Adaptive sliding bandlimited multiple fourier linear combiner for estimation of pathological tremor

Wang, Shengxin; Gao, Yongsheng; Zhao, Jie; Cai, Hansheng

doi:10.1016/j.bspc.2013.10.004

Cited by 33 publications

(21 citation statements)

References 23 publications

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“…In this section, the parameters of WFLC, BMFLC, ASBMFLC [14] and ABPF are tuned to fit the tremulous signals as well as possible in order to fairly compare their performance. In the proposed method, different lengths of data vector lead to different time delays for starting adapting frequency and different estimated frequency errors between the estimated frequency and the actual frequency in the stabilization stage.…”

Section: B Determination the Values Of Algorithms Parametersmentioning

confidence: 99%

“…The swing is employed to simulate tremor movement and the low-speed and high range swing of the cantilever realized by artificial pull through the rope mimics the voluntary movement. The rotation angle of cantilever is measured by the photoelectric encoder, HEDSS ISC3806 and the data reveals that the platform could generate suitable tremor with intentional movements [14].…”

Section: A Experiments and Data Measurementsmentioning

confidence: 99%

“…However, the effective tremor components are within a frequency range rather than a single frequency in the spectrum of recorded signals. Meanwhile, the frequency bandwidths of pathological tremor and physiological tremor are about 2-3Hz and 3-4Hz, respectively [13,14]. Therefore, the parts of the tremor signals around the dominant frequency will be attenuated and lagged in phase by ABPF, even if the estimated instantaneous frequency accurately matches the filter's center frequency.…”

mentioning

confidence: 93%

“…Other widespread adaptive combined methods for estimating tremor frequency/amplitude with zero-phase lag are developed based on the gradient descent algorithm like least mean square (LMS) [13,14,17]. The weighted Fourier linear combiner (WFLC) algorithm models any quasiperiodic signal as a modulating sinusoidal signal, and tracks its frequency, amplitude and phase by incorporating frequency adaptation procedure into FLC [17].…”

mentioning

confidence: 99%

See 3 more Smart Citations

Estimation of tremor parameters and extraction tremor from recorded signals for tremor suppression

Wang

Gao

Xiao

et al. 2016

2016 IEEE International Conference on Robotics and Automation (ICRA)

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Pathological tremor is defined as a roughly sinusoidal movement and usually occurs in the upper limb impacting individuals activities of daily livings. Functional electrical stimulation (FES) is proposed as a potential alternative for cancelling the pathological tremor. However, the feasibility and accuracy of FES depends on the estimation of amplitude and frequency of tremor signals measured by sensors. In this study, a novel algorithm incorporating a sliding fast Fourier transform (SFFT), an interpolation procedure and a limitation module of frequency range is developed to estimate tremor frequency and separate the tremor components from raw data. Based on the artificial signals and the actual tremor signals, the performance of the proposed algorithm is evaluated. The experimental results indicate that the developed algorithm could quickly adapt to the unknown dominant frequency and extract the tremor components with high accuracy. Therefore, this method could be employed in the tremor suppression by FES without affecting the voluntary movement.

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Section: B Determination the Values Of Algorithms Parametersmentioning

confidence: 99%

Section: A Experiments and Data Measurementsmentioning

confidence: 99%

mentioning

confidence: 93%

mentioning

confidence: 99%

See 2 more Smart Citations

Estimation of tremor parameters and extraction tremor from recorded signals for tremor suppression

Wang

Gao

Xiao

et al. 2016

2016 IEEE International Conference on Robotics and Automation (ICRA)

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“…BMFLC is designed to track multiple harmonics of a signal [29][30][31] and showed higher accuracy compared to conventional FLC-based filters [30]. In the literature, BMFLC filtering has also been used for extracting physiological hand tremor of surgeons [36][37][38] and recently has shown good performance in extracting pathological involuntary motions [33]. .…”

Section: Components and The Design Of Actionsmentioning

confidence: 99%

Telerobotics-Assisted Platform for Enhancing Interaction with Physical Environments for People Living with Cerebral Palsy

Atashzar

Jafari

Shahbazi

et al. 2017

J. Med. Robot. Res.

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In this paper, the design and implementation of a new telerobotics-assisted platform is proposed for individuals who have cerebral palsy (CP). The main objective of the proposed assistive system is to modulate capabilities of individuals through the proposed telerobotic medium and to enhance their control over interaction with objects in a real physical environment. The proposed platform is motivated by evidence showing that lack of interaction with real environments can develop further secondary sensorimotor and cognitive issues for people who grow up with CP. The proposed telerobotic system assists individuals by (a) mapping their limited but convenient motion range to a larger workspace needed for task performance in the real environment, (b) transferring only the voluntary components of the hand motion to the task-side robot to perform tasks and (c) kinaesthetically dissipating the energy of their involuntary motions using a viscous force field implemented in high frequency domain. Consequently, using the proposed system, an individual who has CP will be capable of providing smooth and large-scale motions and presenting enhanced coordination while performing tasks, even if they naturally have involuntary movements, limited range of motion and/or coordination deficits. The proposed architecture is implemented and initially tested for one nondisabled participant. Afterwards, the system is evaluated for one individual who lives with CP. The resulting quality of motion and task performance are analyzed through a designed clinical protocol. The results confirm the functionality of the proposed assistive platform in enhancing the capabilities of individuals who live with CP in interacting with physical environments.

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Mechatronic Devices for Upper Limb Tremor

Zhou,

Daemi,

Edmonds

et al. 2023

Contemporary Clinical Neuroscience

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Adaptive sliding bandlimited multiple fourier linear combiner for estimation of pathological tremor

Cited by 33 publications

References 23 publications

Estimation of tremor parameters and extraction tremor from recorded signals for tremor suppression

Estimation of tremor parameters and extraction tremor from recorded signals for tremor suppression

Telerobotics-Assisted Platform for Enhancing Interaction with Physical Environments for People Living with Cerebral Palsy

Mechatronic Devices for Upper Limb Tremor

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