Outputs (15201)

The prevalent theory of construction is a hindrance for innovation
Presentation / Conference
Koskela, L., & Vrijhoef, R. The prevalent theory of construction is a hindrance for innovation. Presented at 8th Annual Conference of the International Group for Lean Construction, Brighton, UK

It is argued that construction innovation is significantly hindered by the prevalent theory of construction, which is implicit and deficient. There are three main mechanisms through which this hindrance is being caused.
Firstly, because production t... Read More about The prevalent theory of construction is a hindrance for innovation.

Motor current signal analysis using a modified bispectrum for machine fault diagnosis
Presentation / Conference
Gu, F., Shao, Y., Hu, N., Fazenda, B., & Ball, A. Motor current signal analysis using a modified bispectrum for machine fault diagnosis. Presented at ICROS-SICE International Joint Conference 2009, Fukuoka, Japan

This paper presents the use of the induction motor current to identify and quantify common faults within a two-stage reciprocating compressor. The theoretical basis is studied to understand current signal characteristics when the motor undertakes a v... Read More about Motor current signal analysis using a modified bispectrum for machine fault diagnosis.

Motor current signal analysis using a modified bispectrum for machine fault diagnosis
Presentation / Conference
Gu, F., Shao, Y., Hu, N., Fazenda, B., & Ball, A. Motor current signal analysis using a modified bispectrum for machine fault diagnosis. Presented at ICROS-SICE International Joint Conference 2009, Fukuoka, Japan

This paper presents the use of the induction motor current to identify and quantify common faults within a two-stage reciprocating compressor. The theoretical basis is studied to understand current signal characteristics when the motor undertakes a v... Read More about Motor current signal analysis using a modified bispectrum for machine fault diagnosis.

Gearbox fault diagnosis under different operating conditions based on time synchronous average and ensemble empirical mode decomposition
Presentation / Conference
Guan, L., Gu, F., Shao, Y., Fazenda, B., & Ball, A. Gearbox fault diagnosis under different operating conditions based on time synchronous average and ensemble empirical mode decomposition. Presented at ICROS-SICE International Joint Conference 2009, Fukuoka, Japan

In this paper, a new method is proposed by combining ensemble empirical mode decomposition (EEMD) with order tracking techniques to analyse the vibration signals from a two stage helical gearbox. The method improves EEMD results in that... Read More about Gearbox fault diagnosis under different operating conditions based on time synchronous average and ensemble empirical mode decomposition.

Gearbox fault diagnosis under different operating conditions based on time synchronous average and ensemble empirical mode decomposition
Presentation / Conference
Guan, L., Gu, F., Shao, Y., Fazenda, B., & Ball, A. Gearbox fault diagnosis under different operating conditions based on time synchronous average and ensemble empirical mode decomposition. Presented at ICROS-SICE International Joint Conference 2009, Fukuoka, Japan

In this paper, a new method is proposed by combining ensemble empirical mode decomposition (EEMD) with order tracking techniques to analyse the vibration signals from a two stage helical gearbox. The method improves EEMD results in that... Read More about Gearbox fault diagnosis under different operating conditions based on time synchronous average and ensemble empirical mode decomposition.

Acoustic based safety emergency vehicle detection for intelligent transport systems
Presentation / Conference Contribution

A system has been investigated for the detection of incoming direction of an emergency vehicle. Acoustic detection methods based on a cross microphone array have been implemented. It is shown that source detection based on time delay estimation outpe... Read More about Acoustic based safety emergency vehicle detection for intelligent transport systems.

Acoustic based safety emergency vehicle detection for intelligent transport systems
Presentation / Conference Contribution

A system has been investigated for the detection of incoming direction of an emergency vehicle. Acoustic detection methods based on a cross microphone array have been implemented. It is shown that source detection based on time delay estimation outpe... Read More about Acoustic based safety emergency vehicle detection for intelligent transport systems.

Measurement and diagnostic of engine belt physical condition from acoustic signals
Presentation / Conference
Fazenda, B., Gu, F., Avis, M., & Ball, A. Measurement and diagnostic of engine belt physical condition from acoustic signals. Presented at SICE International Joint Conference 2009, Fukuoka, Japan

Measurement and diagnostic of engine belt physical condition from acoustic signals
Presentation / Conference
Fazenda, B., Gu, F., Avis, M., & Ball, A. Measurement and diagnostic of engine belt physical condition from acoustic signals. Presented at SICE International Joint Conference 2009, Fukuoka, Japan

Introducing last planner - Finnish experiences
Presentation / Conference
Koskenvesa, A., & Koskela, L. Introducing last planner - Finnish experiences. Presented at 11th Joint CIB International Symposium - Combining Forces., Helsinki, Finland

The Last Planner method1 represents a radically different manner of controlling production in construction. Even if its benefits are widely observed, it is also a common observation that the introduction of the Last Planner method to a site, into a c... Read More about Introducing last planner - Finnish experiences.