The new method of initial calibration with the wheel force transducer

Sensor Review ◽  
2014 ◽  
Vol 34 (1) ◽  
pp. 98-109 ◽  
Author(s):  
Dong Wang ◽  
Guoyu Lin ◽  
Wei-gong Zhang ◽  
Ning Zhao ◽  
Han Pang
Keyword(s):  
Force Transducer ◽  
New Method ◽  
Test Results ◽  
Content Type ◽  
Initial Values ◽  
Data Process ◽  
Force Transducers ◽  
Value Determination ◽  
Vehicle Test ◽  
Real Vehicle

Purpose – One of the major shortcomings in the data process of the traditional wheel force transducers (WFTs) is the theoretical errors of initial value determination. A new method to identify the initial values of the WFT for the solution of this problem is proposed in this paper. The paper aims to discuss these issues. Design/methodology/approach – With this method, the initial values can be obtained by equations which are established based on multiple stops on horizontal road. Findings – The calibration and contrast tests on the MTS calibration platform illustrate the better performance with the new method. Moreover, the real vehicle test confirms the effectiveness in practice. Originality/value – The test results show that the new method of initial calibration has an advanced performance compared to the traditional one. In addition, it is effective in the brake test with a real vehicle.

Study on Computer Simulation for Car Handling Dynamics with 8 DOF

2013 ◽  
Vol 655-657 ◽  
pp. 1136-1140
Author(s):  
Peng Zhang ◽  
Le He ◽  
Xu Tao Liu ◽  
Qun Sheng Xia
Keyword(s):  
Mathematical Model ◽  
Load Transfer ◽  
Normal Load ◽  
Lateral Acceleration ◽  
Test Results ◽  
Double Lane Change ◽  
Vehicle Test ◽  
The Mathematical Model ◽  
Real Vehicle ◽  
Good Agreement

A mathematical model of eight degrees freedom was built up with considering the normal load transfer due to the presence of the longitudinal, lateral acceleration for a vehicle under braking in turn condition. And the simulation model based on the mathematical model was eatablished by means of MATLAB/Simulink software. The comparison between simulation results and real vehicle test results under the snow pavement double-lane change condition is in good agreement. It can be concluded that the 8DOF vehicle dynamics model of this study is acceptable and valid.

Customer lifetime value determination based on RFM model

2016 ◽  
Vol 34 (4) ◽  
pp. 446-461 ◽  
Author(s):  
Fariba Safari ◽  
Narges Safari ◽  
Gholam Ali Montazer
Keyword(s):  
Clustering Algorithm ◽  
Fuzzy Ahp ◽  
Customer Lifetime Value ◽  
Customer Segmentation ◽  
New Method ◽  
Content Type ◽  
Customer Lifetime ◽  
Lifetime Value ◽  
Fuzzy C Means Clustering ◽  
Value Determination

Purpose – One of the salient challenges in customer-oriented organizations is to recognize, segment and rank customers. Customer segmentation is usually based on customer lifetime value (CLV) measured by three purchase variables: “Recency,” “Frequency” and “Monetary.” However, due to the ambiguity of these variables, using deterministic approach is not appropriate. For tackling this matter, the purpose of this paper is to propose a new method of customer segmentation and ranking by combining fuzzy clustering (as a segmentation method) and fuzzy AHP (as a ranking method). Design/methodology/approach – First, customers are classified based on purchase variables using fuzzy c-means clustering algorithm. Second, the variables are weighed applying an optimized version of AHP method. Considering the derived weights and customer groups, this paper follows to ranks segments based on CLV. The developed methodology has been implemented for a large IT company in Iran. Findings – The results show a tremendous capability to the company to evaluate his customers by dividing them into nine ranked segments. The validity of clusters has been submitted. Research limitations/implications – For researchers, this study provides a useful literature by combining FCM and an optimized version of fuzzy AHP in order to cover the limitations of previous methodologies. For organizations, this study clarifies the procedure of customer segmentation by which they can improve their marketing activities. Practical implications – Managers can consider the proposed CLV calculation methodology for selling the next best services/products to the group of customers that are more valuable, by calculating the entire lifetime value of the customers. Originality/value – This study contributes to the process of customer segmentation based on CLV, proposing a new method which covers the limitations of previous customer segmentation methods.

