, and the flow of the engine is controlled. The closed-loop control system needs to maintain current values to be at steady state values during a testing process.

Description

technical field [0001] The invention belongs to the technical field of engine control, in particular to a practical aircraft engine fuel electronic control system. Background technique [0002] The main function of the closed-loop control system is to collect the current working state of the product, give command signals through calculation, and drive the electro-hydraulic servo valve of the product, so as to control the oil supply of the engine. There are mainly two kinds of closed-loop control devices in China, one is the acquisition and driving circuit built by analog circuit, and the other is the combination of digital platform and driving circuit. These two closed-loop control devices have their own advantages and disadvantages. The response speed of the analog circuit is fast, but the operation is unstable, the core processing chip is very easy to damage, and the maintenance cost is high. The advantages of the digital platform are stable operation, reliability, and fa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05F1/46
Inventor 杨佳丽刘鸿鹄杜鑫李军伟廖远洋
Owner BEIJING HANGKE ENGINE CONTROL SYST SCI & TECH
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