Multi-mode vibration reduction of a CD-ROM drive base using a piezoelectric shunt circuit

2007 ◽  
Vol 300 (1-2) ◽  
pp. 160-175 ◽  
Author(s):  
Seung-Bok Choi ◽  
Heung Soo Kim ◽  
Jong-Sung Park
Keyword(s):  
Vibration Reduction ◽  
Cd Rom ◽  
Mode Vibration ◽  
Multi Mode ◽  
Piezoelectric Shunt ◽  
Shunt Circuit

Vibration reduction of a CD-ROM drive base using a piezoelectric shunt circuit

2004 ◽  
Vol 269 (3-5) ◽  
pp. 1111-1118 ◽  
Author(s):  
J.S. Park ◽  
S.C. Lim ◽  
S.B. Choi ◽  
J.H. Kim ◽  
Y.P. Park
Keyword(s):  
Vibration Reduction ◽  
Cd Rom ◽  
Piezoelectric Shunt ◽  
Shunt Circuit

Energy Harvesting From Building Seismic Isolation With Multi-Mode Resonant Shunt Circuits

2014 ◽  
Author(s):  
Mincan Cao ◽  
Lei Zuo
Keyword(s):  
Energy Harvesting ◽  
Vibration Control ◽  
Seismic Isolation ◽  
Large Scale ◽  
Base Isolation ◽  
Numerical Study ◽  
Vibration Reduction ◽  
Host Structure ◽  
Multi Mode ◽  
Shunt Circuit

A novel electromagnetic transducer shunt circuit is proposed in this paper for dual-functional energy harvesting and vibration control of building seismic isolation. In recent decades, base isolation systems are widely used in low and middle rise buildings. Even though base isolation can filter out high frequency excitation from earthquake, it still necessary to consider higher order modes’ vibration in host structure. The new design extends the multi-mode shunt circuit technology in piezoelectric area in order to achieve good vibration suppression into the seismic isolation of multi degree of freedoms (MDOF) of host structure of buildings, and use multi-mode circuit to achieve both energy harvesting and seismic vibration control. A numerical study of simplified two degree of freedom base isolation is presented in this paper. This passive system is also examined by giving recorded earthquake excitation. The stimulation results show that this new design could take advantage both of low-pass filtering capacity of base isolation system and resonant vibration reduction of electromagnetic shunt circuit. It is also observed that parameters selected for vibration reduction of building can effectively achieve large-scale energy harvesting at same time.

Multiple tuned mass damper for multi-mode vibration reduction of offshore wind turbine under seismic excitation

2018 ◽  
Vol 160 ◽  
pp. 449-460 ◽  
Author(s):  
Mosaruf Hussan ◽  
Mohammad Sabbir Rahman ◽  
Faria Sharmin ◽  
Dookie Kim ◽  
Jeongyun Do
Keyword(s):  
Wind Turbine ◽  
Vibration Reduction ◽  
Tuned Mass Damper ◽  
Offshore Wind ◽  
Seismic Excitation ◽  
Offshore Wind Turbine ◽  
Mass Damper ◽  
Mode Vibration ◽  
Multi Mode

scholarly journals OPTIMAL PIEZOELECTRIC SHUNT DAMPER USING ENHANCED SYNTHETIC INDUCTOR: SIMULATION AND EXPERIMENTAL VALIDATION

2022 ◽  
Vol 23 (1) ◽  
pp. 424-433
Author(s):  
Muhammad Nazri Suhaimi ◽  
Azni Nabela Wahid ◽  
Nor Hidayati Diyana Nordin ◽  
Khairul Affendy Md Nor
Keyword(s):  
Cantilever Beam ◽  
Mechanical Energy ◽  
Vibration Reduction ◽  
Electrical Energy ◽  
Maximum Energy ◽  
Electrical Circuit ◽  
Structural Vibration ◽  
In Series ◽  
Piezoelectric Shunt ◽  
Shunt Circuit

Piezoelectric material has the ability to convert mechanical energy to electrical energy and vice versa, making it suitable for use as an actuator and sensor. When used as a controller in sensor mode, the piezoelectric transducer is connected to an external electrical circuit where the converted electrical energy will be dissipated through Joule heat; also known as piezoelectric shunt damper (PSD). In this work, a PSD is used to dampen the first resonance of a cantilever beam by connecting its terminal to an RL shunt circuit configured in series. The optimal resistance and inductance values for maximum energy dissipation are determined by matching the parameters to the first resonant frequency of the cantilever beam, where R = 78.28 k? and L = 2.9 kH are found to be the optimal values. To realize the large inductance value, a synthetic inductor is utilized and here, the design is enhanced by introducing a polarized capacitor to avoid impedance mismatch. The mathematical modelling of a cantilever beam attached with a PSD is derived and simulated where 70% vibration reduction is seen in COMSOL. From experimental study, the vibration reduction obtained when using the piezoelectric shunt circuit with enhanced synthetic inductor is found to be 67.4% at 15.2 Hz. Results from this study can be used to improve PSD design for structural vibration control at targeted resonance with obvious peaks. ABSTRAK: Material piezoelektrik mempunyai keupayaan mengubah tenaga mekanikal kepada tenaga elektrik dan sebaliknya, di mana ia sesuai digunakan sebagai penggerak dan pengesan. Apabila digunakan sebagai alat kawalan dalam mod pengesan, piezoelektrik disambung kepada litar elektrik luaran di mana tenaga elektrik yang ditukarkan akan dibebaskan sebagai haba Joule; turut dikenali sebagai peredam alihan piezoelektrik (PSD). Kajian ini menggunakan PSD sebagai peredam resonan pertama pada palang kantilever dengan menyambungkan terminal kepada litar peredam RL bersiri. Rintangan optimal dan nilai aruhan bagi tenaga maksimum yang dibebaskan terhasil dengan membuat padanan parameter pada frekuensi resonan pertama palang kantilever, di mana R = 78.28 k? dan L = 2.9 kH adalah nilai optimum. Bagi merealisasikan nilai aruhan besar, peraruh buatan telah digunakan dan di sini, rekaan ini ditambah baik dengan memperkenalkan peraruh polaris bagi mengelak ketidakpadanan impedans. Model matematik palang kantilever yang bersambung pada PSD telah diterbit dan disimulasi, di mana 70% getaran berkurang pada COMSOL. Hasil dapatan eksperimen ini menunjukkan pengurangan getaran yang terhasil menggunakan litar peredam piezoelektrik bersama peraruh buatan menghasilkan 67.4% pada 15.2 Hz. Hasil dapatan kajian ini dapat digunakan bagi membaiki rekaan PSD berstruktur kawalan getaran iaitu pada resonan tumpuan di puncak ketara.

