Many of the most promising applications for mobile robots require very high reliability. The current generation of mobile robots is, for the most part, highly unreliable. The few mobile robots that currently demonstrate high reliability achieve this reliability at a high financial cost. In order for mobile robots to be more widely used, it will be necessary to find ways to provide high mission ...

In this paper, a heuristic is proposed to find out the reliability of a directed network by using directed acyclic graph. This directed network has imperfect nodes as well as imperfect links. Directed acyclic graph based reliability computation involves three main steps: In the first step, built the reliability function of the given directed network which is the union of all min-paths from sour...

This paper studies reliability optimization of a series-parallel system with fuzzy random lifetimes. A fuzzy random reliability model is developed to maximize the system reliability. Since the reliability function consists of fuzzy random parameters, classical mathematical programming methods is not applicable to the reliability model. Therefore, in order to solve the model, a fuzzy random simu...

This paper presents a mixed perturbation Monte-Carlo method for static and reliability analysis of structural systems with a mixture of random and interval parameters/loadings. Using a combination of the Taylor expansion, matrix perturbation theory and random interval moment method, the expressions for the mean value and standard deviation of random interval structural responses are developed. ...

First/second-order reliability method (FORM/SORM) is considered to be one of the most reliable computational methods for structural reliability. Its accuracy is generally dependent on three parameters, i.e. the curvature radius at the design point, the number of random variables and the ®rst-order reliability index. In the present paper, the ranges of the three parameters for which FORM/SORM is...

A new method is proposed for shape sensitivity analysis of a crack in a homogeneous, isotropic, and nonlinearly elastic body subject to mode I loading conditions. The method involves the material derivative concept of continuum mechanics, domain integral representation of the J-integral, and direct differentiation. Unlike virtual crack extension techniques, no mesh perturbation is required in t...

This paper investigates the use of the inverse first-order reliability method (inverseFORM) to quantify the uncertainty in the remaining useful life (RUL) of aerospace components. The prediction of remaining useful life is an integral part of system health prognosis, and directly helps in online health monitoring and decision-making. However, the prediction of remaining useful life is affected ...

First-order methods such as SGD and Adam are popularly used in training Neural networks. On the other hand, second-order have shown to better performance faster convergence despite their high computational cost by incorporating curvature information. While determine step size line search approaches, first-order achieve efficient learning devising a way adjust size. In this paper, we propose new...