Parachutist falling motion simulation method based on multi rigid body model

A technology for motion simulation and skydiving, applied in special data processing applications, instruments, electrical digital data processing, etc.

Inactive Publication Date: 2016-08-31
中国人民解放军空军空降兵学院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this case, due to the complexity and variability of the parachutist model, it is difficult to use the traditional method to perform a complete motion simulation, and a new method must be found

Method used

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  • Parachutist falling motion simulation method based on multi rigid body model
  • Parachutist falling motion simulation method based on multi rigid body model
  • Parachutist falling motion simulation method based on multi rigid body model

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Embodiment Construction

[0011] The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0012] (1) Simplification of the skydivers human aerodynamic model (referred to as the skydivers model):

[0013] First, make the following assumptions,

[0014] The skydiver's torso and pelvis are simplified as an elliptical cylinder, the head is simplified as an ellipsoid, and the upper arm, forearm, thigh, and lower leg are simplified as an elliptical platform;

[0015] Ignore the relative motion of the wrist and ankle joints, consider the forearm and hand as a whole, and the calf and foot as a whole;

[0016] The neck, shoulders and hips are simplified as ball joints with a fixed center of rotation, the hinge points are located at their respective centers of gravity, and have 3 degrees of freedom;

[0017] The hinge points of the elbow joint and the knee joint are respectively located at the center of gravity of each joint.

[0018] Secondly, under ...

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Abstract

The present invention discloses a parachutist falling motion simulation method based on a multi rigid body model. Based on the human body multi rigid body model, deplaning falling motion simulation of a parachutist in a non-rigid body model is achieved for the first time. During a falling motion process, the parachutist can adjust positions and attitudes of the head and arms and legs relative to the trunk according to the need, and furthermore the whole body falling track and attitude can be changed. The method is already used in a parachutist parachute training simulation system, and compared with a traditional simulation method, simulation of parachutist falling motion tracks and complex attitudes is really achieved.

Description

technical field [0001] The invention relates to the field of computer simulation of flight mechanics, in particular to a method for simulating the falling motion of a parachutist based on a multi-rigid body model. Background technique [0002] There are two methods for parachutist fall motion simulation: one is the aerodynamics simulation method; the other is the flight mechanics simulation method. When the aerodynamic method is used, the fall motion of a parachutist is an extremely complex computational fluid dynamics problem. Professional software such as ANSYS FLUENT can be used to establish a three-dimensional solid model of the parachutist and perform dynamic simulation calculations based on the solid model. The difficulty of this method lies in: as far as the parachutist solid model is concerned, since the human body itself does not have a rigid structure, every part of the body, such as the head and limbs, can move freely, resulting in the irregularity of the three-di...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/367
Inventor 杨遵杨健简洁孙宏志杨晓明廖长耀
Owner 中国人民解放军空军空降兵学院
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