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Symmetric delay-lead correction integrated frequency design method

A technology of advanced correction and design method, applied in design optimization/simulation, special data processing application, geometric CAD, etc., can solve the problem of underutilization

Pending Publication Date: 2020-10-27
HARBIN INSTITUTE OF TECHNOLOGY SHENZHEN (INSTITUTE OF SCIENCE AND TECHNOLOGY INNOVATION HARBIN INSTITUTE OF TECHNOLOGY SHENZHEN)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional method of late-lead correction is to design the late link and the lead link separately, and does not make full use of the characteristics of the overall link of late-lead correction

Method used

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  • Symmetric delay-lead correction integrated frequency design method
  • Symmetric delay-lead correction integrated frequency design method
  • Symmetric delay-lead correction integrated frequency design method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0040] Such as figure 1 and figure 2 As shown, the integrated frequency design method of symmetric late-lead correction,

[0041] Correction is performed for a symmetric late-lead correction link of the form:

[0042]

[0043] Among them, α, τ, T are parameters to be designed, G c (s) at ω=ω m nearby, and , its phase angle is approximately Its amplitude is -10lgα, where Δ 1 ∈(6°~12°).

[0044] The method of the present invention is illustrated by the following examples.

[0045] Example: For an electrohydraulic servo system on an aircraft, it is necessary to design a correction compensator to make the servo system meet the following control indicators, where the open-loop transfer function of the system is:

[0046]

[0047] The following performance indicators are required to be met:

[0048] (1) Steady-state error when unit ramp input r(t)=t (2) Phase angle margin γ≥35°; (3) Shear frequency ω c ≥20rad / s.

[0049] Designing the Transfer Function G of S...

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Abstract

The invention discloses a symmetric delay-lead correction integrated frequency design method. The method comprises the following steps: (S1) determining an open-loop gain of a system according to a required steady-state performance index; (2) drawing a Bode diagram of the uncorrected system G0 (s) by using the known open-loop gain, and calculating the shear frequency omega c0, the phase angle margin gamma 0 and the gain margin Lg0 of the uncorrected system; (S3) determining alpha of an advance-delay correction link according to the requirement of the phase angle margin, and calculating an advance phase angle required to be provided by the advance link in order to enable the phase angle margin r0 to reach a required value; (S4) determining the shear frequency omega c of the corrected system; (S5) determining an advance correction link; (S6) determining a delay correction link; and (S7) checking whether the performance index of the system is met or not, if not, increasing the value of the additional phase angle delta, and recalculating from the step (S3). By means of the scheme, the purpose of processing delay and advance at a time is achieved, and high practical value and promotional value are achieved.

Description

technical field [0001] The invention belongs to the field of hydraulic servo control system frequency domain technology of aircraft, in particular, it relates to an integrated frequency design method of symmetrical late-lead correction. Background technique [0002] The present invention contemplates the design of a servo-hydraulic servo system on a radio-controlled aircraft. Hydraulic servos are used on radio-controlled aircraft to control the rudder and rudder. The steering gear composed of hydraulic servo system is the key executive device to ensure the performance of the aircraft. It is used to test the reliability of the steering gear and is of great significance for improving the safety of the aircraft. The invention provides a symmetrical late-lead correction integrated frequency design method to improve the performance of the hydraulic servo system, so as to enhance the stability of the system and improve the response speed of the system. [0003] The frequency cor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/15G06F30/20
CPCG06F30/20G06F30/15
Inventor 吴爱国张颖董瑞琦
Owner HARBIN INSTITUTE OF TECHNOLOGY SHENZHEN (INSTITUTE OF SCIENCE AND TECHNOLOGY INNOVATION HARBIN INSTITUTE OF TECHNOLOGY SHENZHEN)