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Electromechanical device built around APA400M-MD

White paper: vibration energy harvesting in aircraft using piezoelectric actuators download

Cedrat Technologies S.AWed, 17 Dec 2014

The amplified piezoelectric actuator (APA) integrating a mechanical amplifier can be interesting where the efficiency of the standard actuators is poor. In this paper from Cedrat Technologies, the electrical harvesting characteristics of the APA in a proof mass configuration is studied.

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Technical bulletin: determination of rinse water contamination download

Envirotech EuropeWed, 17 Dec 2014

During the water-rinsing stage of any pre-treatment process, contamination will build up in the system. As Envirotech explains in this bulletin, it is essential to monitor and control the rinse water during the following AQUUS processes: alkali degreasing solutions; iron phosphate treatments; and zirconium/titanium treatments.

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Technical article: engine-mounted ‘BD’ clutch or freestanding ‘BDS’ clutch download

JBJ Techniques Tue, 16 Dec 2014

JBJ Techniques provides guidance on selecting the correct engine-mounted ‘BD’ clutch or freestanding ‘BDS’ clutch.

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Technical article: Mike Might Know — inclinometer sine output errors download

Sherborne SensorsMon, 15 Dec 2014

Gravity-referenced inertial inclinometers are in effect low-frequency response accelerometers and derive their angular information from the acceleration due to gravity, the output being proportional to the normal component of the gravity vector. It is perhaps surprising that some users do not appreciate that the inclinometer output is proportional to the sine of the angle and not the absolute angle in degrees.

3D model of an electromagnetic quadrupole

White paper: beam spot size as a function of excitation levels of magnetic quadrupoles download

Integrated Engineering SoftwareFri, 12 Dec 2014

This paper from Integrated Engineering Software presents an overview of the focusing properties of magnetic quadrupoles and shows how beam spot size can be determined using arc segment emitters. It also shows how parametric variation of the excitation current can be used to determine the optimum level for minimum spot size at points along the beam axis.

Testing

Technical article: 10 reasons why solar PV installations should be tested regularly download

Seaward GroupWed, 10 Dec 2014

Jim Wallace of Seaward Solar looks at the reasons why electrical testing and inspection of solar PV installations is a fundamental requirement for system safety and performance. 

Slip prevention in the winter months

Technical article: Heskins discusses slip prevention in the winter months download

HeskinsTue, 9 Dec 2014

Both snow and ice create huge problems for safety. This article from Heskins discusses how to increase slip prevention in snow and ice. 

Dynamic solenoid test bench

White paper: the method of finite elements in the design process of valve solenoids download

CedratTue, 9 Dec 2014

This paper from Cedrat demonstrates the determination of cut-off frequencies of different proportional electromagnetic actuators in FE simulation under the consideration of eddy currents. The dynamic limits of different concepts thus can be compared in simulation already before the sampling process is started. 

White paper: active damping of vibrations applied on ski structures download

Cedrat Technologies S.ATue, 9 Dec 2014

Since many years the field of active controls of vibration is growing up and a lot of new applications using smart actuators are developed. In the following study, these concepts are adapted and applied on a general structure of ski to damp the large modes of vibrations keeping the robustness of the control and the static loads during the ride.

Digital Twin concept model

White paper: digital twin — manufacturing excellence through virtual factory replication downloadweblink

DELMIA AprisoMon, 8 Dec 2014

This white paper from Apriso introduces the concept of a ‘digital twin’ as a virtual representation of what has been produced. Compare a digital twin with its engineering design to better understand what was produced versus what was designed, tightening the loop between design and execution.

moisture.IQ

Technical article: new generation of moisture analysers for process organic liquids download

GE Measurement & ControlFri, 5 Dec 2014

Monitoring water concentration is essential in maximising the efficiency of many process operations. Choosing the most appropriate technology and partner in making this measurement ensures reliability and instils confidence in the measurement. In this article, Narge J Sparages from GE Measurement & Control discusses the role of water, analytical methods and more.

GAIA sunshield deployment test at ESA

White paper: actuators for space applications — state of the art and new technologies download

Cedrat Technologies S.AFri, 5 Dec 2014

Actuators in space are broadly used to operate satellites’ platform and payload devices. Despite their common utilisation, actuators still represent critical subsystems as their failure might often lead to severe effects on the spacecraft operations. Environmental conditions to which actuators are exposed in space are generally not favourable: operating temperature ranges and deep vacuum are certainly the most critical ones.

TEFC motors used to generate test data

White paper: solving the more difficult aspects of electric motor thermal analysis downloadweblink

CedratFri, 5 Dec 2014

With the ever-increasing pressures on electric motor manufacturers to develop smaller and more efficient electric motors, there is a trend to carry out more thermal analysis in parallel with traditional electromagnetic design. It has been found that attention to the thermal design can be rewarded by major improvements in the overall performance. This paper from Cedrat reviews some of these difficult issues.

Shot peening

Technical article: extending the fatigue life of oilfield drilling equipment downloadweblink

Curtiss-Wright Surface TechnologiesFri, 5 Dec 2014

The majority of drill pipe failures occur as a result of metal fatigue. Fatigue fractures propogate as a result of cyclic stresses that are often far lower than the static design stress for the component. The fatigue damage is cumulative and permanent with cracks propogating until the remaining section is unable to withstand the application of a single load. According to Curtiss-Wright, controlled shot peening is a very economical and well-proven method of extending fatigue life in ...

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Technical article: there’s more to lubrication than lubricants download

ERIKS Flow TechnologyWed, 3 Dec 2014

It’s only too easy to slip up on lubrication — and not just if it’s spilt on the floor. Across a wide range of industries, the importance of lubrication best practice is often overlooked, and knowing the right oil for the job is sometimes felt to be the limit of lubrication obligations. However, according to this article from ERIKS Flow Technology, there are many other aspects to ensuring things run smoothly, and to making sure you don’t get left carrying the can — whether it’s got ...

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