Academic literature on the topic 'Modular redundancy principle'
Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles
Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'Modular redundancy principle.'
Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.
You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.
Journal articles on the topic "Modular redundancy principle"
1
Arifeen, Tooba, Abdus Hassan, and Jeong-A. Lee. "A Fault Tolerant Voter for Approximate Triple Modular Redundancy." Electronics 8, no. 3 (2019): 332. http://dx.doi.org/10.3390/electronics8030332.
Full textAbstract:
Approximate Triple Modular Redundancy has been proposed in the literature to overcome the area overhead issue of Triple Modular Redundancy (TMR). The outcome of TMR/Approximate TMR modules serves as the voter input to produce the final output of a system. Because the working principle of Approximate TMR conditionally allows one of the approximate modules to differ from the original circuit, it is critical for Approximate TMR that a voter not only be tolerant toward its internal faults but also toward faults that occur at the voter inputs. Herein, we present a novel compact voter for Approximate TMR using pass transistors and quadded transistor level redundancy to achieve a higher fault masking. The design also targets a better Quality of Circuit (QoC), a new metric which we have proposed for highlighting the ability of a circuit to fully mask all possible internal faults for an input vector. Comparing the fault masking features with those of existing works, the proposed voter delivered upto 45.1%, 62.5%, 26.6% improvement in Fault Masking Ratio (FMR), QoC, and reliability, respectively. With respect to the electrical characteristics, our proposed voter can achieve an improvement of up to 50% and 56% in terms of the transistor count and power delay product, respectively.
2
Shi, Yong, and Zhuoyi Xu. "Wide Load Range ZVS Three-level DC-DC Converter: Modular Structure, Redundancy Ability, and Reduced Filters Size." Energies 12, no. 18 (2019): 3537. http://dx.doi.org/10.3390/en12183537.
Full textAbstract:
In future dc distributed power systems, high performance high voltage dc-dc converters with redundancy ability are welcome. However, most existing high voltage dc-dc converters do not have redundancy ability. To solve this problem, a wide load range zero-voltage switching (ZVS) three-level (TL) dc-dc converter is proposed, which has some definitely good features. The primary switches have reduced voltage stress, which is only Vin/2. Moreover, no extra clamping component is needed, which results simple primary structure. Redundancy ability can be obtained by both primary and secondary sides, which means high system reliability. With proper designing of magnetizing inductance, all primary switches can obtain ZVS down to 0 output current, and in addition, the added conduction loss can be neglected. TL voltage waveform before the output inductor is obtained, which leads small volume of the output filter. Four secondary MOSFETs can be switched in zero-current switching (ZCS) condition over wide load range. Finally, both the primary and secondary power stages are modular architecture, which permits realizing any given system specifications by low voltage, standardized power modules. The operation principle, soft switching characteristics are presented in this paper, and the experimental results from a 1 kW prototype are also provided to validate the proposed converter.
3
Klochan, A., P. Dyachenko, Yu. Bozhok, H. Al-Ammori, and I. Zhykhariev. "OPTIMIZATION OF INFORMATION BACKUP OF DATA PROTECTION SYSTEMS." SCIENTIFIC-DISCUSSION, no. 100 (May 15, 2025): 41–46. https://doi.org/10.5281/zenodo.15427386.
Full textAbstract:
For data protection systems, the issue of ensuring high reliability of incoming and outgoing data is very important. To increase data reliability, a method of parallel information backup can be used, which significantly reduces the likelihood of not detecting a situation and has little effect on reducing the likelihood of a false alarm. The application of the principles of majority logic makes it possible to reduce the probability of false alarms, but at the same time, it is necessary to increase the number of parallel channels, which is associated with economic constraints. In the future, the development of the method of parallel information redundancy using the nested modules method will make it possible to create simple, technically reliable, cost-effective, highly informative systems with high reliability of monitored data. The proposed method of nested information redundancy is a very effective method of building integrated automated decision support systems.
4
Bakay, B. Ya, and V. M. Hobela. "Formation of parameters of elements of hoisting and transport machines of manipulator type at the design stage." Forestry, Forest, Paper and Woodworking Industry 44 (December 30, 2018): 64–71. http://dx.doi.org/10.36930/42184409.
