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HomeAuthorsGallacher B.J.

Authors: Gallacher B.J.

A novel high-sensitivity resonant viscometer realised through the exploitation of nonlinear dynamic behaviour

Waugh W.H., Gallacher B.J., Burdess J.S., Newcastle University, UK
By suitably harmonically oscillating a clamped-clamped beam immersed in fluid, it is possible to induce nonlinear dynamic behaviour. Singular jump points occur in the frequency response function, the separation of which is dependent on the [...]

Experimental results for a parametrically excited micro-ring resonator

Harish K.M., Gallacher B.J., Burdess J.S., Neasham J.A., University of Newcastle upon Tyne, UK
This paper reports experimental results for a parametrically excited micro-ring resonator. Actuation and sensing are performed electrostatically thus making the scheme suitable for many vibratory sensors. The equation of motion for the electrostatically actuated MEMS [...]

Active Damping Control in MEMS Using Parametric Pumping

Gallacher B.J., Burdess J.S., Harris A.J., Harish K.M., Newcastle University, UK
This paper reports on an excitation scheme that enables control of the damping of an electrostatically actuated MEMS sensor through combined external forcing and parametric excitation. System damping is of fundamental importance in vibratory MEMS [...]

Electrostatic Tuning of a Micro-Ring Gyroscope

Gallacher B.J., Hedley J., Burdess J.S., Harris A.J., Rickard A., King D., Insat University of Newcastle, UK
This paper describes a procedure for identifying and correcting anisoinertia and anisoelasticity present in a micro-ring gyroscope. The major disadvantages of popular tuning methods such as mass trimming using laser ablation or focussed ion beam [...]

Device Characterization at the Wafer Level via Optical Actuation and Detection

Hedley J., Burdess J.S., Harris A.J., Gallacher B.J., Newcastle University, UK
This paper investigates the technique of optical actuation of MEMS. It is shown that a device can be driven into all of its vibrational modes simply and non-destructively by a laser pulse, making this an [...]

The Application of Parametric Excitation to a Micro-Ring Gyroscope

Gallacher B.J., Burdess J.S., Harris A.J., Hedley J., Insat University of Newcastle, UK
This paper reports on a parametric excitation scheme that separates the drive and response frequencies of a micro-ring gyroscope in the ratio 10:1 approximately, with the aim of minimising electrical "feedthrough". Electrical feedthrough of the [...]

Frequency Tuning of Silicon Micromechanical Cantilevers by Laser Ablation

Gallacher B.J., Hedley J., Burdess J.S., Harris A.J., Newcastle University, UK
The high Q-factor and stability of micromechanical resonators makes them attractive for a range of applications such as R.F. filters [1] and resonant sensors [2]. In many cases, a specific resonant frequency is necessary for [...]

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