Method for analyzing global sensitivity of movement mechanism

A sensitivity analysis, motion mechanism technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems such as steering mechanism failure, affecting the normal operation of steering mechanism, major traffic accidents, etc.

Inactive Publication Date: 2018-05-18
NORTHWESTERN POLYTECHNICAL UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0003] Taking the automobile steering mechanism as an example, the automobile steering mechanism is a mechanism used to control the driving direction of various wheeled or tracked vehicles. During the driving process of the car, the steering mechanism controls the driving direction of the vehicle through multiple actions. This pro

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  • Method for analyzing global sensitivity of movement mechanism
  • Method for analyzing global sensitivity of movement mechanism
  • Method for analyzing global sensitivity of movement mechanism

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Embodiment Construction

[0078] Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete and will fully convey the concept of example embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided in order to give a thorough understanding of embodiments of the present disclosure. However, those skilled in the art will appreciate that the technical solutions of the present disclosure may be practiced without one or more of the specific details being omitted, or other methods, components, devices, steps, etc. may be adopted. In other instances, well-known technical solution...

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Abstract

The invention provides a method for analyzing the global sensitivity of a movement mechanism, and the method is applied to the movement mechanism containing a gap. The method includes the following steps that according to a preset input variable and a preset output variable, an actual motion relational expression and an ideal motion relational expression are determined, according to the actual motion relational expression and the ideal motion relational expression, a motion error function is determined, an envelope function is determined based on the motion error function, through the combination of the envelope function and a global sensitivity calculation formula, a calculation formula of each sensitivity index is determined, and based on the calculation formula of each sensitivity index, global sensitivity analysis is conduced on one movement mechanism containing the gap. The global sensitivity analysis method based on the envelope function is provided, and on one hand, the consistency of obtained data is high and the accuracy is high, on the other hand, the method is small in calculation cost; the calculation efficiency is higher, the calculation cost is relatively low, and themethod thus has high practicability and theoretical guidance effects.

Description

technical field [0001] The present disclosure relates to the technical field of system robustness analysis and structural optimization design, in particular to a global sensitivity analysis method of a motion mechanism. Background technique [0002] In the field of engineering design, global sensitivity analysis is an important theoretical tool for studying the degree to which input parameters of a mechanical system affect the output response. In recent years, various global sensitivity analysis methods have been developed rapidly. Sobol and Iman proposed a global sensitivity analysis method based on variance, assuming that the variance of variables can fully describe the uncertainty index of the model output. Borgonovo proposed moment-independent global sensitivity index to reflect the importance difference of basic variables. Cui studied the global sensitivity index based on variance and moment independence under random excitation, and applied it in the research on the s...

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/15G06F30/17
Inventor 魏鹏飞岳珠峰刘付超周长聪张政王文选
Owner NORTHWESTERN POLYTECHNICAL UNIV
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