Real Vehicle Test Research of Anti-Lock Based on Fuzzy Control Algorithm

2014 ◽  
Vol 968 ◽  
pp. 222-225
Author(s):  
Li Qiang Jin ◽  
Gang He ◽  
Yue Liu
Keyword(s):  
Fuzzy Control ◽  
Control Method ◽  
Cold Season ◽  
Road Surface ◽  
Test Results ◽  
Control Rules ◽  
Surface Test ◽  
Vehicle Test ◽  
Fuzzy Control Algorithm ◽  
Real Vehicle

To control the dynamic system, fuzzy control adopts the human brain intelligent reasoning methods, adheres to strict control rules. Compared with other ABS control method, it has good robustness, the characteristics of simple and practical, applicable to a variable and nonlinear ABS control system. In this paper, the fuzzy algorithm was used in ABS system of real car and tested at cold season, completed the ice road surface and the concrete road surface test. We have analyzed the test results in detail.

Lubricant compatibility of FKM seals in synthetic oils

2019 ◽  
Vol 72 (5) ◽  
pp. 557-565
Author(s):  
Dilek Bulut ◽  
Tatjana Krups ◽  
Gerhard Poll ◽  
Ulrich Giese
Keyword(s):  
Polyethylene Glycol ◽  
Design Methodology ◽  
Elevated Temperatures ◽  
Failure Mechanisms ◽  
Standard Test ◽  
New Method ◽  
Static Tests ◽  
Content Type ◽  
Lip Seals ◽  
First Results

Purpose Elastomer seals are used in many applications. They are exposed to lubricants and additives at elevated temperatures, as well as mechanical stresses. They can only provide good sealing function when they have resistance to those factors. There are many elastomer-lubricant compatibility tests based on DIN ISO 1817 in industry. However, they are insufficient and costly. Correlations between the tests and the applications are inadequate. The purpose of this study is investigating lubricant compatibility of fluoroelastomers (FKM) seals in polyethylene-glycol (PG)- and polyalphaolefin (PAO)- based synthetic oils and developing a methodology to predict seal service life. Design/methodology/approach A new compatibility test which is more sufficient in terms of time and cost was developed and compared with a standard test, currently used in industry. Compatibility of FKM radial lip seals with PG- and PAO-based synthetic oils with different additives was investigated chemically and dynamically. Failure mechanisms were examined. Findings The new method and the Freudenberg Flender Test FB 73 11 008 showed similar results concerning damages and similar tendencies regarding wear. The additive imidazole derivative was the most critical. Static tests give indications of possible chemically active additives, but alone they are insufficient to simulate the dynamic applications. Originality/value The paper describes a new method to investigate elastomer-lubricant compatibility and gives first results with a variety of lubricants.

New product and emerging business growth in Kwara State

2016 ◽  
Vol 12 (3) ◽  
pp. 207-227 ◽  
Author(s):  
Seun Oladele ◽  
Femi Oladele
Keyword(s):  
Market Share ◽  
Manufacturing Industry ◽  
Service Industry ◽  
New Product ◽  
Sales Volume ◽  
Test Results ◽  
Business Growth ◽  
Content Type ◽  
Product Service ◽  
Service Portfolio

Purpose – The purpose of this paper is to examine the effect of new product on growth of emerging businesses (EBs) through sales volume and market share. Design/methodology/approach – The study surveyed 137 EBs in Kwara State. Two hypotheses were formulated and tested using correlation and regression analyses. Findings – Results show that service industry is dominant among EBs while the manufacturing industry trails. Many EBs are aware of the complexities of new product, its development and contribution to increasing sales volume, market share and ensuring competitive advantage with apparent infrastructural deficiencies. Test results show that there is a significant positive relationship and effect on sales volume and market share. Originality/value – Encouraging EBs to step up and focus on improving product/service portfolio to transform their fortune is explored giving focus to the benefits of increasing sales volume and market share.

scholarly journals The drivers of economic growth in China and India: globalization or financial development?

