Design method of pi controller to prevent integral windup in engine control strategy switching

A control strategy and design method technology, applied in the direction of engine components, fuel control of turbine/propulsion device, charging system, etc., can solve problems such as system oscillation, and achieve the effect of eliminating static difference and avoiding integral saturation

Active Publication Date: 2021-12-28
INST OF ENGINEERING THERMOPHYSICS - CHINESE ACAD OF SCI
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Problems solved by technology

[0013] The purpose of the present invention is to provide a kind of PI controller design method that prevents integral saturation in aero-engine control strategy switching in order to solve the problems such as overshoot and system oscillation caused by integral saturation in the existing aero-engine control strategy switching process, In the present invention, the controller of each control strategy is designed in the form of multiplying the deviation by the proportional action coefficient plus the given value of the fuel flow at the previous moment multiplied by the first-order inertial link transfer function, and the current moment of all control strategies The given value of fuel flow is calculated from the given value of fuel flow at the previous moment, and the large deviation of the unselected control strategy will not be accumulated, which avoids integral saturation. Since it is still a PI controller in essence, it still includes an integral link , so it can also eliminate the static error of the system

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  • Design method of pi controller to prevent integral windup in engine control strategy switching
  • Design method of pi controller to prevent integral windup in engine control strategy switching
  • Design method of pi controller to prevent integral windup in engine control strategy switching

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[0034] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and examples.

[0035] The invention provides a PI controller design method for preventing integral saturation in the switching of control strategies of aero-engines. The PI controller at least includes a high-pressure rotational speed limiting closed-loop controller, an exhaust temperature limiting closed-loop controller, a low-pressure rotational speed limiting closed-loop controller, Compressor outlet pressure limited closed-loop controller, acceleration limited closed-loop controller, deceleration limited closed-loop controller, etc., each closed-loop controller adopts figure 1 The form of the PI controller is shown, and the control strategies of each closed-loop controller correspond to the closed-loop limit of high-pressure speed, closed-loop limit of exhaust temp...

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Abstract

The invention discloses a PI controller design method for preventing integral saturation in aero-engine control strategy switching, and relates to closed-loop control of high-pressure rotational speed, closed-loop limitation of exhaust temperature, closed-loop limitation of low-pressure rotational speed, closed-loop limitation of compressor outlet pressure, and closed-loop limitation of acceleration The PI controller design of multiple control strategies such as deceleration closed-loop limit and the switching of each control strategy, each closed-loop controller adopts the deviation multiplied by the proportional action coefficient plus the fuel flow given value at the previous moment multiplied by the first-order inertial link In the form of transfer function, the given value of fuel flow of all control strategies at the current moment is calculated from the given value of fuel flow selected at the previous moment, and the large deviation of the unselected control strategy will not be accumulated, and integral saturation will not occur , but it is still a PI controller in essence, including an integral link, which can also eliminate static error.

Description

technical field [0001] The invention belongs to the field of controller design, and relates to a design method of a PI control system, in particular to a design method of a PI controller for preventing integral saturation during control strategy switching of an aero-engine, and to controller design and control strategies of various control strategies of an aero-engine. Switching between various control strategies. Background technique [0002] The main control loop of an aero-engine is the main fuel control loop that takes the high-pressure rotor speed as the controlled variable. Due to the complex working state of the aero-engine, it may sometimes operate in some potentially destructive states, so in addition to the main fuel control loop Also set limit protection controls to prevent this from happening by enforcing additional limits. Key concerns include: [0003] 1) When the maximum limit value of the low-pressure rotor speed is exceeded, the possible disc rupture or bl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02C9/28
CPCF02C9/28
Inventor 刘蕾赵庆军赵巍项效镕胡斌周小勇
Owner INST OF ENGINEERING THERMOPHYSICS - CHINESE ACAD OF SCI
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