Full textAbstract:
Techniques and principles of designing loading machines of manipulator type are diverse and complex. Modern methods of designing loading machines and their individual elements are implemented on the basis of analysis of the technological process in which they are expected to operate. Also, to reduce the cost and reduce the time of design, manufacture and implementation of special purpose loading machines, increase their maintainability and facilitate the acquisition of many domestic and foreign companies began to use unit-modular design. This approach allows to divide the loading machines of the manipulator type into simpler functional elements, the pliability of which is easy to determine by the methods of the theory of resistance of materials. To transition from the pliability of such individual elements to the pliability of loading machines in general, use the matrix of transmission relations obtained in the process of force analysis and calculation of elements for accuracy. The aggregate-modular principle can be one of the main principles of realization of loading machines of manipulator type. This principle makes it possible, given the limited number of normalized elements to create a specialized design of the loading machine, which best meets the requirements of a particular technological task and there is no redundancy. This approach in each case allows to reduce the time of development and design of specialized hoisting machines of the manipulator type, increase reliability due to the durability of the elements included in it, reduce the cost of production by reducing the range of parts and components. It is offered to carry out formation of constructive parameters of elements of loading machines of manipulator type at a design stage by carrying out the power analysis and calculation of elements on accuracy. This improves the known design solutions, making them more suitable for practical application.
5
Zhadnov, V. V. "Assessing the sufficiency indicators of a set of spare parts, tools and accessories for uninterruptible power supplies of a data centre using data sheet specifications." Dependability 22, no. 3 (2022): 11–20. http://dx.doi.org/10.21683/1729-2646-2022-22-3-11-20.
Full textAbstract:
Aim. To suggest a method of estimating the parameters of a set of spare parts, tools and accessories (SPTA) according to data sheet specifications for industrial uninterruptible powers supplies (UPS) of data centres using state-of-the-art techniques. Methods. The paper uses methods of the dependability theory, the Markov process theory and the optimisation method. Results. Using the suggested approach, the stages of parametric synthesis of an SPTA kit were defined for mainline modular UPS that feature redundancy with repair and limited SPTA. For each stage, the application of mathematical models required for calculating the dependability characteristics and parameters of power module components based on UPS dependability indicators is substantiated along with the mathematical models that associate the sufficiency indicators of an SPTA kit with its parameters. Those models allow calculating the failure and recovery rates of UPS power modules, as well as the mean time to failure and restoration based on the data sheet specifications of reliability, maintainability and availability. In turn, the obtained dependability characteristics are the input data for calculating the SPTA sufficiency values (average delay in meeting a request). Using the value of average delay in meeting a request with an SPTA kit as a criterion for the mean time to power module restoration allows suggesting that it is, in principle, possible to ensure the specified dependability indicators in the course of its operation, and, therefore, such UPS can be used. Should the latter be possible, then using the value of average delay in meeting a request as a restriction, while taking into account the restrictions on the initial SPTA inventory, will allow synthesising the SPTA kit (select a replenishment strategy and define its parameters (delivery time, etc.). Comparing the logistical capabilities and the resulting data for the selected replenishment strategy will allow making a final conclusion regarding the capability to maintain the specified UPS dependability characteristics throughout the operation period. Using the above method, the parameters were synthesised of a single kit of spare parts, tools and accessories, using the Protect 3.M UPS as an example. Conclusion. The approach suggested in the paper allows estimating both the general feasibility of ensuring the specified dependability, and the economic expediency of using industrial mainline modular UPS with redundancy and recovery. Additionally, if ensuring the UPS dependability is possible, but the operating costs of its maintenance are unacceptable, the possibility of reducing the number of repair teams (reducing the cost of their deployment) and/or using more efficient redundancy methods (mixed redundancy, mixed redundancy with rotation, etc.) should be evaluated. However, it should be taken into consideration that the proposed approach based on the use of mathematical models does not guarantee a 100% accuracy of SPTA parameter estimation, as the mathematical models that it uses, like any other models, have a limited accuracy and the results obtained with their help require experimental confirmation by means of testing or controlled operation.
6
Burgas, Llorenç, Joaquim Melendez, Joan Colomer, Joaquim Massana, and Carles Pous. "N-dimensional extension of unfold-PCA for granular systems monitoring." Engineering Applications of Artificial Intelligence 71 (May 1, 2018): 113–24. https://doi.org/10.1016/j.engappai.2018.02.013.
