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A cost-efficient framework for executing life-time dependability procedures is presented in this paper. The proposed framework relies on distributed sensors and actuators (embedded instruments) for self-awareness and adaptation, where the IEEE 1687 standard (iJTAG) is utilized for the dependability communications and the on-chip access of the instruments.
In the context of underground cavern facilities, electrical power substation is now located underground instead of the conventional aboveground. The operating environment of power system has therefore changed, which may directly degrade the heat dissipation capability of the power system. A condition monitoring and reliability analysis of power facilities for underground substations in high humidity,...
Deformation is typically estimated by comparing scans of terrestrial laser scanner (TLS) over the same area but at different time instants. However, such a method can only estimate the difference between two successive surveys, which may be caused by instrumental error and registration error instead of the real deformation, affecting the reliability of deformation monitoring. In order to improve the...
In an effort to evaluate the effectiveness of an audience response system (ARS), a mixed methods approach was developed using qualitative and quantitative questionnaire data together with direct measures such as exam and ARS performance scores. The results reveal that students' exam scores are higher for those students who answer ARS questions and that ARS performance scores are an indicator of how...
The Smart Grid resilience in power systems could be improved thanks to remote monitoring of civil structures existing at concrete and earth-filled dams, which indicates any atypical behavior of these structures. Among the various sensors and transducers used, the direct and inverted pendulums present an additional challenge. These instruments are widely used in hydroelectric reservoirs to monitor...
The main source of Brazilian health information comes from health information systems. Consequently, in order to obtain a reliable and secure information from this health system the data quality insurance are an essential step. This paper presents the QUALISIS-BR, an approach to guide the improvement of the quality in health information systems. This approach were conducted in a well-known Brazilian...
Conventional NDT is a mature technology, for which there is a significant instrumentation and services market expected to reach $6.88B by 2020. NDT is seeking to become more quantitative and leverage advances in instrumentation. In addition aspects of the field are undergoing significant transition as new materials and advanced manufacturing are seeing increased usage. The landscape is further changing...
Cement industry worldwide, has now started realizing the importance of Process Control and Automation in achieving trouble free continuous operation leading to improved productivity and energy efficiency. Automation also takes care of optimal operation in mining and hence longer life of mines and consistent desired cement quality is assured. Instrumentation and control logic can also be used effectively...
Proper maintenance of small hydropower (SHP) stations is required to extend equipment life time, or at least the mean time to the next failure. While too little or improper maintenance may have very costly consequences, maintenance, too, incurs expenditures and it may not be economical to perform it frequently. Net profit can be increased by reducing maintenance costs, while accurate maintenance actions...
Robustness and reliability are essential requirements of today's embedded systems. Especially errors in the control flow of a program, e.g. caused by transient errors, may lead to a faulty system behavior potentially with catastrophic consequences. Several methods for control flow checking have been proposed during the last decades. However, these techniques mostly focus on a correct sequence of application...
The paper presents a ‘Seven Stage Warm Redundant Structured’ (SeSWRS) hydrogen cooling system (HCS) for generators cooling in a typical thermal power station. The proposed system is equally reliable for steam and gas turbine based generating sections. System reliability of the proposed SeSWRS model is evaluated using MATLAB. The process control and instrumentation of the system is designed and simulated...
The sensor network testbeds available today rely on a communication channel different from the mote radio - a backchannel - to facilitate mote reprogramming, health monitoring and performance analysis. Such backchannels are either supported as wired communication channels (USB or Ethernet), or via an extra board coupled to the mote under test and thus introduce significant constraint on the testbed...
A model is presented for times during a space mission that specified solar proton flux levels are exceeded. This includes both total time and continuous time periods during missions. Results for the solar maximum and solar minimum phases of the solar cycle are presented and compared for a broad range of proton energies and shielding levels. This type of approach is more amenable to reliability analysis...
As a modern security design, Inherent Safety means that equipment and facilities is able to contain the inherent fundamental features to prevent accidents. Mine hoist is the most important equipment in the coal production. How to achieve safe, reliable, efficient production, has been the focus study at home and abroad. Inherent safety is reflected in hoist design, primarily through the design measures...
The design of Control Room in Nuclear Power Plants (NPPs) ensures that the operator is informed with accurate, complete and timely status of the plant equipment and applicable systems, notwithstanding the means for operating the plant safely under all Design Basis Events. The Control Room panels consist of several components arranged in a sequential fashion that are helpful in monitoring and control...
Advent of VLSI technology has paved the way for Programmable Logic Devices (PLD), which are widely used as the basic building blocks in high integrity electronic systems. PLDs are considered for their robust features such as high gate density, performance, speed etc. For PFBR Instrumentation and Control systems, PLDs are extensively used to implement digital designs such as VME bus interface logic,...
This paper presents the tasks and insights of Level-1 PSA of Rajasthan Atomic Power Station, RAPS-2 viz. Initiating Events, Event Tree Analysis, Data Analysis and Quality Assurance program. This also brings out the strengths in design and operating experiences of the oldest IPHWR. The PSA has been carried out with plant specific data to gain insights to the overall safety of the plant. In the present...
The vibration test of the 4LZ-2 combine harvester is carried out on the location of the driver room. The main causes of the mechanical vibration and the maximum value of the vibration are determined. The anti-vibration test of the grain lost monitor is made. On above basis the anti-vibration performance of the monitor is studied and the monitor is redesigned. The reliability of the monitor is greatly...
In the large-scale area lighting device collaboration system, because of the exclusivity of lighting device control, it is unavoidable to generate lighting device conflict when there are multi-tasks concurrently execute. This paper presents a lighting device conflict detection mechanism in the large-scale area lighting device collaboration system. Aiming the characteristic of multilevel device operation,...
We propose a new approach, namely Optimized Embedded Signature Monitoring (OESM) to perform on-line control-flow fault detection. The underlined advantage of this approach is the ability to perform a profiling algorithm that analyses the control-flow graph of user program in order to optimize the number of checkpoints (i.e., signatures) to be inserted along with the application code. By optimization,...
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