scholarly journals Enhanced Piezoelectric Shunt Design

2003 ◽  
Vol 10 (2) ◽  
pp. 127-133 ◽  
Author(s):  
Chul H. Park ◽  
Daniel J. Inman
Keyword(s):  
Vibration Mode ◽  
Vibration Suppression ◽  
Vibration Reduction ◽  
Low Frequency ◽  
Internal Resistance ◽  
Vibration Modes ◽  
Low Frequency Vibration ◽  
Design Resistance ◽  
Piezoelectric Shunt ◽  
Shunt Circuit

Piezoceramic material connected to an electronic shunt branch circuit has formed a successful vibration reduction device. One drawback of the conventional electronic shunt circuit is the large inductance required when suppressing low frequency vibration modes. Also, the large internal resistance associated with this large inductance exceeds the optimal design resistance needed for low frequency vibration suppression. To solve this problem, a modified and enhanced piezoelectric shunt circuit is designed and analyzed by using mechanical-electrical analogies to present the physical interpretation. The enhanced shunt circuit developed in this paper is proved to significantly reduce the targeted vibration mode of a cantilever beam, theoretically and experimentally.

Reduction of Structural Sound Radiation and Vibration Using Shunt Piezoelectric Materials

2009 ◽  
Vol 147-149 ◽  
pp. 882-889 ◽  
Author(s):  
Stanislaw Pietrzko ◽  
Qibo Mao
Keyword(s):  
Mechanical Energy ◽  
Control Performance ◽  
Optimal Parameters ◽  
Switching Circuit ◽  
Pulse Switching ◽  
Piezoelectric Patch ◽  
Parallel Circuit ◽  
Piezoelectric Shunt ◽  
Base Structure ◽  
Shunt Circuit

In this paper, structural sound and vibration control using passive and semi-active shunt piezoelectric damping circuits is presented. A piezoelectric patch with an electrical shunt circuit is bonded to a base structure. When the structure vibrates, the piezoelectric patch strains and transforms the mechanical energy of the structure into electrical energy, which can be effectively dissipated by the shunt circuit. Hence, the shunt circuit acts as a means of extracting mechanical energy from the base structure. First, different types of shunt circuits (such as RL series circuit, RL parallel circuit and RL-C circuit), employed in the passive damping arrangement, are analyzed and compared. By using the impedance method, the general modelling of different shunt piezoelectric damping techniques is presented. The piezoelectric shunt circuit can be seen as additional frequency-dependence damping of the system. One of the primary concerns in shunt damping is to choose the optimal parameters for shunt circuits. In past efforts most of the proposed tuning methods were based on modal properties of the structure. These methods are used to minimize the response of a particular structural mode whilst neglecting the contribution of the other modes. In this study, a design method based on minimization of the sound power of the structure is proposed. The optimal parameters for shunt circuits are obtained using linear quadratic optimal control theory. In general, the passive shunt circuit techniques are an effective method of modal damping. However, the main drawback of the passive shunt circuit is that the shunt piezoelectric is very sensitive to tuning errors and variations in the excitation frequency. To overcome this problem, the pulse-switching shunt circuit, a semi-active continuous switching technique in which a RL shunt circuit is periodically connected to a bonded piezoelectric patch, is introduced as structural damping. The switch law for pulse-switching circuit is discussed based on the energy dissipation technique. Compared with a standard passive piezoelectric shunt circuit, the advantages of the pulse-switching shunt circuit is a small required shunt inductance, a lower sensitivity to environmental changes and easier tuning. Very low external power for the switch controller is required so it may be possible to extract this energy directly from the vibration of the structure itself. Numerical simulations are performed for each of these shunts techniques focusing on minimizing radiated sound power from a clamped plate. It is found that the RL series, RL parallel and pulse-switching circuits have basically the same control performance. The RL–C parallel circuit allows us to reduce the value of the inductance L due to the insertion of an external capacity C. However, the control performance will be reduced simultaneously. The pulse-switching circuit is more stable than RL series circuit with regard to structural stiffness variations. Finally, experimental results are presented using an RL series/parallel shunt circuit, RL-C parallel shunt circuit and pulse-switching circuit. The experimental results have shown that the vibration and noise radiation of a structure can be reduced significantly by using these shunt circuits. The theoretical and experimental techniques presented in this study provide a valuable tool for effective shunt piezoelectric damping.

Sign in / Sign up

Export Citation Format

Share Document