2017 ◽  
Vol 16 (1) ◽  
pp. 54-84 ◽  
Author(s):  
Magda Kandil ◽  
Muhammad Shahbaz ◽  
Mantu Kumar Mahalik ◽  
Duc Khuong Nguyen
Keyword(s):  
Economic Growth ◽  
Financial Development ◽  
Emerging Market ◽  
Annual Data ◽  
Test Results ◽  
Causality Test ◽  
Content Type ◽  
China And India ◽  
Integration Test ◽  
The Impact

Purpose Using annual data from 1970 to 2013 for China and India, this paper aims to examine the impact of globalization and financial development on economic growth by endogenizing capital and inflation and drawing comparisons between the two fastest growing emerging market economies. Design/methodology/approach In the long run, co-integration test results indicate that financial development increases economic growth in China and India. Findings The results also reveal that globalization accelerates economic growth in India but, surprisingly, impairs economic growth in China, as it increases competition for exports. The results furthermore disclose that acceleration in capitalization and inflation, as a proxy for aggregate demand, are positively linked to economic growth in China and India. Originality/value Causality test results indicate that both financial development and economic growth are interdependent. In contrast, causality runs from higher economic growth to increased globalization in India, while the results do not support long-term causality between globalization and economic growth in China.

Study of mechanical properties of indium-based solder alloys for cryogenic applications

2022 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Madhuri Chandrashekhar Deshpande ◽  
Rajesh Chaudhari ◽  
Ramesh Narayanan ◽  
Harishwar Kale
Keyword(s):  
Mechanical Properties ◽  
Solder Alloy ◽  
Charpy Impact ◽  
Charpy Impact Test ◽  
Test Results ◽  
Solder Alloys ◽  
Content Type ◽  
Electron Microscope Analysis ◽  
American Society ◽  
Work Done

Purpose This study aims to develop indium-based solders for cryogenic applications. Design/methodology/approach This paper aims to investigate mechanical properties of indium-based solder formulations at room temperature (RT, 27 °C) as well as at cryogenic temperature (CT, −196 °C) and subsequently to find out their suitability for cryogenic applications. After developing these alloys, mechanical properties such as tensile and impact strength were measured as per American Society for Testing and Materials standards at RT and at CT. Charpy impact test results were used to find out ductile to brittle transition temperature (DBTT). These properties were also evaluated after thermal cycling (TC) to find out effect of thermal stress. Scanning electron microscope analysis was performed to understand fracture mechanism. Results indicate that amongst the solder alloys that have been studied in this work, In-34Bi solder alloy has the best all-round mechanical properties at RT, CT and after TC. Findings It can be concluded from the results of this work that In-34Bi solder alloy has best all-round mechanical properties at RT, CT and after TC and therefore is the most appropriate solder alloy amongst the alloys that have been studied in this work for cryogenic applications Originality/value DBTT of indium-based solder alloys has not been found out in the work done so far in this category. DBTT is necessary to decide safe working temperature range of the alloy. Also the effect of TC, which is one of the major reasons of failure, was not studied so far. These parameters are studied in this work.

Performance assessment of the complex repairable system with n-identical units under (k-out-of-n: G) scheme and copula linguistic repair approach

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
V. V. Singh ◽  
Abubakkar Idris Mohhammad ◽  
Kabiru Hamisu Ibrahim ◽  
Ibrahim Yusuf
Keyword(s):  
Complex System ◽  
Design Methodology ◽  
New Method ◽  
Social Implications ◽  
Repairable System ◽  
Variable Technique ◽  
Content Type ◽  
Different Types ◽  
Theoretical Assessment ◽  
Practical Implications

