Optimal Vibration Control of a Model Frame Structure Using Piezoceramic                 Sensors and Actuators

Sethi, Vineet; Song, Gangbing

doi:10.1177/1077546305053396

Cited by 54 publications

(43 citation statements)

References 20 publications

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“…Since the crack in this period is much larger than the previous step from 1100 to 2100, the propagating stress wave attenuates more than the previous period. The cycles (6)(7)(8)(9)(10)(11) shown in the damage index are more clear than the previous cycles (1)(2)(3)(4)(5). In addition, the highest values of the damage index reached to one, which implies the concrete column was subject to severe damage in the maximum displacement of each cycle.…”

Section: Wavelet Packet-based Structural Damage Indicesmentioning

confidence: 84%

“…Step 2100, the concrete column was subject to five initial simulated pseudo-dynamic loading cycles (1)(2)(3)(4)(5), as shown in Figure 9. When load increased, the bottom cracks opened and the structural damage increased.…”

Section: Wavelet Packet-based Structural Damage Indicesmentioning

confidence: 99%

“…With attractive features of low-cost, small size, large bandwidth, and actuating-sensing functions, piezoceramics have been increasingly employed in many engineering fields [3][4][5][6][7]. In this project, piezoceramic-based devices, called smart aggregates (SA), were utilized as transducers for structural health monitoring of RC columns under a pseudo-dynamic loading procedure.…”

Section: Introductionmentioning

confidence: 99%

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Cyclic Crack Monitoring of a Reinforced Concrete Column under Simulated Pseudo-Dynamic Loading Using Piezoceramic-Based Smart Aggregates

Robert²,

et al. 2016

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Structural health monitoring is an important aspect of maintenance for bridge columns in areas of high seismic activity. In this project, recently developed piezoceramic-based transducers, known as smart aggregates (SA), were utilized to perform structural health monitoring of a reinforced concrete (RC) bridge column subjected to pseudo-dynamic loading. The SA-based approach has been previously verified for static and dynamic loading but never for pseudo-dynamic loading. Based on the developed SAs, an active-sensing approach was developed to perform real-time health status evaluation of the RC column during the loading procedure. The existence of cracks attenuated the stress wave transmission energy during the loading procedure and reduced the amplitudes of the signal received by SA sensors. To detect the crack evolution and evaluate the damage severity, a wavelet packet-based structural damage index was developed. Experimental results verified the effectiveness of the SAs in structural health monitoring of the RC column under pseudo-dynamic loading. In addition to monitoring the general severity of the damage, the local structural damage indices show potential to report the cyclic crack open-close phenomenon subjected to the pseudo-dynamic loading.

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Section: Wavelet Packet-based Structural Damage Indicesmentioning

confidence: 84%

Section: Wavelet Packet-based Structural Damage Indicesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Cyclic Crack Monitoring of a Reinforced Concrete Column under Simulated Pseudo-Dynamic Loading Using Piezoceramic-Based Smart Aggregates

Robert²,

et al. 2016

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“…Piezoceramics with such attractive features as low cost, small size, wide bandwidth, and sensing and actuating functions have been widely researched in real-time active vibration control [6][7][8], stress-wave based communication [9][10][11], and structural health monitoring [12][13][14][15][16]. Another attractive feature of a piezoceramic transducer is the coupling between its electric impedance and the host structure's mechanical impedance.…”

Section: Introductionmentioning

confidence: 99%

A Smart Washer for Bolt Looseness Monitoring Based on Piezoelectric Active Sensing Method

et al. 2016

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Piezoceramic based active sensing methods have been researched to monitor preload on bolt connections. However, there is a saturation problem involved with this type of method. The transmitted energy is sometimes saturated before the maximum preload which is due to it coming into contact with flat surfaces. When it comes to flat contact surfaces, the true contact area will easily saturate with the preload. The design of a new type of bolt looseness monitoring sensor, a smart washer, is to mitigate the saturation problem. The smart washer is composed of two annular disks with contact surfaces that are machined into convex and concave respectively, to eliminate the complete flat contact surfaces and to reduce the saturation effect. One piezoelectric patch is bonded on the non-contact surface of each annular disk. These two mating annular disks form a smart washer. One of the two piezoelectric patches serves as an actuator to generate an ultrasonic wave that propagates through the contact surface; the other one serves as a sensor to detect the propagated waves. The wave energy propagated through the contact surface is proportional to the true contact area which is determined by the bolt preload. The time reversal method is used to extract the peak of the focused signal as the index of the transmission wave energy; then, the relationship between the signal peak and bolt preload is obtained. Experimental results show that the focused signal peak value changes with the bolt preload and presents an approximate linear relationship when the saturation problem is experienced. The proposed smart washer can monitor the full range of the rated preload.

