scholarly journals XOR Multiplexing Technique for Nanocomputers

2020 ◽  
Vol 10 (8) ◽  
pp. 2825
Author(s):  
Lianhua Yu ◽  
Ming Diao ◽  
Xiaobo Chen ◽  
Xiaochun Cheng
Keyword(s):  
Manufacturing Process ◽  
Bifurcation Theory ◽  
Fault Tolerant ◽  
Significant Percentage ◽  
Nano Scale ◽  
Hardware Redundancy ◽  
Error Distributions ◽  
Simulation Results ◽  
Multiple Stages

In emerging nanotechnologies, due to the manufacturing process, a significant percentage of components may be faulty. In order to make systems based on unreliable nano-scale components reliable, it is necessary to design fault-tolerant architectures. This paper presents a novel fault-tolerant technique for nanocomputers, namely the XOR multiplexing technique. This hardware redundancy technique is based on a numerous duplication of faulty components. We analyze the error distributions of the XOR multiplexing unit and the error distributions of multiple stages of the XOR multiplexing system, then compare them to the NAND multiplexing unit and the NAND multiplexing multiple stages system, respectively. The simulation results show that XOR multiplexing is more reliable than NAND multiplexing. Bifurcation theory is used to analyze the fault-tolerant ability of the system and the results show that XOR multiplexing technique has a high fault-tolerant ability. Similarly to the NAND multiplexing technique, this fault-tolerant technique is a potentially effective fault tolerant technique for future nanoelectronics.

A PCA Based Fault Detection and Isolation Method for Train Locating System

2010 ◽  
Vol 20-23 ◽  
pp. 688-693
Author(s):  
Jiang Liu ◽  
Bai Gen Cai ◽  
Tao Tang ◽  
Jian Wang
Keyword(s):  
Fault Detection ◽  
Fault Tolerant ◽  
Fault Detection And Isolation ◽  
Practical Application ◽  
Isolation Method ◽  
Efficiency Factors ◽  
Simulation Results ◽  
And Performance ◽  
Locating System ◽  
Fault Detectors

Fault tolerance is crucial to the operating safety and performance of train locating system. Based on the requirements of reliability and safety for train locating, the fault characteristics of location measuring sensors are analyzed. Based on the structure of the train locating system, the fault-tolerant design of the system is given with the location filtering module for case, in which six fault detectors are employed to determine the configuration of the module. Then a PCA based fault detection and isolation method is proposed with Hawkins T2 statistics and the corresponding control limit. By dynamically adjusting the efficiency factors, fault could be detected and isolated as prior defined isolating strategies, and then the fault tolerant performance will be guaranteed. Simulation results demonstrate the high fault tolerant ability of the proposed approach and certain practical application value.

Efficient Fault-Tolerant Event Query Algorithm in Distributed Wireless Sensor Networks

2010 ◽  
Vol 6 (1) ◽  
pp. 593849 ◽  
Author(s):  
Rongbo Zhu
Keyword(s):  
Fault Tolerant ◽  
Wireless Sensor ◽  
Correction Algorithm ◽  
Short Term ◽  
Self Evaluation ◽  
Data Query ◽  
Simulation Results ◽  
Query Algorithm ◽  
Cooperative Evaluation

To overcome the faulty data query problem to improve the accuracy of data query, an efficient fault-tolerant event query algorithm (FTEQ) is proposed, which takes the short-term and long-term spatial and temporal similarities between sensors and environment into considerations. An imprecise and missing data correction algorithm based on Kalman filter is proposed to correct fault sensing data, and a score rank algorithm also is proposed to assign each sensor an appropriate value to reflect the importance of sensors. FTEQ performs self-evaluation and cooperative evaluation schemes with its trustful r neighbor nodes to filter fault data query with the importance of sensor. Simulation results prove that FTEQ performs extremely well in terms of faulty detection rate and data query cost.

