scholarly journals Measurements of GDL Properties for Quality Control in Fuel Cell Mass Production Line

2016 ◽  
Vol 8 (2) ◽  
pp. 422-430 ◽  
Author(s):  
Xiao-Zi Yuan ◽  
Hui Li ◽  
Elton Gu ◽  
Weimin Qian ◽  
Francois Girard ◽  
...  
Keyword(s):  
Quality Control ◽  
Fuel Cell ◽  
Mass Production ◽  
Production Line ◽  
Cell Mass

System framework of adopting additive manufacturing in mass production line

2021 ◽  
pp. 1-24
Author(s):  
Zhuming Bi ◽  
Guoping Wang ◽  
Joel Thompson ◽  
David Ruiz ◽  
John Rosswurm ◽  
...  
Keyword(s):  
Additive Manufacturing ◽  
Mass Production ◽  
Production Line ◽  
System Framework

Uncertain Gain and Time-Delay Control of 300-kW SOFC-GT

2021 ◽  
Author(s):  
Tooran Emami ◽  
David Tucker ◽  
John Watkins
Keyword(s):  
Fuel Cell ◽  
Time Delay ◽  
Pid Controller ◽  
Transfer Functions ◽  
Cell Mass ◽  
Electric Load ◽  
Cold Air ◽  
Internal Gain ◽  
Air Valve ◽  
Turbine Speed

Abstract This paper presents a Proportional Integral Derivative (PID) controller design with the presence of an uncertain internal gain and additional time delay in the forward path of a 300 kW Solid Oxide Fuel Cell-Gas Turbine (SOFC-GT). The outputs of the system are turbine speed and the fuel cell mass flow rate. A fixed set of proportional controller coefficients are determined to graphically develop an area of selection for the integral and derivative coefficients of the PID controller. The inputs to the power plant are the electric load and cold air valve. The decentralized controllers are applied to four sub-systems as a Single Input Single Output (SISO). The PID controller coefficients are selected from a singular matrix solution that stabilizes the system and satisfies the internal gain and time delay uncertainties. Two sub-systems are the transfer functions of the turbine speed over the electric load and the cold air valve. The other two sub-systems are the transfer functions of the fuel cell mass flow rate over the electric load and the cold air bypass valve. Multiple options for selecting PID controller coefficients are beneficial to the SOFC-GT plant due to the wide range of operations and internal uncertainty interactions. The specific internal time delay and gain margins increase the reliability and robustness of the SOFC-GT with multiple uncertain parameters.

scholarly journals Systematic Innovation for Manufacturing Quality Improvement

2018 ◽  
Vol 221 ◽  
pp. 02005
Author(s):  
Swee Shu Luing Nikalus ◽  
Guan Toh Guat ◽  
Mum Wai Yip ◽  
See Chew Tai
Keyword(s):  
Quality Control ◽  
Production Line ◽  
Function Analysis ◽  
Low Cost ◽  
Innovation Process ◽  
Root Cause ◽  
Latex Gloves ◽  
Chain Analysis ◽  
Air Blowing ◽  
The Times

This paper provides a detailed analysis on the systematic innovation process in improving the quality control of latex gloves production. The systematic innovation tool such as TRIZ is applied in this case study. Function analysis, cause and effect chain analysis, physical contradiction, By-separation model and 40 Inventive Principles are applied in order to derive some feasible and low cost solutions to alleviate the problem. Findings revealed that the rejected (leaking) gloves on the production line will be manually monitored by a checker during the air blowing test and will be discarded by the same checker instantly. The main root cause is that the quality control worker is not able to concentrate all the times to detect the torn gloves, mainly is due to the fast speed production line and other distractions. The problem is solved by applying function analysis, physical contradiction, by-separation tool and Inventive Principles to generate low cost but elegant solutions within the defined scope of several constraints and without making the production line more complex. Therefore, it can be concluded that TRIZ is a systematic and innovative problem solving methodology.

Life Tables as Tools of Evaluation and Quality Control for Arthropod Mass Production

2014 ◽  
pp. 241-275 ◽  
Author(s):  
Maribel Portilla ◽  
Juan A. Morales-Ramos ◽  
M. Guadalupe Rojas ◽  
Carlos A. Blanco
Keyword(s):  
Quality Control ◽  
Mass Production ◽  
Life Tables

Standardized testing framework for quality control of fuel cell bipolar plates

2021 ◽  
Vol 482 ◽  
pp. 228972
Author(s):  
Nima Shaigan ◽  
Xiao-Zi Yuan ◽  
François Girard ◽  
Khalid Fatih ◽  
Mark Robertson
Keyword(s):  
Quality Control ◽  
Fuel Cell ◽  
Standardized Testing ◽  
Bipolar Plates ◽  
Testing Framework

scholarly journals Quality identification methodology applied to wall-elements based on modal analysis

2015 ◽  
Vol 11 (4) ◽  
pp. 507-516 ◽  
Author(s):  
Mariusz Zóltowski ◽  
Ronald M. Martinod
Keyword(s):  
Quality Control ◽  
Modal Analysis ◽  
Mass Production ◽  
Design Methodology ◽  
Production Quality ◽  
State Assessment ◽  
Critical Levels ◽  
Content Type ◽  
Current Mass

Purpose – The recommendation of structural standards, e.g. PN-B-03002, shows a need to control the production quality of wall-elements; the quality control demands suitable guidelines to fit the requirements of the current mass-production of the wall-elements, then, the structural standard recognizes the need of improving the methods to identify the real elements quality. The paper aims to discuss these issues. Design/methodology/approach – The proposed inspection methodology corresponds to assessment models that combine the numerical and symptomatic models to evaluate the critical levels of wall-elements, based on non-intrusive tests through the measurement of a set of signals, using the Experimental Modal Analysis (EMA)-based techniques. Findings – The presented work is developed with an approach that applies advanced calculating techniques used for the structural analysis in civil engineering focused on the technical state assessment. Originality/value – The paper proposes a diagnostic methodology that can be added to the current regulations and standards based on EMA techniques.

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