Full textAbstract:
This work is focused on the data based modelling and monitoring of a family of modular systems that have multiple replicated structures with the same nominal variables and show temporal behaviour with certain periodicity. These characteristics are present in many systems in numerous fields such as the construction or energy sector or in industry. The challenge for these systems is to be able to exploit the redundancy in both time and the physical structure. In this paper the authors present a method for representing such granular systems using N-dimensional data arrays which are then transformed into the suitable 2-dimensional matrices required to perform statistical processing. Here, the focus is on pre-processing data using a non-unique folding–unfolding algorithm in a way that allows for different statistical models to be built in accordance with the monitoring requirements selected. Principal Component Analysis (PCA) is assumed as the underlying principle to carry out the monitoring. Thus, the method extends the Unfold Principal Component Analysis (Unfold-PCA or Multiway PCA), applied to 3D arrays, to deal with N-dimensional matrices. However, this method is general enough to be applied in other multivariate monitoring strategies. Two of examples in the area of energy efficiency illustrate the application of the method for modelling. Both examples illustrate how when a unique data-set folded and unfolded in different ways, it offers different modelling capabilities. Moreover, one of the examples is extended to exploit real data. In this case, real data collected over a two-year period from a multi-housing social-building located in down town Barcelona (Catalonia) has been used.
7
Efanov, D. V. "Fault-tolerant Structures of Digital Devices Based on Boolean Complement with the Calculations Checking by Sum Codes." Èlektronnoe modelirovanie 43, no. 5 (2021): 21–42. http://dx.doi.org/10.15407/emodel.43.05.021.
Full textAbstract:
The article considers the construction of fault-tolerant digital devices and computing systems that does not use the principles of introducing modular redundancy. To correct the signals, a special distorted signal fixation unit, concurrent error-detection by the pre-selected redundant code circuit, as well as a signal correction block are used. The distorted signal fixation unit is implemented by the Boolean complement method, which makes it possible to design a large number of such blocks with different indicators of technical implementation complexity. When synthesizing a fault-tolerant device according to the proposed method, it is possible to organize a concurrent error-detection circuit for both the source device and the Boolean complement block in the structure of the distorted signal fixation unit. This makes it possible to choose among the variety of ways to implement fault-tolerant devices according to the proposed method, one that gives a device with the least structural redundancy. Various redundant codes can be used to organize concurrent error-detection circuits, including classical and modified sum codes. The author provides algorithms for the synthesis of distorted signal fixation unit and the Boolean complement block. The results of experimental researches with combinational benchmarks devices from the well-known LG’91 and MCNC Benchmarks sets are highlighted. The article presents the possibilities of the considered method for the organization of faulttolerant digital devices and computing systems.
8
Букирёв, А. С., А. Ю. Савченко, М. И. Яцечко, and В. А. Малышев. "Diagnostic system for the technical condition of the aircraft avionics complex based on intelligent information technologies." МОДЕЛИРОВАНИЕ, ОПТИМИЗАЦИЯ И ИНФОРМАЦИОННЫЕ ТЕХНОЛОГИИ 8, no. 1(28) (2020): 10–11. http://dx.doi.org/10.26102/2310-6018/2020.28.1.010.
Full textAbstract:
Предложен подход к построению системы диагностики технического состояния комплекса бортового оборудования воздушного судна на основе интеллектуальных информационных технологий с целью обеспечения безопасности полетов. Разработана интеллектуальная диагностическая система и решена задача диагностики технического состояния объектов, выполняющих информационные преобразования сигналов. Обоснована возможность управления избыточностью в комплексе бортового оборудования с помощью интеллектуальной диагностической системы. Принцип построения такой системы реализуется в интересах решения задачи автоматического построения диагностической модели объекта диагностирования за счет применения методов искусственного интеллекта. Это позволяет реализовать в виде программного обеспечения унифицированную (инвариантную к различным объектам) интеллектуальную диагностическую систему в комплексе бортового оборудования, построенном по принципу интегрированной модульной авионики. В свою очередь, важной особенностью реализации и применения интеллектуальной диагностической системы является возможность функционирования (обучения) и выполнения задачи по предназначению (диагностика технического состояния) в режиме реального масштаба времени. Процесс обучения интеллектуальной диагностической системы может осуществляться двумя основными способами: обучение с учителем (является наиболее актуальным в процессе испытания объекта авиационной техники на надежность), а также обучение без учителя (является полностью автономным способом, наиболее актуальным в процессе испытаний объекта контроля или применения по назначению). В процессе испытания объекта контроля на надежность интеллектуальная диагностическая система позволит сформировать интеллектуальную базу данных моделей исходного (правильного) функционирования объекта контроля комплекса бортового оборудования с последующим распознаванием предотказных состояний и их классификацией (кластеризацией). Proposed Approach to the construction of a diagnostic system for the technical condition of the aircraft avionics complex based on intelligent information technologies in order to ensure flight safety is proposed. An intelligent diagnostic system is developed and the problem of diagnosing the technical condition of objects performing information signal transformations is solved. The possibility of managing redundancy in the complex of on-board equipment using an intelligent diagnostic system is justified. The principle of constructing such a system is implemented in the interests of solving the problem of automatically constructing a diagnostic model of the diagnostic object through the use of artificial intelligence methods. This allows you to implement in the form of software a unified (invariant to various objects) intelligent diagnostic system in the on-board equipment complex, built on the principle of integrated modular avionics. In turn, an important feature of the implementation and application of an intelligent diagnostic system is the possibility of functioning (training) and completing a task for its intended purpose (diagnostics of a technical condition) in real time. The learning process of an intelligent diagnostic system can be carried out in two main ways: training with a teacher (which is most relevant in the process of testing an object of aviation equipment for reliability), and training without a teacher (is a completely autonomous way, most relevant in the process of testing an object of control or intended use ) In the process of testing the object of control for reliability, an intelligent diagnostic system will form an intelligent database of models of the initial (correct) functioning of the object of control of the complex of on-board equipment with subsequent recognition of precautionary states and their classification (clustering).
