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A Motion Prediction and Compensation Method for Longitudinal Runway Based on Motion Platform

A motion platform and compensation method technology, applied in the field of control law design, can solve problems such as landing accuracy, adverse effects on safety, collision with the tail of the motion platform, and harsh landing environment of the aircraft, so as to improve landing accuracy and strong implementability Effect

Active Publication Date: 2017-04-19
SHENYANG AIRCRAFT DESIGN INST AVIATION IND CORP OF CHINA
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AI Technical Summary

Problems solved by technology

[0003] Compared with the general aircraft landing situation, the landing environment of the aircraft is more severe, mainly reflected in the existence of complex airflow disturbances at the tail of the ship and the movement of the runway caused by waves, which lead to changes in the ideal landing point, which will bring great impact on landing accuracy and safety. greater adverse effects
For example, the sudden rise of the runway may cause the aircraft to hit the runway position on the moving platform in advance or even hit the tail of the moving platform; or the sudden lowering of the moving runway may make the landing hook of the aircraft unable to hang the arresting wire and be forced to make an escape go-around

Method used

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  • A Motion Prediction and Compensation Method for Longitudinal Runway Based on Motion Platform
  • A Motion Prediction and Compensation Method for Longitudinal Runway Based on Motion Platform
  • A Motion Prediction and Compensation Method for Longitudinal Runway Based on Motion Platform

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Embodiment 1

[0034] A longitudinal runway motion estimation and compensation method for fully automatic landing,

[0035] 1) First, the runway motion model and the required runway parameters are given

[0036] Pitch angle (°) dynamic model of pitch motion:

[0037]

[0038] Vertical undulation motion (m) dynamic model:

[0039]

[0040] in, is the initial phase of the function, here we can set

[0041] The distance X from the center line of the pitching motion of the given runway to the desired landing point F =70m, runway above sea level distance H 0 =21m.

[0042] Then the height change of the ideal landing point caused by the runway movement can be obtained as:

[0043] h D =H 0 +Y s +X F θ s =36.22sin(0.6t)+0.305sin(0.2t)+21sin(0.63t)+38.5

[0044] 2) Runway Motion Compensator

[0045] The general form of the runway motion compensator:

[0046]

[0047] where parameter K DMC =180,T 1 =0.8, T 2 =7ξ DMC = 0.78, ω DMC =2.23,τ DMC = 1, the runway motion comp...

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Abstract

The invention discloses a longitudinal track motion estimation and compensation method based on a motion platform, and belongs to the technical field of control law design of a full-automatic landing system on the basis of the motion platform. In order to guarantee the fact that an airplane can track an ideal landing point synchronously, a landing guidance system must be compensated synchronously. The method aims to the last stage of a motion platform landing stage, the influences of sailing motions and swaying motions of the motion platform on the landing of the airplane are taken into comprehensive consideration, and estimation and compensation of motions of a motion track (the ideal landing point) are carried out. In the longitudinal aspect, the longitudinal motion signals of the motion track are introduced into a longitudinal guidance system after estimation and compensation so that the dynamic performance of the system can be improved, errors are restrained, and the tracking precision of the airplane is improved.

Description

technical field [0001] The invention relates to a method for predicting and compensating motion of a longitudinal runway based on a motion platform, and belongs to the technical field of control law design. Background technique [0002] Compared with the general aircraft landing, the landing process based on the moving platform is more complicated. When the aircraft lands on the moving platform, it will be subject to complex external disturbances, including wake flow, gust of wind and platform movement, etc. The landing environment is far away. Worse than land based aircraft. Among them, the motion of the motion platform has a great impact on the landing of the aircraft. Therefore, it is necessary to introduce the motion estimation and compensation technology of the runway into the fully automatic landing system based on the motion platform to ensure that the aircraft can land safely. [0003] Compared with the general aircraft landing situation, the landing environment of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05D1/10
Inventor 桂敬玲张扬邵铮张秀林
Owner SHENYANG AIRCRAFT DESIGN INST AVIATION IND CORP OF CHINA
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