When building up a fuzzy diagnosis system for machinery diagnosis, fuzzy relation between failure symptoms and failure categories must be defined for fuzzy inference. However, it is not easy to search out the failure ...
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When building up a fuzzy diagnosis system for machinery diagnosis, fuzzy relation between failure symptoms and failure categories must be defined for fuzzy inference. However, it is not easy to search out the failure symptoms by which all failure categories can be distinguished perfectly and automatically. In order to resolve the problem, we proposed (1) a new type of symptom parameter function called off-group type of symptom parameter (OGSP); (2) the identification method of the OGSP; (3) the identification method of the membership function of OGSP; (4) the algorithm of sequential fuzzy inference by using the OGSP and its membership function for diagnosis. The efficiency of the above methods has been verified by applying them to the ball bearing diagnosis system.
In this paper, a dynamic model of distributed parameter system and a robust control architecture are developed for the closed chain motion of two two-link flexible manipulators holding a common rigid object in a horiz...
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In this paper, a dynamic model of distributed parameter system and a robust control architecture are developed for the closed chain motion of two two-link flexible manipulators holding a common rigid object in a horizontal workspace. Several experimental results for the cooperative control of two flexible manipulators are shown.
Assembly Instruction Manuals usually consist of both explanation and illustration. An expart who has rich knowledge on mechanical assemblies is able to under stand illustration without reading explanation. It is, how ...
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Assembly Instruction Manuals usually consist of both explanation and illustration. An expart who has rich knowledge on mechanical assemblies is able to under stand illustration without reading explanation. It is, how ever, difficult for a novice to read an instruction manual without referring to both of them. People may probably read explanation and see illustration alternately. It is difficult to model the human method because switching between two processes depends on knowledge level. In this paper, a method is proposed as the first version for integrating interpretation by both explanation and illustration.
The singular stress field around a sharp notch tip is expressed as a sum of two independent fields: a symmetric field with a stress singularity 1/tau(1-lambda 1) and a skew-symmetric field with a stress singularity 1/...
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The singular stress field around a sharp notch tip is expressed as a sum of two independent fields: a symmetric field with a stress singularity 1/tau(1-lambda 1) and a skew-symmetric field with a stress singularity 1/tau(1-lambda 2). The intensities of the symmetric and skew-symmetric singular stress fields are defined in terms of constants K-I and K-II, respectively. In this study, a plane problem of a strip with single or double edge notches under tension or in-plane bending is considered. The bisector of the notch may be inclined to the edge, so that the two singular stress fields with different singularities may be created simultaneously at the notch tip. The body force method is used to calculate the stress intensity factors K-I and K-II. In numerical analysis, basic density functions of the body forces are introduced to characterize the stress singularity at the notch tip. The advantages of this technique are the high accuracy of results, due to the smoothness of the unknown weight functions, and the presence of the direct relation between the values of K-I and K-II and the values of unknown weight functions. The stress intensity factors are systematically calculated for the various geometrical conditions.
In this paper, an exact dynamic model and a control architecture are developed for the closed chain motion of two two-link flexible manipulators holding a common rigid object in a horizontal workspace. On the basis of...
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In this paper, an exact dynamic model and a control architecture are developed for the closed chain motion of two two-link flexible manipulators holding a common rigid object in a horizontal workspace. On the basis of some assumptions we derive the quasistatic equations and design the cooperative controller of two flexible manipulators. A set of experiments for the cooperative control of two flexible manipulators using a force sensor has been carried out.
This paper addresses the computational aspects of the frequency response for sampled-data systems. We first give two types of lower bound formulas. The first is derived via fast sampling of the input functions and the...
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This paper addresses the computational aspects of the frequency response for sampled-data systems. We first give two types of lower bound formulas. The first is derived via fast sampling of the input functions and the second is derived via the dual system. It is shown that as the fast sampling period approaches zero, these lower bounds converge to the gain. Two different formulas for upper bounds are also obtained. One is based on the information about the closed-loop poles, and another relates the gains of the /spl Hscr//sub 2/ norm equivalent discrete-time system. We then discuss the bisection search. It is seen that where certain non-degeneracy condition holds, bisection search is possible, some comparisons are made with numerical examples.
The plane problem of an infinite plate containing an inclusion is considered. The singular stress field around the inclusion corner tip is expressed as a sum of two independent types: a symmetric type with a stress si...
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The plane problem of an infinite plate containing an inclusion is considered. The singular stress field around the inclusion corner tip is expressed as a sum of two independent types: a symmetric type with a stress singularity 1/r(I-lambda1) and a skew-symmetric type with a stress singularity 1/r(I-lambda2). The intensities of the symmetric and skew-symmetric singular stress fields are defined in terms of constants K(I,lambda1) and K(II,lambda2), respectively. The body force method is used to calculate the values of K(I,lambda1) and K(II,lambda2). In numerical analysis, basic density functions of the body forces are introduced to characterize the stress singularity at the inclusion corner. The advantages of this technique are the high accuracy of results, due to the smoothness of the unknown weight functions, and the presence of the direct relation between the values of K(I,lambda1), K(II,lambda2) and the values of unknown weight functions at the corner tip.
In order to solve the speed problem and shallow reasoning problem met in current research in fault diagnosis expert system, this paper presents a model based parallel fault diagnosis expert system for energy managemen...
It is reported that the first partial derivative of the phase distribution for a transparent object can be measured automatically by a personal computer with an image processor. The moire pattern is formed by superimp...
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There is a need for highly redundant manipulators to work in complex, cluttered environments. We explore kinematics and path planning for highly redundant, manipulators by means of a continuous manipulator model, whic...
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