9
Aparakin, Аnton. "Modular-Parametric Principle of Design Development of Gear Hydraulic Machines." Central Ukrainian Scientific Bulletin. Technical Sciences 2, no. 7(38) (2023): 51–58. http://dx.doi.org/10.32515/2664-262x.2023.7(38).2.51-58.
Full textAbstract:
The conventional system of design development of gear-type hydraulic machines and their implementation is not sufficiently perfect for a number of reasons. This system cannot be effective in the conditions of large-scale production. The purpose of the work is to create such a principle of designing a model range of gear hydraulic machines, which optimizes the conditions of production and marketing, with the subsequent reduction of the cost of production. To achieve the goal, the theory of "redundant connections" was used, and the design scheme of the hydraulic machine was analyzed. On the results of the conducted analysis, several possible schemes for the extraction of "redundant connections" were developed, and the calculation was carried out. From the proposed schemes, the most appropriate scheme for creating a gear-type hydraulic machine was determined - a scheme using the central load of the driving gear and a barrel-shaped profile of the longitudinal contour of the tooth of the driven gear. The paper also considers additional benefits arising from the removal of redundant connections. On the basis of the developed diagram of the action of forces in gear engagement, it is shown how deviations from the geometric accuracy of the gear affect the operation of the hydraulic machine and why the proposed scheme with a barrel-shaped profile of the longitudinal contour of the tooth is more appropriate. Among the important results of the research should be attributed the synthesized perspective scheme of design of a gear hydraulic machine. The use of the proposed scheme will allow the reduction of redundant connections (from 7 to 5, relative to the conventional scheme), which will contribute to the reduction of additional deformations and energy losses when working in the hydraulic motor mode and fluid losses when working in the hydraulic pump mode. And the implementation of one of the coupled gears with a barrel-shaped longitudinal profile of the teeth will ensure the stabilization of the displacement moment when the unit is operating in the hydraulic motor mode and will stabilize the hydraulic efficiency parameter when operating in the pump mode.
10
Kalmykov, Igor Anatolyevich, Vladimir Petrovich Pashintsev, Kamil Talyatovich Tyncherov, Aleksandr Anatolyevich Olenev, and Nikita Konstantinovich Chistousov. "Error-Correction Coding Using Polynomial Residue Number System." Applied Sciences 12, no. 7 (2022): 3365. http://dx.doi.org/10.3390/app12073365.
Full textAbstract:
There has been a tendency to use the theory of finite Galois fields, or GF(2n), in cryptographic ciphers (AES, Kuznyechik) and digital signal processing (DSP) systems. It is advisable to use modular codes of the polynomial residue number system (PRNS). Modular codes of PRNS are arithmetic codes in which addition, subtraction and multiplication operations are performed in parallel on the bases of the code, which are irreducible polynomials. In this case, the operands are small-bit residues. However, the independence of calculations on the bases of the code and the lack of data exchange between the residues can serve as the basis for constructing codes of PRNS capable of detecting and correcting errors that occur during calculations. The article will consider the principles of constructing redundant codes of the polynomial residue number system. The results of the study of codes of PRNS with minimal redundancy are presented. It is shown that these codes are only able to detect an error in the code combination of PRNS. It is proposed to use two control bases, the use of which allows us to correct an error in any residue of the code combination, in order to increase the error-correction abilities of the code of the polynomial residue number system. Therefore, the development of an algorithm for detecting and correcting errors in the code of the polynomial residue number system, which allows for performing this procedure based on modular operations that are effectively implemented in codes of PRNS, is an urgent task.
