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Aero-engine distributed control system multi-performance robust tracking control method

A distributed control, aero-engine technology, applied in general control systems, control/regulation systems, adaptive control, etc., can solve problems such as dynamic performance parameter perturbation, external disturbance, and engine system dynamic performance deterioration, etc. Robustness, system stability, and good dynamic performance

Inactive Publication Date: 2017-05-10
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Abstract
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  • Application Information

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Problems solved by technology

Network delay may make the dynamic performance of the engine system worse, and may even lead to system instability
For the aero-engine distributed control system, in addition to the network delay, the aero-engine is a complex aerodynamic thermomechanical system, its working environment and working state are complex and changeable, and there are individual differences in the production and installation process, all of which make the engine characteristics There are strong nonlinearity and uncertainty, perturbation of dynamic performance parameters, severe coupling between parameters and external disturbances

Method used

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  • Aero-engine distributed control system multi-performance robust tracking control method
  • Aero-engine distributed control system multi-performance robust tracking control method
  • Aero-engine distributed control system multi-performance robust tracking control method

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Embodiment

[0068] In order to verify the effectiveness of the designed multi-performance robust tracking controller for the engine distributed control system, the digital simulation of the rotational speed tracking control is carried out under the MATLAB environment.

[0069] At the engine design point H=0, Ma=0, W f =2.48kg / s,A 8 =0.2597m 2 , first use the combination of small perturbation method and fitting method to solve the coefficient matrix of the state variable model at this working point, each coefficient matrix is:

[0070]

[0071]

[0072] The uncertainty bound is α=β=0.05.

[0073] The augmented system matrix is:

[0074]

[0075]

[0076] The upper bound of system delay is h=0.1s. Take the weighting matrix of the quadratic performance index

[0077]

[0078] Solving the linear matrix inequality, we get:

[0079]

[0080] Under the action of this controller, the speed-pressure ratio response curves of the engine linear model and component-level nonlin...

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Abstract

The invention discloses an aero-engine distributed control system multi-performance robust tracking control method. The method comprises the steps of building an engine state variable model; building an engine distributed control system dynamic model containing network time delay and uncertainty; building an augmented system model containing a tracking error; and designing a multi-performance robust tracking controller. The method overcomes the limitation that a traditional control method for time delay and uncertainty in an engine distributed control system can only realize performance guarantee or interference resistance, and a time delay containing engine distributed control uncertainty dynamic system is ensured not only to have good static and dynamic performance and limited input cost, but also have given robustness for the system uncertainty and external interference.

Description

technical field [0001] The invention belongs to the field of aero-engine control, in particular to a robust control method for an aero-engine distributed control system. Background technique [0002] The structure of the aero-engine distributed control system is flexible and diverse, but it mainly includes intelligent nodes such as various subsystem controllers, intelligent sensors, intelligent actuators, and monitoring and management units. The control units of each intelligent subsystem communicate with the controller, Monitoring and management unit etc. for data transmission and exchange. Compared with the traditional centralized engine control, each intelligent subsystem in the distributed control has different levels of signal control and processing functions to realize on-site signal processing or small closed-loop control. In the smart sensor, the basic functional unit perceives the physical quantities required by the control system such as temperature and pressure. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B13/04
Inventor 潘慕绚张瑞黄金泉
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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