How to monitor your safety instrumented system performance

2018 ◽  
Vol 58 (2) ◽  
pp. 761
Author(s):  
Andy Yam
Keyword(s):  
System Performance ◽  
Performance Monitoring ◽  
Information Sources ◽  
Complete Solution ◽  
International Electrotechnical Commission ◽  
End User ◽  
Protection Systems ◽  
Incorrect Assumption ◽  
Plant Personnel ◽  
The Right

With the impending release of Edition 2 of the International Electrotechnical Commission (IEC) Standard 61511 in Australia, it is timely to revisit the topic of safety instrumented system (SIS) performance monitoring. Operators need to monitor the performance of their SISs to ensure that design assumptions are correct. Any incorrect assumption or error introduced during operation can result in an unsafe plant situation. Questions to consider include: how do operators know their plants are adequately protected; are protection systems performing as required, and do operators need to re-assess the safety of their plant’s process vis-à-vis the implemented safety instrumented systems; what are end-user obligations; how and is it possible to meet these obligations; and what additional requirements are there, and how much more prescriptive is Edition 2? If any of the above questions are of concern, or if plant personnel are aware of their obligation to maintain and monitor the SIS during operations but are still not 100% sure if they are on the right track or need to do more, then this paper will prove useful. In addition to knowing all the requirements to comply, actual implementation and maintenance of a program to monitor the performance of SIS can prove overwhelming. Not only do you need to be adept in maintaining a database, but you also need to understand how to consolidate various critical information sources in order to make sense of all the data collected. Fortunately, there are solutions in the market to help end-users overcome these hurdles to effectively monitor SIS performance. This paper looks at some key areas that a complete solution should cover and what some of the features of such a solution are.

CONTROL SYSTEM PERFORMANCE MONITORING: NEW DEVELOPMENTS AND PRACTICAL ISSUES

2002 ◽  
Vol 35 (1) ◽  
pp. 387-392 ◽  
Author(s):  
G.A. Dumont ◽  
L. Kammer ◽  
B.J. Allison ◽  
L. Ettaleb ◽  
A.A. Roche
Keyword(s):  
Control System ◽  
System Performance ◽  
Performance Monitoring ◽  
New Developments ◽  
System Performance Monitoring

Power Neighboring Interval Matching Based PMC Integration

2016 ◽  
Vol 25 (08) ◽  
pp. 1650086
Author(s):  
Yuelong Li ◽  
Jigang Wu ◽  
Yawen Chen ◽  
Jason Mair ◽  
David Eyers ◽  
...  
Keyword(s):  
Data Integration ◽  
Power Consumption ◽  
Power Dissipation ◽  
System Performance ◽  
Performance Monitoring ◽  
Power Estimation ◽  
Raw Data ◽  
Integration Approach ◽  
Common Task ◽  
The Status

Performance monitoring counters (PMCs) are of great value to monitor the status of processors and their further analysis and modeling. In this paper, we explore a novel problem called PMC integration, i.e., how to combine a group of PMCs which are collected asynchronously together. It is well known that, due to hardware constraints, the number of PMCs that can be measured concurrently is strictly limited. It means we cannot directly acquire all the phenomenon features that are related with the system performance. Clearly, this source raw data shortage is extremely frustrating to PMCs based analysis and modeling tasks, such as PMCs based power estimation. To deal with this problem, we introduce a neighboring interval power values based PMC data integration approach. Based on the activity similarity of easily collected power dissipation values, the proposed approach can automatically combine distinct categories of PMC data together and hence realize the recovery of intact raw PMC data. In addition, the significance and effectiveness of the proposed approach are experimentally verified on a common task, the PMCs based power consumption modeling.

scholarly journals The ElectricalVehicle Simulator for Charging Station in Mode 3 of IEC 61851-1 Standard

Energies ◽  
2019 ◽  
Vol 13 (1) ◽  
pp. 176 ◽  
Author(s):  
Mihai Rata ◽  
Gabriela Rata ◽  
Constantin Filote ◽  
Maria Simona Raboaca ◽  
Adrian Graur ◽  
...  
Keyword(s):  
Complete Solution ◽  
Transport Sector ◽  
International Electrotechnical Commission ◽  
Software Application ◽  
Charging Station ◽  
Electrical Vehicles ◽  
Mode 3 ◽  
Charging Stations ◽  
Current Device ◽  
Main Strategy

As fuel consumption in the transport sector has increased at a faster pace than in other sectors, the use of electromobility represents the main strategy adopted by the automotive industry. In this context, as the number of electrical vehicles (EVs) will increase, it will also be necessary to increase the number of charging stations. The present paper presents a complete solution for charging stations that can be located in the office or mall parking area. This solution includes a mode 3 AC charging stations of International Electrotechnical Commission (IEC) 61851-1 Standard, an EV simulator for testing the good functionality of the charging stations (i.e., communications, residual-current device (RCD) protection) and a software application used for controlling the charging process by the programmable logic controller (PLC).