Books on the topic "Modular redundancy principle"
1
Zerilli, John. The Adaptable Mind. Oxford University Press, 2021. http://dx.doi.org/10.1093/oso/9780190067885.001.0001.
Full textAbstract:
What conception of mental architecture can survive the evidence of neuroplasticity and neural reuse in the human brain? In particular, what sorts of modules are compatible with this evidence? This book shows how developmental and adult neuroplasticity, as well as evidence of pervasive neural reuse, force a revision to the standard conceptions of modularity and spell the end of a hardwired and dedicated language module. It argues from principles of both neural reuse and neural redundancy that language is facilitated by a composite of modules (or module-like entities), few if any of which are likely to be linguistically special, and that neuroplasticity provides evidence that (in key respects and to an appreciable extent) few if any of them ought to be considered developmentally robust, though their development does seem to be constrained by features intrinsic to particular regions of cortex (manifesting as domain-specific predispositions or acquisition biases). In the course of doing so, the book articulates a schematically and neurobiologically precise framework for understanding modules and their supramodular interactions.
Book chapters on the topic "Modular redundancy principle"
1
Yuhara, Ichiro. "Chapter 11. Revisiting Poser’s (1992) “Blocking of phrasal constructions by lexical items” from the perspective of the economy of language use principle." In Linguistik Aktuell/Linguistics Today. John Benjamins Publishing Company, 2024. http://dx.doi.org/10.1075/la.284.11yuh.
Full textAbstract:
Poser (1992) is an important paper that points out that blocking applies not only to synonyms but also to synonymous phrases, using Japanese examples. This chapter aims to update his discussion and proposal using Ueno’s (2014) “economy of language use” principle requiring to choose a structurally simpler expression when there are two semantically rivaling expressions. Considering the significance of two semantically similar but formally non-identical representations co-existing redundantly, this chapter also puts forth Sadock’s (2012) multi-modular grammar as a model that embodies the idea that grammar is competition.
2
Burton, Philip J. "Enhancing General Resilience in Forests." In Resilient Forest Management. Oxford University PressOxford, 2025. https://doi.org/10.1093/oso/9780198832997.003.0005.
Full textAbstract:
Abstract General principles explaining resilience in complex adaptive systems can be applied to the management of forest ecosystems and to forest management policies and enterprises. Promoting diversity at all levels is a key strategy, with resilience variously promoted through mechanisms such as functional redundancy, dilution effects, spatial disruption, and higher-level ecosystem effects. Risk and uncertainly can be buffered through preparedness, contingency planning, and the implementation of reserves, maintaining sufficient capacity and flexibility to cope with disruptions. The “Precautionary Principle” has wide applications, with the long-term benefits of conservation generally preferable to any short benefits of overexploitation of resources, especially under conditions of uncertainty. Maintaining a modular structure facilitates responsive place-specific planning and isolation from contagious threats. Modularity, however, must be balanced with the networking benefits of connectedness, especially important for information exchange and response to local disruptions. Broadly scoped situational awareness, both internally and externally focused, is important in order to guide management responses as part of an overall program of adaptive management.
3
West-Eberhard, Mary Jane. "Principles of Development and Evolution." In Developmental Plasticity and Evolution. Oxford University Press, 2003. http://dx.doi.org/10.1093/oso/9780195122343.003.0012.
Full textAbstract:
So far, I have outlined the general properties of phenotypes, shown how they relate to development, and presented a model of adaptive evolution based on established principles of development and genetics. Now, using this general framework, I can summarize how developmental plasticity facilitates evolution. Jacob (1977) characterized evolution as “tinkering.” It shuffles and recombines what is already there. Frazzetta (1975), in another felicitous comparison with machines, wrote that evolution manages “the gradual improvement of a machine while it is running” (p. 20). Both of these qualities are possible due to characteristics of phenotypes that are not shared with most machines. Tinkering works because the phenotype is made of recombinable modular components that can be turned off and on in different conditions and can function in more than one context, what Gerhart and Kirshner (1997; Kirschner and Gerhart, 1998) call “weak linkage” to any particular use. Improvement without disruption of function works because of the remarkable active flexibility, and redundancy, in the development of parts. As a result of these two qualities—modularity and plasticity—an organism has the unmachinelike ability to respond to a new situation or to a new gene with the production of a new trait, and then to multiply, through reproduction, the ability to produce this trait. Differential reproduction starts the cycle of variation, selection, and cross-generational change that we call evolution—the most unmachinelike process of all. Many reasons have been given to believe that evolutionary change is difficult and even resisted in a well-adapted population (see chapter 1). The evolution of a novel specialization requires that a single lineage persist while undergoing extensive change. The conditions sometimes mentioned as favoring directional evolution, such as strong competition, very different or changing environments, small founder populations, or very long periods of time (see Mayr, 1982b), also favor population extinction. The idea of developmental cohesiveness, outlined in chapter 1, led to the further belief that major developmental change early in ontogeny would be disruptive. The cohesiveness theme persists even though it long has been clear that innovation does not occur exclusively by terminal addition (see chapter 1).