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“…It can be derived using Hamilton's principle and Lagrange variation theory. in [4], the system equations can be derived using Hamilton's principle and the assumed mode method; There is other modeling way: identification modeling, in [5], this study presents results of multimodal vibration suppression of a smart flexible cantilever beam with piezoceramic actuator and sensor by suing a pole placement controller; in [6], V. SETHI and G. SONG put forward subspace identification after acquiring a model frame. Moreover the control laws for vibration suppression vary from one application aim to another.…”

Section: Introductionmentioning

confidence: 99%

Vibration Control and Dynamical Model of a Thermal-Electrical-Mechanical Coupled Smart Cantilevered Beam

Zhang

Zhao

2011

AEF

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Abstract. Piezoelectric actuators used in vibration control and high precision control have been known widely in recent years. Especially in aeronautics and MEMS systems, their use is spread from vibration suppression to position control. In this paper, a finite element model (FEM) of a piezoelectric actuator and cantilever in thermal environment is presented to suppress vibration effectively. In other words, the finite element model is namely thermal-electrical-mechanical coupled FEM. Based on a 8-node plane finite element, the modal analysis, the harmonic analysis and the transient analysis have been obtained in the current work. Therefore a transfer function model will be attained through the harmonic analysis by identification method in order to control vibration by control law. In addition, the controller will be designed with the adaptive pole placement control (APPC). Finally, through simulation, the thermal influence is considerable for natural frequencies, harmonic response and free vibration. Moreover, the APPC is a significant plan to vibration control in the paper. IntroductionApplications of smart materials, such as piezoelectric materials, magnetostrictive materials, magneto-rheological fluids, electrorheological fluids and shape memory alloys, have been developed increasingly in recent years. Piezoelectric materials can be the most popular smart materials in actuators applications by reason of low power consumption, low weight, and ease in bonding with the structures. In [1], Meng, G., L. Ye, et al. present a scheme involving dynamic modeling of a smart structure, designing laws and closed-loop simulation in a finite element environment. Actually, the piezoelectric materials and the structures will expand with heat and contract with cold, the piezoelectric materials will produce voltage when the temperature value is difference in both ends and the piezoelectric materials will generate heat when applied high voltage. In [2], this paper presents the dynamic analysis of the influence of the coupling between thermal, electrical and mechanical fields for different modes; in [3], in this paper a finite element model is developed for the active control of thermally induced vibration of laminated composite shells with piezoelectric sensors and actuators.There are many methods to model the system's dynamical model. First, the theory method is common in many researches. The finite element model is mainstream means for mechanical systems in modern world. It can be derived using Hamilton's principle and Lagrange variation theory. in [4], the system equations can be derived using Hamilton's principle and the assumed mode method; There is other modeling way: identification modeling, in [5], this study presents results of multimodal vibration suppression of a smart flexible cantilever beam with piezoceramic actuator and sensor by suing a pole placement controller; in [6], V. SETHI and G. SONG put forward subspace identification after acquiring a model frame. Moreover the control laws for vibration suppression va...

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Optimal Vibration Control of a Model Frame Structure Using Piezoceramic Sensors and Actuators

Cited by 54 publications

References 20 publications

Cyclic Crack Monitoring of a Reinforced Concrete Column under Simulated Pseudo-Dynamic Loading Using Piezoceramic-Based Smart Aggregates

Cyclic Crack Monitoring of a Reinforced Concrete Column under Simulated Pseudo-Dynamic Loading Using Piezoceramic-Based Smart Aggregates

A Smart Washer for Bolt Looseness Monitoring Based on Piezoelectric Active Sensing Method

Vibration Control and Dynamical Model of a Thermal-Electrical-Mechanical Coupled Smart Cantilevered Beam

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