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A Pitch-Roll Coupling Control Method of Ejection Seat Based on Spatial Moment Distribution

A technology of ejection seat and coupling control, which is applied in the direction of control without feedback, ejection/off-machine device, etc., to achieve the effect of improving motion trajectory, accurate and rapid adjustment, and improving life-saving performance

Active Publication Date: 2022-01-07
CHINA AVIATION LIFESAVING INST
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AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is: to solve the problem of lifesaving ejection with large pitch angle and unfavorable posture, the present invention provides a pitch-roll coupling control method of the ejection seat based on spatial moment distribution, which can effectively improve the lifesaving of the seat in low-speed unfavorable posture performance

Method used

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  • A Pitch-Roll Coupling Control Method of Ejection Seat Based on Spatial Moment Distribution
  • A Pitch-Roll Coupling Control Method of Ejection Seat Based on Spatial Moment Distribution
  • A Pitch-Roll Coupling Control Method of Ejection Seat Based on Spatial Moment Distribution

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Embodiment Construction

[0021] The present invention will be described in further detail below.

[0022] Such as figure 1 As shown in , when the ejection seat enters the free flight stage from the ejection stage after the ejection starts, the attitude angle of the seat is recorded Calculate the direction S of the resultant moment M that needs to be applied by directly adjusting the seat from the initial position Fht to the target position Fho, Obtain the relative size l of the moments that need to be distributed on the X-axis, Y-axis, and Z-axis of the seat body axis system x , l y , l z . Calculate the torque that needs to be output by each power rocket for attitude adjustment: if |lx|>|lz|, the rolling rocket will use the maximum torque m x Work, adjust or equivalent adjust pitch rocket moment value If |lx|≤|lz|, the pitching rocket takes the maximum moment m z Work, adjust or equivalent adjust the roll rocket moment value

[0023] image 3 , Figure 4 The rolling rocket and the pitc...

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Abstract

The invention belongs to the field of ejection lifesaving, and relates to an ejection seat pitch-roll coupling control method based on space moment distribution. A pitch-roll coupling control method of the ejection seat based on space moment distribution is proposed. On the basis of the ejection seat with a roll attitude rocket, a pair of pitch rockets are added to control the seat attitude, and the sky component A( The thrust of the rocket pack (the relative force of the thrust in the sky direction relative to the total thrust) measures the posture of the seat, and the value ranges from ‑1 to 1. The larger A means that the thrust of the rocket pack has a more obvious push-up effect on the seat, and the posture of the seat is higher. Excellent; according to the attitude angle of the seat after leaving the cabin, the working sequence of the pitching rocket, rolling rocket, and rocket package can be calculated, and the seat attitude can be adjusted more accurately and quickly. The life-saving performance of the unfavorable posture of the seat is improved.

Description

technical field [0001] The invention belongs to the field of ejection lifesaving, and relates to an ejection seat pitch-roll coupling control method based on space moment distribution. Background technique [0002] The ejection seat mostly adopts the single-degree-of-freedom attitude control technology in the roll direction. By controlling the working timing of the two roll attitude rockets installed on the left and right sides of the ejection seat, the seat attitude is adjusted to improve the life-saving performance of the seat. Single roll degree of freedom attitude control cannot solve the problem of seat ejection rescue under adverse working conditions with large pitch angles, and single roll degree of freedom attitude control technology has limitations. Contents of the invention [0003] The purpose of the present invention is: to solve the problem of lifesaving ejection with large pitch angle and unfavorable posture, the present invention provides a pitch-roll coupli...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B64D25/10G05D3/10
CPCG05D3/10B64D25/10
Inventor 余志友姜南
Owner CHINA AVIATION LIFESAVING INST
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