4
Prokosch, Hans-Ulrich, Ronny Baber, Paula Bollmann, Marie Gebhardt, Julian Gruendner, and Michael Hummel. "Aligning Biobanks and Data Integration Centers Efficiently (ABIDE_MI)." In Studies in Health Technology and Informatics. IOS Press, 2022. http://dx.doi.org/10.3233/shti220317.
Full textAbstract:
ABIDE_MI is a complementary funded 18 months project within the German Medical Informatics Initiative (MII), which aims to align IT infrastructures and regulatory/governance structures between biobanks/biobanking IT and the MII data integration centres (DIC) at German university hospitals. A major task in 2021 was the systematic collection of all documents describing rules, as well as proposal/contract templates for data and biosample use and access at each of the participating 24 university hospitals and their comparison with MII-wide consented data sharing principles, documents and governance structures. This comparison revealed large heterogeneity across the ABIDE_MI sites and further, redundant structures/regulations currently established at the German university hospitals. A second task was the design and stepwise development of an IT network infrastructure with central components (data and biosample query portal) and decentralized standardized FHIR servers to capture the standardized FHIR-based core data set modules (resources) defined within the MII working group “Interoperability”. Subsequent steps in the project are the harmonization of the data and biosample sharing governance/regulation frameworks at each ABIDE_MI site, creating synergies for the research infrastructures at the German university hospitals and to link those resources to the German Portal for Medical Research Data and with the BBMRI-ERIC Directory and Negotiator tools.
Conference papers on the topic "Modular redundancy principle"
1
Labenda, Patrick, Marc Neumann, and Tim Sadek. "Wheeled, Kinematically Redundant Locomotion System for Mobility-Oriented Research and Experimentation." In ASME 2011 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2011. http://dx.doi.org/10.1115/detc2011-47194.
Full textAbstract:
Mobile robots for inspection and surveillance of hard-to-reach and hazardous areas e.g. resulting from a building collapse in the course of a natural or man-made catastrophe have to possess enhanced rough terrain mobility capabilities. First, they must be able to navigate through a given environment and to avoid insurmountable obstacles. Second, they must have the ability to traverse different forms of ground without getting immobilized by a loss of traction. Third, they must be able to negotiate a wide spectrum of obstacles including e.g. wide gaps and high steps. These abilities can be described as a mobile robots performance indices “maneuverability”, “trafficability” and “terrainability”. As a consequence, mobile robot concepts for disaster control and search-and-rescue tasks always have to be developed and evaluated with regard to these performance indices. In principle, considerable potentials with regard to mobility in unstructured and rough environments offer kinematically redundant locomotion systems equipped with powered wheels or tracks which are inspired by their biological archetype snake. These potentials are based on the systems’ snake-like; modular design as well as their given kinematic redundancy. Due to their slender, modular and flexible design the systems are basically able to travel and maneuver through noticeable narrow passes and tunnels. Further on, their kinematic redundancy can be used for a purposeful posture and terrain adaptation to safeguard traction and the system’s trafficability, respectively. Finally, the systems’ modular and articulated design, both, can be used to achieve an outstanding terrainability and to be able to negotiate remarkable obstacles. The described and expected potentials of kinematically redundant locomotion systems have to be investigated in detail as well as evaluated in practice. To be able to do so, a demonstrator has been developed and implemented for intense mobility-oriented research and experimentation. The mobile robot and first experimental results are described in the paper at hand. The system stands out especially due to an innovative sensory for slip and contact force detection.
