• Title/Summary/Keyword: nonredundant

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Optimum Redundant Design by Dynamic Programming (동적계획을 이용한 최적신뢰도 설계)

  • Park Tae-Hoon
    • Journal of the military operations research society of Korea
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    • v.5 no.2
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    • pp.73-80
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    • 1979
  • In military applications of equipment, it is of the utmost importance that the equipment operates without breakdown for a specified length of time. We can increase the reliability of a system by adding redundant components to the basic nonredundant system. This study introduces a dynamic programming algorithm of finding optimum redundant design that maximizes the system reliability with constraints.

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Robust Hybrid Control for Robot Manipulators (로보트 매니퓰레이터의 강인한 하이브리드 제어)

  • Koo, Keun-Mo;Myeong, Hyeon;Kim, Jong-Hwan
    • Proceedings of the KIEE Conference
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    • 1992.07a
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    • pp.344-346
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    • 1992
  • In this paper a robust hybrid control algorithm for n-link nonredundant robot manipulators is proposed. This scheme includes an estimation law for the upper bound on the uncertainty such that robust control input is updated as a function of the estimated upper bound. The uniform ultimate boundedness of the tracking error is generated by the Lyapunov based theory.

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A study on the pre-multiplier model for redundant manipulator (여유자유도를 가진 로보트의 pre-multiplier모델에 관한 연구)

  • ;;P. Chosla
    • 제어로봇시스템학회:학술대회논문집
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    • 1989.10a
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    • pp.127-130
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    • 1989
  • The redundant manipulator extends the application fields of classical nonredundant manipulators. In this paper, we propose Premultiplier Model that describes the static behavior of redundant manipulator. This model provides insight and intuition about algebra and physics related to redundant manipulators. Active operational space stiffness control of redundant manipulators is proved to be always unstable and we propose a technique, based on our methodology, to make stiffness control stable.

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Solution of the Resource Constrained Project Scheduling Problem on the Foundation of a Term-Based Approach (Term-Based Approach를 기초로한 자원제한프로젝트스케줄링 문제의 해결)

  • Kim, Pok-Son
    • Journal of the Korean Institute of Intelligent Systems
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    • v.24 no.2
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    • pp.218-224
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    • 2014
  • The logic-based scheduling language RCPSV may be used to model resource-constrained project scheduling problems with variants for minimizing the project completion time. A diagram-based, nonredundant enumeration algorithm for the RCPSV-problem is proposed and the correctness of the algorithm is proved.

A study on the Design Techniques and Analysis of Fault-Tolerant Computers

  • Cho, Jai-Rip
    • Journal of Korean Society for Quality Management
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    • v.21 no.1
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    • pp.78-95
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    • 1993
  • The art of designing and analyzing fault-tolerant computers is surveyed with special emphasis on problems of analyzing the behavior of computers that have autonomous repair capability. The survey covers the following topics : (1) general issues in computer reliability, (2) fault-tolerance state relations and requirements, (3) computational hierarchy, (4) fault characteristics, (5) fault diagnosis, (6) fault-tolerance schemes for logic network and machines, (7) fault-coverage effects, and (8) fault-tree analysis of coverage. This paper does not include techniques for verifying nonredundant hardware or system software designs or for verifying the correctness of application programs.

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Structure, Modified Scaled Quantum Mechanical Force Field and A Priori Prediction of Vibrational Spectra and Their Assignment and Exponential Scaling of Frequencies of Triphenylene

  • Bandyopadhyay, Indrajit
    • Bulletin of the Korean Chemical Society
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    • v.24 no.6
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    • pp.717-722
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    • 2003
  • The structure, force field and vibrational spectra of triphenylene are studied by $B3LYP/6-31G^*$(5d) level of theory. The results are compared to those of the related system, phenanthrene. The scale factors in nonredundant local coordinates obtained after fitting the DFT frequencies to the experimental numbers of phenanthrene-$d_0 and -d_{10}$ are transferred to predict the spectra and assignment of triphenylene for in-plane modes. The frequencies based on scaling methodology due to Lee et al. are also obtained. These frequencies are compared with the predicted numbers based on scale factors from phenanthrene. Probable assignment for out-of-plane modes is proposed based on simple scaling of Scott and Radom (scale factor 0.9614) as well as by scaling methodology by Lee et al.

Robust Trajectory Planner for Obstacle and Singularity Avoisnce in a Robot Manipulator (장애물과 특이점의 회피를 위한 강인한 로봇의 궤적계획)

  • Leem, N. I.;Ahn, D. S.;Son, K.
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 1993.10a
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    • pp.593-597
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    • 1993
  • This paper introduces robust trajectory planner for obstacle and singularity avoidance in a nonresonant robot manipulator. In this work, we propose new trajectory generator in cartesian space by use of Bezier function. Also, SR-inverse is used for obstacle and singularity avoidance of nonredundant robot. This result is verified with 3-D simulator which has been developed to examine the effectiveness of the suggested method.

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RGISS: Rice (Oryza sativa L. ssp. japonica) Genome Information Service System

  • Lee, Dae-Sang;Seo, Hwa-Jung;Hahn, Jang-Ho;Kong, Eun-Bae;Park, Kie-Jung
    • Genomics & Informatics
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    • v.5 no.4
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    • pp.194-195
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    • 2007
  • We have constructed the Rice Genome Information Service System (RGISS), which is an information service system of the Oryza sativa L. ssp. japonica (rice) genome, using the released version of rice Build 3.0 pseudomolecules based on the Ensembl architecture. The nonredundant library, composed of 3,360 clones of BACs, PACs, and fosmids, was used to construct supercontigs. RGISS contains 50,717 annotated genes from GenBank, 56,161 predicted genes from FgeneSH, and information on 9,587 markers, which includes STS, SSR, and EST-based RFLP. The 20,180 ESTs sequenced by the Korea National Institute of Agricultural Biotechnology (NIAB) were aligned and mapped into 168,792 exons. By gene ontology analysis, the classified protein numbers in the rice genome were 6158, 4531, and 12,364 proteins, which were mapped to molecular function, cellular component, and biological process, respectively.

Deformation analysis of a 3-DOF parallel manipulator with one or two additional branches

  • Chen, Xiaolei;Wu, Jun;Yu, Guang;Wang, Liping
    • Advances in robotics research
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    • v.1 no.2
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    • pp.141-154
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    • 2014
  • Redundant parallel manipulators have some advantages over the nonredundant parallel manipulators. It is important to determine how many additional branches should be introduced. This paper studies whether one or two additional branches should be added to a 3-DOF parallel manipulator by comparing the flexible deformation of a 3-DOF parallel manipulator with one additional branch and that with two additional branches. The kinematic and dynamic models of the redundant parallel manipulator are derived and the flexible deformation is investigated. The flexible deformation of the manipulators with one additional branch and two branches is simulated and compared. This paper is helpful for designers to design a redundantly actuated parallel manipulator.