PurposeThis paper analyzed a complex system consisting n-identical units under a k-out-of-n: G; configuration via a new method which has not been studied by previous researchers. The computed results are more supportable for repairable system performability analysis.Design/methodology/approachIn this paper, the authors have analyzed a complex system consisting n-identical units under a k-out-of-n: G; configuration via a new method which has not been studied by previous researchers. The supplementary variable technique has employed for analyzing the performance of the system.FindingsReliability measures have been computed for different types of configuration. It generalized the results for purely series and purely parallel configurations.Research limitations/implicationsThis research may be beneficial for industrial system performances whereas a k-out-of-n-type configuration exists.Practical implicationsNot sure as it is a theoretical assessment.Social implicationsThis research may not have social implications.Originality/valueThis work is the sole work of authors that have not been communicated to any other journal before.

Local government website usability on mobile devices: test results and recommendations

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Karol Król ◽  
Dariusz Zdonek
Keyword(s):  
Local Government ◽  
Mobile Devices ◽  
Local Governments ◽  
Recent Decade ◽  
Test Results ◽  
Content Type ◽  
Computer Tools ◽  
Website Usability ◽  
Social Importance ◽  
Government Website

Purpose The range of official business that can be handled online has grown in the recent decade. In many cases, e-services are a must. At the same time, the economic impact and social importance of mobile technology have increased. Mobile devices are becoming more and more popular, and their applications diversify. It comes as no surprise that mobile users expect e-services and official information to be available through this channel. The purpose of this paper is to identify problems (difficulties) occurring when browsing websites of local government units (LGU) on mobile devices. Design/methodology/approach The comfort of website browsing depends mostly on the development technique, and the way content is published. Responsive websites are much easier to view on mobile devices than “static” ones. The study involves 400 websites of LGU in Poland. The websites were subjected to quantitative and qualitative analyses with selected techniques and computer tools. Findings The set of 400 websites contained 119 (29.75%) that were not responsive. It exhibited a substantial potential for the optimisation of websites for mobile devices. The study revealed the most common usability failures such as distorted images, “scattered icons”, partial responsiveness and bothersome messages in pop-ups. Originality/value The research identified the most widespread problems with the tested websites. The study yielded recommendations for local governments, which may be useful when managing content, upgrading the website or replacing it with a new one.

Unmanned vehicle dynamic obstacle detection, tracking and recognition method based on laser sensor

2021 ◽  
Vol 14 (2) ◽  
pp. 239-251
Author(s):  
Hualei Zhang ◽  
Mohammad Asif Ikbal
Keyword(s):  
Feature Fusion ◽  
Obstacle Detection ◽  
Geometric Features ◽  
Recognition Method ◽  
Content Type ◽  
Detection And Tracking ◽  
Spatio Temporal ◽  
Dynamic Obstacle ◽  
Real Vehicle ◽  
Temporal Feature

PurposeIn response to these shortcomings, this paper proposes a dynamic obstacle detection and tracking method based on multi-feature fusion and a dynamic obstacle recognition method based on spatio-temporal feature vectors.Design/methodology/approachThe existing dynamic obstacle detection and tracking methods based on geometric features have a high false detection rate. The recognition methods based on the geometric features and motion status of dynamic obstacles are greatly affected by distance and scanning angle, and cannot meet the requirements of real traffic scene applications.FindingsFirst, based on the geometric features of dynamic obstacles, the obstacles are considered The echo pulse width feature is used to improve the accuracy of obstacle detection and tracking; second, the space-time feature vector is constructed based on the time dimension and space dimension information of the obstacle, and then the support vector machine method is used to realize the recognition of dynamic obstacles to improve the obstacle The accuracy of object recognition. Finally, the accuracy and effectiveness of the proposed method are verified by real vehicle tests.Originality/valueThe paper proposes a dynamic obstacle detection and tracking method based on multi-feature fusion and a dynamic obstacle recognition method based on spatio-temporal feature vectors. The accuracy and effectiveness of the proposed method are verified by real vehicle tests.

Sign in / Sign up

Export Citation Format

Share Document