2
Kucherov, N., M. Babenko, A. Tchernykh, V. Kuchukov, and I. Vashchenko. "Increasing reliability and fault tolerance of a secure distributed cloud storage." In The International Workshop on Information, Computation, and Control Systems for Distributed Environments. Crossref, 2020. http://dx.doi.org/10.47350/iccs-de.2020.16.
Full textAbstract:
The work develops the architecture of a multi-cloud data storage system based on the principles of modular arithmetic. This modication of the data storage system allows increasing reliability of data storage and fault tolerance of the cloud system. To increase fault-tolerance, adaptive data redistribution between available servers is applied. This is possible thanks to the introduction of additional redundancy. This model allows you to restore stored data in case of failure of one or more cloud servers. It is shown how the proposed scheme will enable you to set up reliability, redundancy, and reduce overhead costs for data storage by adapting the parameters of the residual number system.
3
Degeng, Made Duananda K., Yulias Prihatmoko, Felisia Hemilia, and Nunung Nindigraha. "Application of Redundancy Principles in the Digital Module of Learning Material Development Courses." In International Conference on Information Technology and Education (ICITE 2021). Atlantis Press, 2021. http://dx.doi.org/10.2991/assehr.k.211210.012.
Full text
4
She, Xiaoxuan, and P. K. Samudrala. "Notice of Violation of IEEE Publication Principles: Selective Triple Modular Redundancy for Single Event Upset (SEU) Mitigation." In 2009 NASA/ESA Conference on Adaptive Hardware and Systems. AHS 2009. IEEE, 2009. http://dx.doi.org/10.1109/ahs.2009.9.
Full text
5
Zatsarinny, Aleksandr, Yuri Stepchenkov, Yuri Diachenko, and Yuri Rogdestvenski. "FAILURE TOLERANT SYNCHRONOUS AND SELT-TIED CIRCUITS COMPARISON." In Mathematical modeling in materials science of electronic component. LCC MAKS Press, 2021. http://dx.doi.org/10.29003/m2498.mmmsec-2021/154-156.
Full textAbstract:
The article considers the problem of developing synchronous and self-timed (ST) digital circuits that are tolerant to soft errors. Synchronous circuits traditionally use the 2-of-3 voting principle to ensure single failure, resulting in three times the hardware costs. In ST circuits, due to dual-rail signal coding and two-phase control, even duplication provides a soft error tolerance level 2.1 to 3.5 times higher than the triple modular redundant synchronous counterpart. The development of new high-precision software simulating microelectronic failure mechanisms will provide more accurate estimates for the electronic circuits' failure tolerance
6
Sanders, M. J., H. Jeanes, S. Fray, and H. U. Arnold. "Deployment of the RASP System for Cutting a Contaminated Power Reactor Turbine Shaft." In ASME 2003 9th International Conference on Radioactive Waste Management and Environmental Remediation. ASMEDC, 2003. http://dx.doi.org/10.1115/icem2003-4860.
Full textAbstract:
A need was identified for the in-situ size reduction of large components such as glove boxes, tanks and other components. A development programme resulted in a new cutting method that could be remotely deployed for the in-situ segmentation of large components of this type. RWE NUKEM has selected RASP as acronym for this technology Remotely-Operated Advanced Segmentation Process or RASP. A review of the standard manual cutting methods highlighted a number of significant shortcomings including operative safety; high energy cutting tools generating high temperatures; spread of contamination over wide areas; risk from sharp edges and operative fatigue. The development of new technology was therefore focused on improving safety for operatives and developing an inherently safe and flexible technology, which can be used for in-situ segmentation of any large components of various sizes and configurations. Important criteria included: minimal space requirements; fast set up times for use in confined spaces or high dose areas; the ability to cut in any direction; the ability to cut virtually any material and geometry; the minimization of secondary waste and low cutting temperature so flammable materials can be cut. It was concluded that a dry low energy mechanical cutting principle, which did not require cooling, would meet these criteria. The development program produced a low energy tool that uses the principles of a reciprocating saw together with a novel operating system that applies the principles of fuzzy logic. RASP technology can be used for virtually any cutting task and is among the safest and most versatile segmentation technologies for the in-situ processing of nuclear components. After completing a test programme in which a number of metal artefacts were segmented, RASP was been set up to cut a redundant SGHWR turbine shaft into pieces to facilitate packaging. The complete turbine assembly is a large heavy item with a steel shaft of 430mm diameter. The modular RASP framework was set up to enclose the unit and the system put to work and a hoist was set up to support the cut portion of the shaft on completion of the cut. The work was completed safely and without incident.
