Method for analyzing a coupled vehicle/passenger system

Patent metadata

Field	Value
Publication number	US-11577860-B2
Application number	US-201916570277-A
Country	US
Kind code	B2
Filing date	Sep 13, 2019
Priority date	Mar 14, 2017
Publication date	Feb 14, 2023
Grant date	Feb 14, 2023

Abstract

A method for determining, by reanalysis, a vibratory environment of a coupled vehicle/passenger system. A vehicle is subjected to external forces Fext and is coupled to a new passenger including multiple payloads (e.g., x=I, . . . N payload(s)). At the level of vehicle/passenger interfaces Ix, the method comprising a step DET1) for determining, based on reference interfacial acceleration γx_ref of a reference passenger, the interfacial acceleration γx′ relative to the new passenger.

First claim

What is claimed is:

1. A computer implemented method for controlling a mechanical compatibility between a passenger and a vehicle, by determining, by reanalysis, a vibratory ambient of a coupled system including the vehicle and the passenger, the vehicle being subjected to external forces Fext and being coupled to a new passenger comprising x=1, . . . , N payload(s), at vehicle/passenger interfaces Ix, the method comprising the following steps:
DET 01) determining a reference accelerometric field yx_ref=(y 1_ref , y 2_ref ) at a vehicle/passenger interface of a reference passenger coupled to the vehicle, wherein the reference accelerometric field is determined based on a mechanical model of the reference passenger and a mechanical model of the vehicle; and
DET 1) determining an interfacial acceleration relating to the new passenger different from the reference passenger based on the reference accelerometric field y x-ref and the following relationship:
γY′ x (ω)={ I+M REF TOT −1 (ω)Δ M x P (ω)} −1 ·γ x ref (ω)

with
y xref (ω) being vector of accelerations on all degrees of freedom of the vehicle/passenger interface for the reference passenger;
Y′x(ω) being vector of accelerations on all degrees of freedom of the vehicle/passenger interface for the new passenger;
Δ M x P (ω)= M x P (ω)− M ref P (ω) with

M P X (ω) being the interface dynamic mass operator of the new passenger;
M P ref(ω) being the interface dynamic mass operator of the reference passenger; and

M REF TOT (ω) being the interface dynamic mass operator of the vehicle coupled to the reference passenger; and

the operators M X P (ω), M P ref(ω) and M REF TOT (ω) being obtained by a direct approach in the following manner:

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Assignees

• Centre Nat Etd Spatiales

Inventors

• Gonidou Luc-Olivier

Classifications

• B64G1/643

  for arranging multiple satellites in a single launcher · CPC title

• B64G1/6425

  arrangements for damping vibrations · CPC title

• B64G1/002

  Launch systems · CPC title

• B64G1/60

  Crew or passenger accommodations · CPC title

• G06F17/16

  Matrix or vector computation {, e.g. matrix-matrix or matrix-vector multiplication, matrix factorization (matrix transposition G06F7/78)} · CPC title