Mimicking the cochlear amplifier in a cantilever beam using nonlinear velocity feedback control

2014 ◽  
Vol 23 (7) ◽  
pp. 075019 ◽  
Author(s):  
Bryan S Joyce ◽  
Pablo A Tarazaga
Keyword(s):  
Feedback Control ◽  
Cantilever Beam ◽  
Cochlear Amplifier ◽  
Velocity Feedback ◽  
Nonlinear Velocity

Velocity Feedback with a Non-Collocated Pair of Sensor and Actuator for Tip Vibration Suppression of a Beam

2006 ◽  
Vol 321-323 ◽  
pp. 200-203
Author(s):  
Young Sup Lee ◽  
Ki Hong Shin
Keyword(s):  
Feedback Control ◽  
Cantilever Beam ◽  
Vibration Suppression ◽  
Piezoelectric Sensor ◽  
Test Beam ◽  
Velocity Feedback ◽  
Pzt Actuator ◽  
And Performance ◽  
The Stability ◽  
Tip Velocity

This paper presents a theoretical and experimental study of a non-collocated pair of piezopolymer PVDF sensor and piezoceramic PZT actuator, which are bonded on a cantilever beam, in order to suppress unwanted vibration at the tip of the beam. The PZT actuator patch was bonded near the clamped part and the PVDF sensor, which was triangularly shaped, was bonded on the other part of the beam. This is because the triangular PVDF sensor is known that it can detect the tip velocity of a cantilever beam. Because the arrangement of the sensor and actuator pair is not collocated and overlapped each other, the pair can avoid so called "in-plane coupling", which can be found at a matched piezoelectric sensor and actuator pair and restricts the stability and performance of direct velocity feedback control. The test beam is made of aluminum with the dimension of 200 × 20 × 2 mm. Before control, the sensor-actuator frequency response function is confirmed to have a nice phase response without accumulation in a reasonable frequency range of up to 5000 Hz. The feedback control attenuates the magnitude of the first two resonances in the error spectrum of about 6 -7 dB.

Electro-magneto wave propagation analysis of viscoelastic sandwich nanoplates considering surface effects

2016 ◽  
Vol 231 (2) ◽  
pp. 387-403 ◽  
Author(s):  
A Ghorbanpour Arani ◽  
M Jamali ◽  
AH Ghorbanpour-Arani ◽  
R Kolahchi ◽  
M Mosayyebi
Keyword(s):  
Zinc Oxide ◽  
Wave Propagation ◽  
Feedback Control ◽  
Graphene Sheet ◽  
Surface Effects ◽  
Structural Damping ◽  
Sensors And Actuators ◽  
Velocity Feedback ◽  
Oxide Layers ◽  
Propagation Analysis

The original formulation of the quasi-3D sinusoidal shear deformation plate theory (SSDPT) is here extended to the wave propagation analysis of viscoelastic sandwich nanoplates considering surface effects. The sandwich structure contains a single layered graphene sheet as core integrated with zinc oxide layers as sensors and actuators. The single layered graphene sheet and zinc oxide layers are subjected, respectively, to 2D magnetic and 3D electric fields. Structural damping and surface effects are assumed using Kelvin–Voigt and Gurtin–Murdoch theories, respectively. The system is rested on an elastic medium which is simulated with a novel model namely as orthotropic visco-Pasternak foundation. An exact solution is applied in order to obtain the frequency, cut-off and escape frequencies. A displacement and velocity feedback control algorithm is applied for the active control of the frequency through a closed-loop control with bonded distributed zinc oxide sensors and actuators. The detailed parametric study is conducted, focusing on the combined effects of the nonlocal parameter, magnetic field, viscoelastic foundation, surface stress, applied voltage, velocity feedback control gain and structural damping on the wave propagation behavior of nanostructure. Results depict that with increasing the structural damping coefficient, frequency significantly decreases.

Displacement and Velocity Feedback Control of a Beam with a Deadband Region

1989 ◽  
Vol 17 (4) ◽  
pp. 507-521 ◽  
Author(s):  
John C. Bruch ◽  
Sarp Adali ◽  
James M. Sloss ◽  
Ibrahim S. Sadek
Keyword(s):  
Feedback Control ◽  
Velocity Feedback

Investigation into the linear velocity response of cantilever beam embedded with impact damper

2019 ◽  
Vol 25 (7) ◽  
pp. 1365-1378 ◽  
Author(s):  
Yiqing Yang ◽  
Xi Wang
Keyword(s):  
Cantilever Beam ◽  
Continuous System ◽  
Linear Velocity ◽  
Superposition Method ◽  
Momentum Exchange ◽  
Impact Damper ◽  
Mode Superposition Method ◽  
Velocity Response ◽  
The Impact ◽  
Nonlinear Velocity

The impact damper causes momentum exchange between the primary structure and impact mass, and achieves vibration attenuation through repeated collisions. A cantilever beam embedded with the impact damper is modeled in the form of a continuous system, and the equations of motion are formulated based on the mode superposition method. The mechanism of the impact damper is investigated, and linear velocity response is achieved by a proper selection of a mass ratio of 8.4%, clearance within 0.30 mm, and excitation force ranged from 3.2 N to 5.5 N. The reverse collision has higher damping than co-directional collision, based on which a new criterion of response regimes is proposed for the design of the impact damper. The velocity responses of the damped cantilever beam under sinusoidal and impulse excitation are simulated and verified via the sinusoidal sweep experiments. The velocity amplitudes of the damped cantilever beam are linearly decreased when the clearance is increased within 0.30 mm. Finally, linear and nonlinear velocity responses of the damped cantilever beam are discussed. It is found that the nonlinear velocity response reaches larger damping, but that a strongly modulated response exists.

scholarly journals Yaw Velocity Feedback Control of Four-Wheel Steering Car by Neural Network.

1993 ◽  
Vol 59 (562) ◽  
pp. 1745-1750
Author(s):  
Toshinari Shiotsuka ◽  
Kazuo Yoshida ◽  
Akio Nagamatsu ◽  
Mitsuru Nagaoka
Keyword(s):  
Neural Network ◽  
Feedback Control ◽  
Velocity Feedback
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