Casting Process Design and Simulation of Large Cast Steel Bracket

2019 ◽  
Vol 815 ◽  
pp. 125-130
Author(s):  
Jia Ji Xiong ◽  
Fan Lin Meng ◽  
Qing Jin Liang ◽  
Chong Cao
Keyword(s):  
Process Design ◽  
Manufacturing Process ◽  
Cast Steel ◽  
Casting Process ◽  
Casting Defects ◽  
Optimization Scheme ◽  
Sand Core ◽  
Steel Cast ◽  
Simulation Results ◽  
Filling And Solidification

The casting process design of large cast steel supports is carried out, and the special integrated sand core and forged steel cast lugs are used to simplify the cavity manufacturing process. The ProCAST software was used to simulate the casting process of the stent, simulating the filling and solidification of the casting, and predicting the occurrence of defects such as shrinkage and shrinkage of the casting. According to the simulation results, the cause of the defects is analyzed, and the casting process of the stent is optimized. The simulation results show that the optimization scheme effectively reduces the casting defects and the surface of the stent is free from defects.

The Study on Protection Algorithms in Multi-Domain Optical Networks

2010 ◽  
Vol 121-122 ◽  
pp. 693-698
Author(s):  
Xue Yong Li ◽  
Guo Hong Gao ◽  
Guo Yi Miao ◽  
Shi Tao Yan
Keyword(s):  
Optical Networks ◽  
Fault Tolerant ◽  
Auxiliary Graph ◽  
Simulation Results ◽  
Better Than

This paper proposes two protection algorithms SBP and PBP with the waveband grouping in fault-tolerant multi-domain optical networks. We also present the concept of layered auxiliary graph to achieve the multi-domain waveband grouping. Simulation results show that PBP performed better than SBP.

A Fault-Tolerant Routing Algorithm Using Tunnels in Fault Blocks for Network-on-Chip

2017 ◽  
Vol 27 (02) ◽  
pp. 1850022 ◽  
Author(s):  
Ling Wang ◽  
Terrence Mak
Keyword(s):  
Fault Tolerant ◽  
Routing Algorithm ◽  
Network On Chip ◽  
Mesh Network ◽  
Communication Performance ◽  
Simulation Results ◽  
On Chip

In 2D mesh Network on Chips (NoCs), fault-tolerant algorithms usually deactivate healthy nodes to form rectangular or convex fault blocks. However, the deactivated nodes can possibly form an available tunnel in a faulty block. We propose a method to discover these tunnels, and propose a fault-tolerant routing algorithm to route messages through such paths such that the overall communication performance is improved. In addition, the algorithm is deadlock-free by prohibiting some turns. Simulation results demonstrate that the reuse of the sacrificed nodes in fault blocks can significantly reduce the average message latency.

scholarly journals System Control In Fault And Normal Conditions Case Study - Quanser SRV-02

2015 ◽  
Vol 67 (1) ◽  
pp. 133-138
Author(s):  
Ionut Cristian Resceanu ◽  
Cristina Floriana Resceanu
Keyword(s):  
Fault Tolerance ◽  
Theoretical Analysis ◽  
Control Method ◽  
Fault Tolerant ◽  
Fault Tolerant Control ◽  
Control Law ◽  
System Control ◽  
Sensor Fault ◽  
Simulation Results

Abstract A fault tolerant control method is proposed for Quanser SRV-02 System in order to maintain the required performance in the presence of sensor failures. The proposed approach integrates control law and a sensor fault tolerance schema. Theoretical analysis and simulation results have confirmed the effectiveness of the proposed method.

scholarly journals Sensorless Control of a Fault Tolerant PMSM Drives in Case of Single-Phase Open Circuit Fault

2016 ◽  
Vol 7 (4) ◽  
pp. 1061
Author(s):  
Kamel Saleh ◽  
Mark Sumner
Keyword(s):  
Control Strategy ◽  
System Performance ◽  
Single Phase ◽  
Fault Tolerant ◽  
Sensorless Control ◽  
Fault Tolerant Control ◽  
Performance Degradation ◽  
Open Circuit ◽  
Phase Inverter ◽  
Simulation Results

This paper introduces a sensorless-speed-controlled PMSM motor fed by a four-leg inverter in case of a single phase open circuit fault regardless in which phase is the fault. To minimize the system performance degradation due to a single phase open circuit fault, a fault tolerant control strategy that includes taking appropriate actions to control the two remaining healthy currents is used in addition to use the fourth leg of the inverter.  Tracking the saliency is done through measuring the dynamic current responses of the healthy phases of the PMSM motor due the IGBT switching actions using the fundamental PWM method without introducing any modification to the operation of the fourth leg of the inverter. Simulation results are provided to verify the effectiveness of the proposed strategy for sensorless controlling of a PMSM motor driven by a fault-tolerant four-phase inverter over a wide speed ranges under the case of a single phase open circuit.

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