Dynamic Characterization of a Piezoelectric Actuated Cantilever Beam Using Energetic Parameters

Horodincă, Mihăiţă; Seghedin, Neculai-Eugen; Carata, E.; Boca, Mihai; Filipoaia, Claudiu; Chitariu, Dragoș Florin

doi:10.1080/15376494.2012.680668

Cited by 7 publications

(6 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Also, in order to eliminate the contact with processed surfaces, it will be used an inductive transducer (7), type MKO WB 202 73319, manufactured by RFT. For acquisition of data obtained from transducer it will be used an acquisition measurement bridge (AMB) based on a numerical oscilloscope ADC 212-50, Pico technology U.K. For processing data it was used a Device Acquisition Data's (DAD), type N2302, produced by IEMI company.…”

Section: Description Of the Experimental Standmentioning

confidence: 99%

“…This value is expressed in micrometres, as result of difference between the aria of initial workpiece and the considered value for depth of cut. Trough elimination of the remaining diameter, it is possible to reveal the size of radial deflection [6,7].` Considering that trough multiple cutting passes over the surface of the workpiece, the radial deflection should disappear and into the following it will be study this concept.…”

Section: Theoretical Aspectsmentioning

confidence: 99%

See 1 more Smart Citation

Study of the Rotation Accuracy Motion of a Workpiece with Radial Deflection Processed by Turning

Boca

Nagîţ

Horodincă

2015

AMM

Self Cite

View full text Add to dashboard Cite

During cutting processes, due to the multiple causes which they have their error sources into the technological system, appears a series of processing errors. Depending by the source of influence, the radial deflection error will affect the accuracy of work piece processed. This paper proposes an experimental study under the aspects which follow the elimination of the radial deflection of a processed work piece. For that, it will be applied the principle of removing the excess material, by multiple processing passing over the processed surface, in order to eliminate the radial deflection. This research supposes that the radial deflection could be studied by measuring the relative distance between a transducer and the considered work piece, considering the machine tool as experimental stand.

show abstract

Section: Description Of the Experimental Standmentioning

confidence: 99%

Section: Theoretical Aspectsmentioning

confidence: 99%

Study of the Rotation Accuracy Motion of a Workpiece with Radial Deflection Processed by Turning

Boca

Nagîţ

Horodincă

2015

AMM

Self Cite

View full text Add to dashboard Cite

show abstract

“…The few papers on this topic focus mainly on electric motor condition diagnosis based on instantaneous electric power, for stator turn fault detection [ 37 ] and mechanical imbalances of the rotor [ 38 ], or based on power factor [ 39 ] evolution. It seems that, according to the literature, instantaneous electrical power is a better approach than active electric power to the description of free and forced mechanical oscillations, as periodical mechanical loading, in driven machines and systems [ 40 ], to the description of simulated vibrations [ 41 ] and experimentally revealed vibrations [ 42 ] at resonance or to the description of active damping [ 43 ] in electrically actuated mechanical systems.…”

Section: Introductionmentioning

confidence: 99%

On the Behaviour of an AC Induction Motor as Sensor for Condition Monitoring of Driven Rotary Machines

