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This paper presents a simple method for detection of commutation instants of the extensively used low power brushless DC motors. In the proposed method the commutation signals are obtained without any phase shift circuit which is required in the conventional sensorless control methods. So the overall cost is decreased and the sensorless control is easy to be implemented. In the proposed method, instead...
The DDS (Data Distribution Service) is real-time communication middleware used for a large-scale network system. For performance evaluation of the DDS, we developed a DDS simulator on QualNet. The performance measures obtained from the DDS simulator include discovery-completion time, end-to-end message-transfer delay, the number of data messages and the user-data processing time. The DDS simulator...
The voids at the glass frit bonding interface and inside the frit layer not only provide leakage pathways to deteriorate the sealing performance, but also reduce the effective contact area of the bonding interface to decrease the bonding strength. In this research, the micro composite glass frit bonding structure with redundant bleeding frit and bonding gap controllable was designed as the model to...
Reliability is one of the most important parameters of dependability. It is addressed whenever we want reliable, available and safe systems. Indeed, reliability acts on the availability and security of systems. It must be considered throughout the overall life cycle of the product or system (design, manufacturing, operation). The objective of this communication is to build an overall approach of reliability...
This article deals with a case study of application of wireless sensor networks for control of emergency situations in an automated manufacturing. The control design approach of manufacture, which is using as self-energy production solutions and municipal utility services, is discussed. The correlation of manufacturing processes with emergency situations in critical infrastructure is taken in the...
In this work, we present a simplified successive cancellation list decoder that uses a Chase-like decoding process to achieve a six time improvement in speed compared to successive cancellation list decoding while maintaining the same error-correction performance advantage over standard successive-cancellation polar decoders. We discuss the algorithm and detail the data structures and methods used...
Network availability is an essential feature of an optical telecommunication network. Should a failure of a network component occur, be it a link or a component inside a node, network control plane must be able to detect the failure and reroute the traffic using spare components until a repair is done. Shared risk link groups (SRLGs) are used to describe a situation where seemingly unrelated logical...
In this paper, a system of coupled and interacting models for dynamic electric and thermal behavior of an electrical machine is presented. The models are specifically designed for maximum execution speed and are suitable for simulating the machine behavior over long time periods and even the entire lifetime of the machine. Nevertheless, the results proved to be remarkably accurate. Arbitrary electrical...
This paper presents a novel unified access conditioner for microgrid, providing a flexible and reliable solution for custom power supply and renewable energy sources integration. The modular multilevel converter is applied to achieve high reliability and low system cost. The dual-active-bridges are applied to obtain electrical isolation and flexible power interfaces. Detailed simulation results verified...
New architectures introduction succeeded in reducing the device performances dispersion in scaled transistors, but as a consequence the relative importance of oxide reliability increased. In this work we present original results of charged interface traps impact on bulk, FDSOI and Fin FETs performances. Traps time constants are analyzed and recoverable and permanent degradation proportions are derived...
An innovative E-simulation model based on E-experiment for misalignment fault detection and diagnosis that are commonly observed in rotating machinery systems has been proposed in this paper. Coupling misalignment is a condition where the shafts of the driver machine and driven machine are not on the same center line. Non-coaxial misalignment may be either due to the parallel misalignment or an angular...
Evaluating the performance of a computer system requires the use of representative workloads. Therefore it is customary to use recorded job traces in simulations to evaluate the performance of proposed parallel job schedulers. We argue that this practice retains unimportant attributes of the workload, at the expense of other more important attributes. Specifically, using traces in open-system simulations...
During the 2011 East Japan Great Earthquake Disaster, many people used social media such as Twitter to get important information for their lives. But, generally, social media also has bad side, that is wrong information diffusion problem. In this paper, we will propose a novel multiagent-based information diffusion model, the Agent-based Information Diffusion Model (AIDM), and evaluate it. Up to now,...
As an indispensible part of electronic equipment, the reliability of the whole system is affected by the degradation performance of power MOSFET tube. Based on geometry, material properties and boundary conditions, the repeated testing can be reduced, and the period of failure analysis can be shortened. This article is based on the finite element model of power MOSFET TO-263, electric thermal — mechanical...
To study analysis method of performance degradation during long term operation based on function simulation, accelerated degradation test was carried out on the power supply module directly, and the test data was used for reliability analysis. As the same time, accelerated degradation test was carried out on the key components in power supply circuit. The test data was injected into the functional...
On the basis of Lu's syndrome-based decoding algorithm, we propose an improved decoding algorithm for turbo product code, which has lower complexity and latency. On one hand, the proposed algorithm further reduces the computational complexity and the decoding latency by simplifying the calculation of syndrome and selecting a proper number of least reliable bits. On the other hand, this algorithm obtains...
This paper reviews many lower and upper bounds for consecutive-k-out-of-n systems presented over the last three decades. The reason is a revived interest to accurately estimate the reliability of (very) large consecutive systems, where exact calculations can be challenging. Main examples are novel nano-architectures targeting FinFETs, nano-magnetic and molecular technologies (where accurate estimations...
We evaluate a routing metric, called TXPFI, which captures the expected number of frame transmissions needed for successful delivery of data in Wireless Sensor Networks (WSNs) featuring non-fully cooperative nodes and unreliable links. The study, which addresses the exploitation of the TXPFI in routing protocols of distance-vector type, assesses the impact of different network settings on the performance...
According to the relationships among attitude error of mathematical platform, installation angle and measurement misalignment, the measurement misalignment matching algorithm is derived. In order to ensure the system works well on the condition that the mount angles of the slave INS are big, the optimal attitude matching algorithm is presented detailedly based on the measurement misalignment matching...
As an extension of binary low-density parity-check (LDPC) codes, non-binary LDPC (NB-LDPC) codes show significantly better performance when the code length is moderate or small. Recently, enhanced iterative hard reliability based (EIHRB) decoding algorithm is proposed to reduce the computation complexity. However, the EIHRB algorithm suffers a lot from significant performance degradation when the...
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