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Negating self-induced parametric excitation in capacitive ring-based MEMS Coriolis vibrating gyroscopes (2025)
Journal Article
Arifin, D., & McWilliam, S. (2025). Negating self-induced parametric excitation in capacitive ring-based MEMS Coriolis vibrating gyroscopes. Journal of Sound and Vibration, 607, Article 119016. https://doi.org/10.1016/j.jsv.2025.119016

Rate sensing performance of ring-based capacitive Coriolis Vibratory Gyroscopes (CVGs) is degraded by the presence of imperfections and self-induced parametric excitation caused by electrostatic nonlinearities as the drive amplitude increases. This p... Read More about Negating self-induced parametric excitation in capacitive ring-based MEMS Coriolis vibrating gyroscopes.

Rate-Sensing Performance of Imperfect Capacitive Ring-Based MEMS Coriolis Vibrating Gyroscopes at Large Drive Amplitudes † (2024)
Journal Article
Arifin, D., & McWilliam, S. (2024). Rate-Sensing Performance of Imperfect Capacitive Ring-Based MEMS Coriolis Vibrating Gyroscopes at Large Drive Amplitudes †. Sensors, 25(7), 1-26. https://doi.org/10.3390/s25072263

This paper investigates the effect of electrostatic nonlinearity on the rate-sensing performance of imperfect ring-based Coriolis Vibrating Gyroscopes (CVGs) for devices having 8 and 16 evenly distributed electrodes. Mathematical models are developed... Read More about Rate-Sensing Performance of Imperfect Capacitive Ring-Based MEMS Coriolis Vibrating Gyroscopes at Large Drive Amplitudes †.

Effects of electrostatic nonlinearity on the rate measuring performance of ring based Coriolis Vibrating Gyroscopes (CVGs) (2022)
Journal Article
Arifin, D., & McWilliam, S. (2022). Effects of electrostatic nonlinearity on the rate measuring performance of ring based Coriolis Vibrating Gyroscopes (CVGs). Sensors and Actuators A: Physical, 340, Article 113539. https://doi.org/10.1016/j.sna.2022.113539

Electrostatic nonlinearities are the dominant source of nonlinearity in ring-based capacitive Coriolis Vibrating Gyroscopes (CVGs) and have potential to parametrically amplify the sense response of the ring resonator and enhance measurement sensitivi... Read More about Effects of electrostatic nonlinearity on the rate measuring performance of ring based Coriolis Vibrating Gyroscopes (CVGs).

Nonlinear electrostatic effects in MEMS ring-based rate sensors under shock excitation (2019)
Journal Article
Sieberer, S., Mcwilliam, S., & Popov, A. A. (2019). Nonlinear electrostatic effects in MEMS ring-based rate sensors under shock excitation. International Journal of Mechanical Sciences, 157-158, 485-497. https://doi.org/10.1016/j.ijmecsci.2019.04.028

The vibration response of a capacitive ring-based Coriolis Vibrating Gyroscope (CVG) subjected to in-plane shock is modelled and analysed to quantify the effect of shock on angular velocity measurement. The model developed considers a ring resonator... Read More about Nonlinear electrostatic effects in MEMS ring-based rate sensors under shock excitation.

Effect of nonlinear electrostatic forces on the dynamic behaviour of a capacitive ring-based Coriolis Vibrating Gyroscope under severe shock (2018)
Journal Article
Chouvion, B., McWilliam, S., & Popov, A. A. (2018). Effect of nonlinear electrostatic forces on the dynamic behaviour of a capacitive ring-based Coriolis Vibrating Gyroscope under severe shock. Mechanical Systems and Signal Processing, 106, https://doi.org/10.1016/j.ymssp.2017.12.043

This paper investigates the dynamic behaviour of capacitive ring-based Coriolis Vibrating Gyroscopes (CVGs) under severe shock conditions. A general analytical model is developed for a multi-supported ring resonator by describing the in-plane ring re... Read More about Effect of nonlinear electrostatic forces on the dynamic behaviour of a capacitive ring-based Coriolis Vibrating Gyroscope under severe shock.

Simply-supported multi-layered beams for energy harvesting (2016)
Journal Article
Patel, R., Tanaka, Y., McWilliam, S., Mutsuda, H., & Popov, A. A. (2017). Simply-supported multi-layered beams for energy harvesting. Journal of Intelligent Material Systems and Structures, 28(6), https://doi.org/10.1177/1045389X16657418

This paper develops an analytical model for predicting the performance of simply-supported multi-layered piezoelectric vibrating energy harvesters. The model includes the effects of material and geometric nonlinearities, as well as axial pre-tension/... Read More about Simply-supported multi-layered beams for energy harvesting.

Model refinements and experimental testing of highly flexible piezoelectric energy harvesters (2016)
Journal Article
Patel, R., Tanaka, Y., McWilliam, S., Mutsuda, H., & Popov, A. A. (2016). Model refinements and experimental testing of highly flexible piezoelectric energy harvesters. Journal of Sound and Vibration, 368, https://doi.org/10.1016/j.jsv.2016.01.005

This paper addresses limitations to existing analytical models for piezoelectric energy harvesters. The presented model is targeted at predicting behaviours of highly flexible piezoelectric devices (FPEDs) and includes high orders of substrate and pi... Read More about Model refinements and experimental testing of highly flexible piezoelectric energy harvesters.

An investigation on thermoelastic damping of high-Q ring resonators (2015)
Journal Article
Hossain, S. T., McWilliam, S., & Popov, A. A. (2016). An investigation on thermoelastic damping of high-Q ring resonators. International Journal of Mechanical Sciences, 106, 209-219. https://doi.org/10.1016/j.ijmecsci.2015.12.023

For applications requiring high performance angular rate measurements it is important to be able to design MEMS rate sensors with high quality factors (Q). This paper considers ring resonator based rate sensors and investigates the influence of desig... Read More about An investigation on thermoelastic damping of high-Q ring resonators.

An experimental study of wave power generation using a flexible piezoelectric device (2015)
Journal Article
Tanaka, Y., Oko, T., Mutsuda, H., Patel, R., McWilliam, S., & Popov, A. (2015). An experimental study of wave power generation using a flexible piezoelectric device. Journal of Ocean Technology, 2(1), 28-36

An experimental study of wave power generation using flexible piezoelectric devices (FPEDs) is presented in this paper. Two alternate configurations for harvesting power from waves are proposed. In the first configuration, the FPEDs are installed hor... Read More about An experimental study of wave power generation using a flexible piezoelectric device.

Optimization of piezoelectric cantilever energy harvesters including non-linear effects (2014)
Journal Article
Patel, R., McWilliam, S., & Popov, A. (2014). Optimization of piezoelectric cantilever energy harvesters including non-linear effects. Smart Materials and Structures, 23(8), Article 085002. https://doi.org/10.1088/0964-1726/23/8/085002

This paper proposes a versatile non-linear model for predicting piezoelectric energy harvester performance. The presented model includes (i) material non-linearity, for both substrate and piezoelectric layers, and (ii) geometric non-linearity incorpo... Read More about Optimization of piezoelectric cantilever energy harvesters including non-linear effects.