Characteristic Evaluation of Linear Resonant Actuator Utilizing Electrical Resonance

Sensorless Resonance Tracking of Resonant Electromagnetic Actuator through Back-EMF Estimation for Mobile Devices

Resonant electromagnetic actuators have been broadly used as vibration motors for mobile devices given their ability of generating relatively fast, strong, and controllable vibration force at a given resonant frequency. Mechanism of the actuators that is based on mechanical resonance, however, limits their use to a situation where their resonant frequencies are known and unshifted. In reality, ...

Evaluation of Various Permanent Magnet Arrangements on Linear Actuator

Linear actuator are used to provide linear motion in the absence of a motion translator. By using the linear actuator, the linear motion can be produce with high degree of efficiency. Linear actuators can be designed with and without slots; moreover, there are various types of magnetization arrangements can be applied to the mover. In this paper, ten different magnetization arrangements were us...

Simulation of Characteristic of Linear Degradation with Failure Modes

Active Authority Enhancement of Piezoelectric Actuator Design via Mechanical Resonance and Electrical Tailoring

In this research, a new approach is proposed to enhance the authority of piezoelectric actuators without the trade off between force and stroke. Through mechanical tailoring, the resonance frequencies of the actuator system can be tuned to the required actuation frequencies. This obviously will increase the authority (both stroke and force) of the actuator. However, resonant actuators could be ...

Nonlinear Parameter Identification of a Resonant Electrostatic MEMS Actuator

We experimentally investigate the primary superharmonic of order two and subharmonic of order one-half resonances of an electrostatic MEMS actuator under direct excitation. We identify the parameters of a one degree of freedom (1-DOF) generalized Duffing oscillator model representing it. The experiments were conducted in soft vacuum to reduce squeeze-film damping, and the actuator response was ...