Active vibration control in human forearm model using paired piezoelectric sensor and actuator

Hosseini, Sayed Masoud; Kalhori, Hamed; Al-Jumaily, Adel

doi:10.1177/1077546320957533

Cited by 15 publications

(10 citation statements)

References 55 publications

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“…Similarly, using various motors or pumps to attenuate tremors in different directions is a challenge that is addressed using the MMS mechanism [56]. Furthermore, using rigid parts for wearable devices is a disadvantage that is overcome by utilizing soft actuators [58,60].…”

Section: Discussionmentioning

confidence: 99%

“…In 2019, Hosseini et al designed a hand suppressor (active) with piezoelectric actuators and sensors on the top and bottom side of the arm [58]. The tremor data were collected through the piezoelectric layer, analyzed, and then mitigated using a proportional-derivative (PD) controller [58]. It was also reported that increasing the controller gain and piezoelectric constant can improve the efficiency of the attenuator.…”

Section: Active Mechanismsmentioning

confidence: 99%

“…Another research team has designed an active device by exploiting compliant and flexible dielectric elastomer stack actuators to simplify the wearing of tremor orthoses [63]. Additionally, Hosseini et al proposed paired piezoelectric sensors and actuators to build more compact and lightweight devices [58].…”

Section: Comparing Passive Semi-active and Active Mechanismsmentioning

confidence: 99%

“…Electro-responsive actuators, such as dielectric elastomers and piezoelectrics, are electrical-responsive materials that have attracted significant attention because of their low weight and flexibility. The successful integration of piezoelectric actuators and sensors to suppress hand tremors has been reported [58]. 3D-printed piezoelectric actuators have shown promising results and can be utilized in micro applications [131][132][133].…”

Section: Electro-responsive Actuatorsmentioning

confidence: 99%

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4D printing of soft orthoses for tremor suppression

et al. 2022

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Tremor is an involuntary and oscillatory movement disorder that makes daily activities difficult for affected patients. Hand tremor-suppression orthoses are noninvasive, wearable devices designed to mitigate tremors. Various studies have shown that these devices are effective, economical, and safe; however, they have drawbacks such as large weight, awkward shape, and rigid parts. This study investigates different types of tremor-suppression orthoses and discusses their efficiency, mechanism, benefits, and disadvantages. First, various orthoses (with passive, semi-active, and active mechanisms) are described in detail. Next, we look at how additive manufacturing (AM) has progressed recently in making sensors and actuators for application in tremor orthoses. Then, the materials used in AM are further analyzed. It is found that traditional manufacturing problems can be solved with the help of AM techniques, like making orthoses that are affordable, lighter, and more customizable. Another concept being discussed is using smart materials and AM methods, such as four-dimensional (4D) printing, to make orthoses that are more comfortable and efficient. Graphic abstract

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Section: Discussionmentioning

confidence: 99%

Section: Active Mechanismsmentioning

confidence: 99%

Section: Comparing Passive Semi-active and Active Mechanismsmentioning

confidence: 99%

Section: Electro-responsive Actuatorsmentioning

confidence: 99%

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4D printing of soft orthoses for tremor suppression

et al. 2022

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“…They provide sensing and actuating features, which make them appropriate materials for vibration control. PZT transducers have been widely used as sensors and actuators in active vibration control (AVC) systems owing to their special properties [ 9 , 10 , 11 , 12 , 13 ]. PZT transducers have been used in various shapes and forms, such as perfectly bounded layers along surfaces of structures or patches in different sizes.…”

Section: Introductionmentioning

confidence: 99%

Smart Active Vibration Control System of a Rotary Structure Using Piezoelectric Materials

Hashemi

Jang

Hosseini-Hashemi

2022

Sensors

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A smart active vibration control (AVC) system containing piezoelectric (PZT) actuators, jointly with a linear quadratic regulator (LQR) controller, is proposed in this article to control transverse deflections of a wind turbine (WT) blade. In order to apply controlling rules to the WT blade, a state-of-the-art semi-analytical solution is developed to obtain WT blade lateral displacement under external loadings. The proposed method maps the WT blade to a Euler–Bernoulli beam under the same conditions to find the blade’s vibration and dynamic responses by solving analytical vibration solutions of the Euler–Bernoulli beam. The governing equations of the beam with PZT patches are derived by integrating the PZT transducer vibration equations into the vibration equations of the Euler–Bernoulli beam structure. A finite element model of the WT blade with PZT patches is developed. Next, a unique transfer function matrix is derived by exciting the structures and achieving responses. The beam structure is projected to the blade using the transfer function matrix. The results obtained from the mapping method are compared with the counter of the blade’s finite element model. A satisfying agreement is observed between the results. The results showed that the method’s accuracy decreased as the sensors’ distance from the base of the wind turbine increased. In the designing process of the LQR controller, various weighting factors are used to tune control actions of the AVC system. LQR optimal control gain is obtained by using the state-feedback control law. The PZT actuators are located at the same distance from each other an this effort to prevent neutralizing their actuating effects. The LQR shows significant performance by diminishing the weights on the control input in the cost function. The obtained results indicate that the proposed smart control system efficiently suppresses the vibration peaks along the WT blade and the maximum flap-wise displacement belonging to the tip of the structure is successfully controlled.

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