Method for designing composite root locus multi-stage PID robust controller for multi-loop model cluster of aircraft

A technology of robust controller and design method, applied in electric controllers, controllers with specific characteristics, three-dimensional position/channel control, etc., can solve the problem of designing overshoot and other issues
CN103809433AActive Publication Date: 2014-05-21XIAN FEISIDA AUTOMATION ENG
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
XIAN FEISIDA AUTOMATION ENG
Publication Date
2014-05-21

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Abstract

The invention provides a method for designing a composite root locus multi-stage PID robust controller for the multi-loop model cluster of an aircraft. The method comprises the following steps of: directly determining to acquire the model cluster composed of amplitude-frequency and phase-frequency characteristics in a full envelope by virtue of a sweep-frequency flight test in different given heights and Mach number conditions; giving a closed-loop pole distribution limit index under the corresponding root locus description according to standard requirements on an amplitude-frequency margin and a phase margin in a flight envelope, determining the stage number and parameter values of the multi-stage PID robust controller by adding the multi-stage PID controller, and by virtue of the closed-loop pole distribution limit index in the full envelope of the aircraft and a model identification method in system identification; and designing the low-altitude flight robust controller meeting the full flight envelope, low in overshoot and stable from the concept of closed-loop pole distribution under the root locus description.
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Description

technical field

[0001] The invention relates to an aircraft controller design method, in particular to an aircraft multi-loop model cluster compound root locus multi-level PID robust controller design method, which belongs to the categories of measurement and control technology and flight mechanics. Background technique

[0002] The control of the take-off and landing process of the aircraft plays an important role in flight safety; due to the large change in flight speed during the take-off and landing process of the aircraft, even according to the longitudinal model, it will face strong nonlinear problems; on the other hand, the control rudder of the aircraft has saturation, dead zones, etc. Phenomenon; From the perspective of flight safety, when flying at ultra-low altitudes (such as aircraft takeoff / landing), the controller must ensure that the system has a certain stability margin, no overshoot and stability, which makes the design of ultra-low-altitude flight controller...

Claims

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