Self-Excited Vibratory System for a Flutter Mechanism.

Ono, Kyosuke; Okada, Toru

doi:10.1299/jsmec.41.621

Cited by 7 publications

(3 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Actuators using the self-excitation phenomenon represent one of the potential solutions for miniaturized devices because the driving equipment can be miniaturized not to employ converters or other elements. Self-excited actuation brings higher robustness and efficiency to oscillatory motions, especially for micro robots and mechatronic devices [19]. Self-excited electrostatic actuators, which are also known as Franklin bell or Gordon bell, are one of the simplest self-excited oscillators.…”

Section: Introductionmentioning

confidence: 99%

Effect of elastic element on self-excited electrostatic actuator

Nabae

Ikeda

2018

Sensors and Actuators A: Physical

View full text Add to dashboard Cite

Self-excited electrostatic actuators, which are also called Franklin bells or Gordon bells, are one of the simplest oscillators among various types of actuators. The actuators oscillate with DC voltage and simple structures mainly composed of only two electrodes and a conductive armature. These features seem suitable for micro mechatronic devices, including micro robots; however, these actuators only have small number of practical applications. The high voltage for actuation, damage by electrical discharge, and mechanical loss with collisions between the armature and electrodes keep the actuators away from practical usages. This research focuses on the mechanical loss with collisions between the armature and electrodes and proposes a method for decreasing this loss by energy recovery with elastic elements. This study first conducts a model-based analysis of the behavior of the proposed system that combines the electrostatic self-excitation and the elastic elements. The results are then compared with the experimental results of a prototype actuator. The simple analysis predicted the increase of the oscillating frequency with the elastic elements, limiting the condition of the self-excitation caused by the energy loss of the damping factor. The results of the experimental verification showed the same tendency as the analytical predictions: increase of the oscillating frequency and existence of a critical value for the oscillation limit. Although comparatively large errors were confirmed between the simulation and the experiment under a lower applied voltage, experimentally obtained frequencies have errors less than 6.4% compared with the analytical result under the applied voltage of over 1.3 kV.

show abstract

Section: Introductionmentioning

confidence: 99%

Effect of elastic element on self-excited electrostatic actuator

Nabae

Ikeda

2018

Sensors and Actuators A: Physical

View full text Add to dashboard Cite

show abstract

“…In the last two decades, artificially generated self-excited oscillation has been widely utilized in several macro- and micro-mechanical applications. A few to mention are atomic force microscopy (AFM) (Kuroda et al., 2008; Okajima and Sekiguchi, 2003; Yabuno et al., 2008), ultrasonically assisted cutting (Babitsky et al., 2004), vibratory material transportation (Kurita et al., 2003), rotary drilling (Batako et al., 2003), bio-sensors (Lee et al., 2007), pick and place robots (Babitsky, 1995), a pipe-crawling robot (Li and He, 2007), vibratory machines (Kurita and Muragishi, 1997; Kurita et al., 1996a, 1996b), self-excited biped mechanisms (Ono et al., 2001, 2004), mass sensing (Yabuno et al., 2013), a flutter wing mechanism (a hypothetical model of an insect wing) (Ono and Okada, 1998), strain and stress transducers (Kwasniewski et al., 2012; Zook et al., 1996), mass measurements in microgravity conditions (Mizuno et al., 2009) and electrostatic field sensing (Kobayashi et al., 2012), etc.…”

Section: Introductionmentioning

confidence: 99%

Modal self-excitation in a class of mechanical systems by nonlinear displacement feedback

Malas

Chatterjee

2016

Journal of Vibration and Control

View full text Add to dashboard Cite

Many devices and processes utilize self-excited oscillation to enhance performance. Recently, much research work has been devoted to the induction of self-excited oscillation in mechanical systems by nonlinear feedback. The present paper investigates the efficacy of a displacement feedback technique in generating self-excited oscillation at the desired mode(s) in a multiple degrees-of-freedom mechanical system. The controller couples the system with a bank of second-order filters and generates the required control force as a nonlinear function of the filter output. The describing function method theoretically explores the dynamics of the system with the control law. The control cost of the controller is studied for the proper choice of the filter parameters. The analytical results are substantiated by the numerical simulation results. The present study reveals that the proposed control laws, if used in an appropriate way, can generate self-excited oscillation in the system at the desired mode(s).

show abstract

“…The operating principle of many machines, devices, sensors, and processes is mechanical vibration and, for the highest energy efficiency, these systems often operate in one of the normal modes of vibration. Some examples are ultrasonically assisted cutting (Babitsky et al, 2004), atomic force microscopy (AFM) (Okajima and Sekiguchi, 2003;Kuroda et al, 2008;Yabuno et al, 2008), rotary drilling (Batako et al, 2003), a pipe-crawling robot (Li and He, 2007), vibratory machines (Kurita et al, 1996a(Kurita et al, , 1996bKurita and Muragishi, 1997), vibratory material transportation (Kurita et al, 2003), pick and place robots (Babitsky, 1995), self-excited biped mechanisms (Ono et al, 2001(Ono et al, , 2004, flutter wing mechanism (hypothetical model of insect wing) (Ono and Okada, 1998), bio-sensors (Lee et al, 2007), strain and stress transducers (Zook et al, 1996;Kwasniewski et al, 2012), mass sensing (Yabuno et al, 2013), mass measurements in microgravity conditions (Mizuno et al, 2009), electrostatic field sensing (Kobayashi et al, 2012), etc.…”

Section: Introductionmentioning

confidence: 99%

Modeling and design of direct nonlinear velocity feedback for modal self-excitation in a class of multi degrees-of-freedom mechanical systems

Malas

Chatterjee

2016

Journal of Vibration and Control

View full text Add to dashboard Cite

The paper presents a new nonlinear control design methodology for inducing modal, self-excited oscillation in a class of multi degrees-of-freedom mechanical systems. The system is assumed to be fully actuated and the controller operates in a centralized fashion based on the direct nonlinear velocity feedback. The linear part of the controller is designed to assign negative modal damping in the mode to be excited and positive modal damping in other modes. The nonlinear modal interaction is investigated using averaging analysis and different excitation regimes are delineated in the control parameter space. The nonlinear part of the controller is optimized to minimize the control cost. Numerical simulations of the control system are performed to substantiate the analytical results and validate the accuracy of the design. The control method is also shown to have some degree of robustness against parametric variations over the nominal values.

show abstract

Self-Excited Vibratory System for a Flutter Mechanism.

Cited by 7 publications

References 2 publications

Effect of elastic element on self-excited electrostatic actuator

Effect of elastic element on self-excited electrostatic actuator

Modal self-excitation in a class of mechanical systems by nonlinear displacement feedback

Modeling and design of direct nonlinear velocity feedback for modal self-excitation in a class of multi degrees-of-freedom mechanical systems

Contact Info

Product

Resources

About