Publications

@article{J24b,

title = {Thermal Protection of Piezoelectric Actuators Using Complex Electrical Power Measurements and Simplified Thermal Models},

author = {Y. K. Yong and A. A. Eielsen and A. J. Fleming},

url = {https://www.precisionmechatronicslab.com/wp-content/uploads/2024/02/J24b-preprint.pdf},

doi = {10.1109/TMECH.2023.3277437},

isbn = {1083-4435},

year  = {2024},

date = {2024-01-01},

urldate = {2024-01-01},

journal = {IEEE/ASME Transactions on Mechatronics},

abstract = {This article describes a method for estimating the temperature of high-power piezoelectric actuators when a direct temperature measurement is impractical. The heat flow is estimated from the real component of the electrical power; then, the temperature is estimated by a transfer function that approximates the thermal response of the system. The transfer function can be derived analytically from a lumped-element approximation or calibrated experimentally by using a system identification method. The proposed method is demonstrated on a piezoelectric stack actuator used in a high-speed nanopositioning device. A second-order transfer function estimates the temperature to within 3  ∘ C of a reference measurement for a range of operating conditions. The proposed method is suitable for protecting piezoelectric actuators in applications where direct temperature measurement is impractical, for example, due to space or wiring constraints.},

keywords = {piezoelectric, System Identification, Thermal},

pubstate = {forthcoming},

tppubtype = {article}

}

@article{Ruppert2020,

title = {Amplitude Noise Spectrum of a Lock-in Amplifier: Application to Microcantilever Noise Measurements},

author = {M. G. Ruppert and N. J. Bartlett and Y. K. Yong and A. J. Fleming},

url = {https://www.precisionmechatronicslab.com/wp-content/uploads/2020/09/J20f.pdf},

doi = {10.1016/j.sna.2020.112092},

year  = {2020},

date = {2020-05-29},

journal = {Sensors and Actuators A: Physical},

volume = {312},

pages = {112092},

abstract = {The lock-in amplifier is a crucial component in many applications requiring high-resolution displacement sensing; it's purpose is to estimate the amplitude and phase of a periodic signal, potentially corrupted by noise, at a frequency determined by a reference signal. Where the noise can be approximated by a stationary Gaussian process, such as thermal force noise and electronic sensor noise, this article derives the amplitude noise spectral density of the lock-in-amplifier output. The proposed method is demonstrated by predicting the demodulated noise spectrum of a microcantilever for dynamic-mode atomic force microscopy to determine the cantilever on-resonance thermal noise, the cantilever tracking bandwidth and the electronic noise floor. The estimates are shown to closely match experimental results over a wide range of operating conditions.},

keywords = {AFM, Cantilever, Demodulation, MEMS, System Identification},

pubstate = {published},

tppubtype = {article}

}

@article{J03e,

title = {Spatial system identification of a simply supported beam and a trapezoidal cantilever plate},

author = {A. J. Fleming and S. O. R. Moheimani},

url = {https://www.precisionmechatronicslab.com/wp-content/publications/J03e.pdf},

year  = {2003},

date = {2003-01-01},

journal = {IEEE Transactions on Control Systems Technology},

volume = {11},

number = {5},

pages = {726--736},

keywords = {System Identification},

pubstate = {published},

tppubtype = {article}

}

@article{J02b,

title = {Subspace-based system identification for an acoustic enclosure},

author = {T. McKelvey and A. J. Fleming and S. O. R. Moheimani},

url = {https://www.precisionmechatronicslab.com/wp-content/publications/J02b.pdf},

year  = {2002},

date = {2002-01-01},

journal = {Transactions of the ASME, Journal of Vibration & Acoustics},

volume = {124},

number = {3},

pages = {414--419},

keywords = {System Identification},

pubstate = {published},

tppubtype = {article}

}