Horodincă

Bumbu

Chitariu

et al. 2023

Sensors

Self Cite

View full text Add to dashboard Cite

This paper presents some advances in condition monitoring for rotary machines (particularly for a lathe headstock gearbox) running idle with a constant speed, based on the behaviour of a driving three-phase AC asynchronous induction motor used as a sensor of the mechanical power via the absorbed electrical power. The majority of the variable phenomena involved in this condition monitoring are periodical (machines having rotary parts) and should be mechanically supplied through a variable electrical power absorbed by a motor with periodical components (having frequencies equal to the rotational frequency of the machine parts). The paper proposes some signal processing and analysis methods for the variable part of the absorbed electrical power (or its constituents: active and instantaneous power, instantaneous current, power factor, etc.) in order to achieve a description of these periodical constituents, each one often described as a sum of sinusoidal components with a fundamental and some harmonics. In testing these methods, the paper confirms the hypothesis that the evolution of the electrical power (instantaneous and active) has a predominantly deterministic character. Two main signal analysis methods were used, with good, comparable results: the fast Fourier transform of short and long signal sequences (for the frequency domain) and the curve fitting estimation (in the time domain). The determination of the amplitude, frequency and phase at origin of time for each of these components helps to describe the condition (normal or abnormal) of the machine parts. Several achievements confirm the viability of this study: a characterization of a flat driving belt condition and a beating power phenomenon generated by two rotary shafts inside the gearbox. For comparison purposes, the same signal analysis methods were applied to describe the evolution of the vibration signal and the instantaneous angular speed signal at the gearbox output spindle. Many similarities in behaviour among certain mechanical parts (including their electrical power, vibration and instantaneous angular speed) were highlighted.

show abstract

“…This is a resultant vibration with periodical variation of amplitude, with nodes (where the amplitude has a minimum value, the addition of the two vibrations produces destructive interference, 180 degrees out of phase between the constituents of the resultant vibration) and anti-nodes (a maximum amplitude, where the addition of the two vibrations produces constructive interference, with zero degrees shift of phase between constituents) [23]. Obviously the beating phenomenon in mechanics is not solely related to the vibrations produced by rotary unbalanced bodies, it also occurs when two vibration modes with almost the same modal frequency are excited [24,25], and it occurs as well when a system vibrates simultaneously due to forced sinusoidal excitation close to a resonant frequency and due to a free response [26][27][28][29].…”

Section: Introductionmentioning

confidence: 99%

An Experimental Approach on Beating in Vibration Due to Rotational Unbalance

et al. 2020

Self Cite

View full text Add to dashboard Cite

This paper proposes a study in theoretical and experimental terms focused on the vibration beating phenomenon produced in particular circumstances: the addition of vibrations generated by two rotating unbalanced shafts placed inside a lathe headstock, with a flat friction belt transmission between the shafts. The study was done on a simple computer-assisted experimental setup for absolute vibration velocity signal acquisition, signal processing and simulation. The input signal is generated by a horizontal geophone as the sensor, placed on a headstock. By numerical integration (using an original antiderivative calculus and signal correction method) a vibration velocity signal was converted into a vibration displacement signal. In this way, an absolute velocity vibration sensor was transformed into an absolute displacement vibration sensor. An important accomplishment in the evolution of the resultant vibration frequency (or combination frequency as well) of the beating vibration displacement signal was revealed by numerical simulation, which was fully confirmed by experiments. In opposition to some previously reported research results, it was discovered that the combination frequency is slightly variable (tens of millihertz variation over the full frequency range) and it has a periodic pattern. This pattern has negative or positive peaks (depending on the relationship of amplitudes and frequencies of vibrations involved in the beating) placed systematically in the nodes of the beating phenomena. Some other achievements on issues involved in the beating phenomenon description were also accomplished. A study on a simulated signal proves the high theoretical accuracy of the method used for combination frequency measurement, with less than 3 microhertz full frequency range error. Furthermore, a study on the experimental determination of the dynamic amplification factor of the combination vibration (5.824) due to the resonant behaviour of the headstock and lathe on its foundation was performed, based on computer-aided analysis (curve fitting) of the free damped response. These achievements ensure a better approach on vibration beating phenomenon and dynamic balancing conditions and requirements.

show abstract

Dynamic Characterization of a Piezoelectric Actuated Cantilever Beam Using Energetic Parameters

Cited by 7 publications

References 11 publications

Study of the Rotation Accuracy Motion of a Workpiece with Radial Deflection Processed by Turning

Study of the Rotation Accuracy Motion of a Workpiece with Radial Deflection Processed by Turning

On the Behaviour of an AC Induction Motor as Sensor for Condition Monitoring of Driven Rotary Machines

An Experimental Approach on Beating in Vibration Due to Rotational Unbalance

Contact Info

Product

Resources

About