7
Koroll, Grant W., Dennis M. Bilinsky, Randall S. Swartz, Jeff W. Harding, Michael J. Rhodes, and Randall W. Ridgway. "Decommissioning of AECL Whiteshell Laboratories." In ASME 2009 12th International Conference on Environmental Remediation and Radioactive Waste Management. ASMEDC, 2009. http://dx.doi.org/10.1115/icem2009-16311.
Full textAbstract:
Whiteshell Laboratories (WL) is a Nuclear Research and Test Establishment near Winnipeg, Canada, operated by AECL since the early 1960s and now under decommissioning. WL occupies approximately 4400 hectares of land and employed more than 1000 staff up to the late-1990s, when the closure decision was made. Nuclear facilities at WL included a research reactor, hot cell facilities and radiochemical laboratories. Programs carried out at the WL site included high level nuclear fuel waste management research, reactor safety research, nuclear materials research, accelerator technology, biophysics, and industrial radiation applications. In preparation for decommissioning, a comprehensive environmental assessment was successfully completed [1] and the Canadian Nuclear Safety Commission issued a six-year decommissioning licence for WL starting in 2003 — the first decommissioning licence issued for a Nuclear Research and Test Establishment in Canada. This paper describes the progress in this first six-year licence period. A significant development in 2006 was the establishment of the Nuclear Legacy Liabilities Program (NLLP), by the Government of Canada, to safely and cost effectively reduce, and eventually eliminate the nuclear legacy liabilities and associated risks, using sound waste management and environmental principles. The NLLP endorsed an accelerated approach to WL Decommissioning, which meant advancing the full decommissioning of buildings and facilities that had originally been planned to be decontaminated and prepared for storage-with-surveillance. As well the NLLP endorsed the construction of enabling facilities — facilities that employ modern waste handling and storage technology on a scale needed for full decommissioning of the large radiochemical laboratories and other nuclear facilities. The decommissioning work and the design and construction of enabling facilities are fully underway. Several redundant non-nuclear buildings have been removed and redundant nuclear facilities are being decontaminated and prepared for demolition. Along with decommissioning of redundant structures, site utilities are being decommissioned and reconfigured to reduce site operating costs. New waste handling and waste clearance facilities have been commissioned and a large shielded modular above ground storage (SMAGS) structure is in final design in preparation for construction in 2010. The eventual goal is full decommissioning of all facilities and infrastructure and removal of stored wastes from the site.
8
Lovland, Thor, and Trond Lokka. "Umbilical-Less Tubing Hanger Installation Controls System." In Offshore Technology Conference. OTC, 2021. http://dx.doi.org/10.4043/31142-ms.
Full textAbstract:
Abstract The umbilical-less tubing hanger running installation tool, ROCS ("Remote Operated Control System") was first introduced as an R&D project to the market in early 2020. By February 2021, it is in operation for Aker BP in the North Sea on Deepsea Nordkapp. ROCS is specifically designed to increase the robustness and efficiency of running the production tubing in the well. In a traditional operation, the Tubing Hanger Running Tool ("THRT") normally communicates topside through an umbilical. The ROCS eliminate the controls umbilical by having two methods of communication to the THRT, either acoustic or through wired pipe, preference is acoustic. This also eliminates the topside WorkOver Completion System ("WOCS"). The approximately 16meter long ROCS is also designed with a Ready To Run ("R2R") principle, where the ROCS, THRT and Tubing Hanger ("TH") is made ready on land for offshore operations, already connected and tested. The system is redundant and based on a closed loop hydraulics, powered by a subsea HPU, electrically supplied from subsea batteries. The SHPU is small in size and power consumption, capable of providing the required flow at 690bar. The control functions occur through electrically held DCV's ("Directional Control Valve") for controlling all of the required TH functions. The ROCS is capable of performing 3 operations of each TH function within the allocated deployed period. The energy required is provided between the hydraulic accumulators and batteries. Pressure balanced accumulators are included to optimize all deepwater operations. A properly sized clean reservoir is installed, interfacing the pre charged accumulators. ROCS is controlled through a modular and user-friendly topside HMI ("Human Interface Machine"), communicating acoustically or through wired pipe over any type communication protocol. The benefits include removing personnel from red zone, as well as eliminating time to clamp umbilical to the drillpipe. This significantly reduces mobilization of the system to a few hours, which also eliminates the topside deck space considerably. The running time is reduced and allows to increase speed of the drill pipe. This also reduces the risk of damaging production tubing or downhole equipment. There is no risk of downtime due to damaged conduit and the operating weather window is increased.