Virtual Collaborative Design

2011 ◽  
pp. 482-486
Author(s):  
Aybüke Aurum ◽  
Oya Demirbilek
Keyword(s):  
Product Development ◽  
Product Design ◽  
Design Process ◽  
Collaborative Design ◽  
End Users ◽  
Domestic Product ◽  
End User ◽  
Essential Aspect ◽  
Industrial Designers ◽  
The Right

As we enter the third millennium, many organizations are forced to constantly pursue new strategies to differentiate themselves from their competitors. Examples include offering customers streams of new products and services, as well as continuously seeking to improve productivity, services and the effectiveness of product design, development and manufacturing processes. Consequently, new concepts, approaches and tools are emerging quickly as the globalization trend expands across the world. Product complexity, pressures to reduce production cycle time, the need for stakeholders’ contributions and multinational company as well as consumer requirements create the demand for sophisticated multi-designer collaborative virtual environments where product design can be shared and acted upon (Kunz, Christiansen, Cohen, Jin, & Levitt, 1998; Ragusa & Bochanek, 2001; Anderson, Esser & Interrante, 2003). Thus, researchers and practitioners recognize that collaboration is an essential aspect of contemporary, professional product design and development activities. The design process is collaborative by nature. Collaborative design fosters participation of stakeholders in any form during the design process. The design of a successful product is dependent on integrating information and experiences from a number of different knowledge domains. These domains include consumer (end-user) requirements, industrial designers’ professional design skills as well as manufacturers’ needs. This results in a product that performs at a functional as well as aesthetic level and that can be manufactured by the right process at the right price. End-user involvement is essential to product design, since products that do not achieve consumer satisfaction or meet consumer needs are doomed to fail (Schultz, 2001). Accurate understanding of user needs is an essential aspect in developing commercially successful products (Achilladelis, 1971). Hence, it is very important for industrial designers to gather the end-users’ needs and incorporate them into their designs. The involvement of manufacturers in the initial stages of the domestic product design process can lead to a dramatic reduction in a product’s development lifecycle time, also facilitating the coordination of the purchasing and engineering functions (Bochanek & Ragusa, 2001; Demirbilek, 2001). The increasing complexity of artifacts and the globalization of product development are changing research methodologies and techniques. A prime example of this includes the application of a virtual collaborative design environment (VCDE) for product design and manufacturing. This article focuses on the concept of virtual collaborative design. It describes a research effort to investigate cross-cultural collaboration in product development using online applications for domestic product design. The aim of this research is to investigate issues related to the virtual collaborative design (VCD) process, and to bring an understanding of stakeholder needs during the collaborative design process as well as to improve the relationships between end-users, designers and manufacturers. The article presents findings based on a survey study conducted with four different potential stakeholders: representatives of consumers, software designers, industrial designers and manufacturers.

“How Did I Make It?”: Uncertainty about Own Motor Performance after Inhibition of the Premotor Cortex

2016 ◽  
Vol 28 (7) ◽  
pp. 1052-1061 ◽  
Author(s):  
Nadia Bolognini ◽  
Luca Zigiotto ◽  
Maíra Izzadora Souza Carneiro ◽  
Giuseppe Vallar
Keyword(s):  
Motor Performance ◽  
Posterior Parietal Cortex ◽  
Performance Monitoring ◽  
Premotor Cortex ◽  
Motor Task ◽  
Single Pulse ◽  
Self Confidence ◽  
Cathodal Tdcs ◽  
Before And After ◽  
The Right

Optimal motor performance requires the monitoring of sensorimotor input to ensure that the motor output matches current intentions. The brain is thought to be equipped with a “comparator” system, which monitors and detects the congruence between intended and actual movement; results of such a comparison can reach awareness. This study explored in healthy participants whether the cathodal transcranial direct current stimulation (tDCS) of the right premotor cortex (PM) and right posterior parietal cortex (PPC) can disrupt performance monitoring in a skilled motor task. Before and after tDCS, participants underwent a two-digit sequence motor task; in post-tDCS session, single-pulse TMS (sTMS) was applied to the right motor cortex, contralateral to the performing hand, with the aim of interfering with motor execution. Then, participants rated on a five-item questionnaire their performance at the motor task. Cathodal tDCS of PM (but not sham or PPC tDCS) impaired the participants' ability to evaluate their motor performance reliably, making them unconfident about their judgments. Congruently with the worsened motor performance induced by sTMS, participants reported to have committed more errors after sham and PPC tDCS; such a correlation was not significant after PM tDCS. In line with current computational and neuropsychological models of motor control and awareness, the present results show that a mechanism in the PM monitors and compares intended versus actual movements, evaluating their congruence. Cathodal tDCS of the PM impairs the activity of such a “comparator,” disrupting self-confidence about own motor performance.

Sign in / Sign up

Export Citation Format

Share Document