The effect of inertial mass and excitation frequency on a Duffing vibro-impact drifting system

Nguyen, Van-Du; Duong, The-Hung; Chu, Ngoc-Hung; Ngo, Quoc-Huy

doi:10.1016/j.ijmecsci.2017.02.023

Cited by 25 publications

(9 citation statements)

References 24 publications

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“…Pipeline inspection devices are capable of moving independently with or against product flow, which therefore yield significant advantages over traditional pressuredriven PIGs in certain situations. As a result, autogenously driven capsule systems [4][5][6][7] have been an area of increasing scientific activity in recent years. The ability to move independently without any external mechanisms, such as wheels and arms, makes such a system ideally suited to move in harsh and complex environments where external moving parts may either pose a hazard to the surroundings or be broken, corroded or blocked up by the working environment.…”

Section: Introductionmentioning

confidence: 99%

Optimization and experimental verification of the vibro-impact capsule system in fluid pipeline

Yan

Liu

Jiang

et al. 2018

Proceedings of the Institution of Mechanical Engineers, Part C:

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This paper studies the prototype development of the vibro-impact capsule system aiming for autonomous mobile sensing for pipeline inspection. Self-propelled progression of the system is obtained by employing a vibro-impact oscillator encapsuled in the capsule without the requirement of any external mechanisms, such as wheels, arms, or legs. A dummy capsule prototype is designed, and the best geometric parameters, capsule and cap arc lengths, for minimizing fluid resistance forces are obtained through two-dimensional and three-dimensional computational fluid dynamics analyses, which are confirmed by wind tunnel tests. In order to verify the concept of self-propulsion, both original and optimized capsule prototypes are tested in a fluid pipe. Experimental results are compared with computational fluid dynamics simulations to confirm the efficacy of the vibro-impact self-propelled driving.

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Section: Introductionmentioning

confidence: 99%

Optimization and experimental verification of the vibro-impact capsule system in fluid pipeline

Yan

Liu

Jiang

et al. 2018

Proceedings of the Institution of Mechanical Engineers, Part C:

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“…This principle was first time proposed and analyzed by Pavlovskaia et al [15]. Many studies have been made, using various types of the actuators, such as using a solenoid driven by an RLC circuit [16,17], electromagnetic device [18,19], linear motors [20], electro-dynamic shaker [21,22]. The expected direction of the system motion can be obtained by applying a position feedback controller [23] or reversing the impact side [24].…”

Section: Introductionmentioning

confidence: 99%

“…A rich and complex dynamic response of the vibroimpact system was confirmed, as a result of the co-existence of non-smooth friction and the impact force [25,26]. The system response has been found to be either periodic, quasiperiodic and chaotic response, and thus required a careful design [21] and/or parameter selection [27] to make the system work stable. However, experimental studies on the effects of the environment friction as well as the interaction between the friction and the excitation force on the system response have rarely been found [14,16].…”

Section: Introductionmentioning

confidence: 99%

A comparative study on the two vibration driven locomotion systems in various friction levels

Nguyen

2021

Vietnam J. Mech.

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This paper presented comparison results of two locomotion models: a pure-vibration driven and a vibro-impact driven system. In experiments, the friction force can be varied without changing the internal and the body masses. The mathematical models of the two systems were developed and experimentally verified. Using dimensionless models, the results can be expanded to other sizes in practice. The two models were compared in the following aspects: the progression rate, the motion direction and the dynamics response. The effect of friction as an important variable on the dynamic response of the two scaled models were examined and compared by means of bifurcation analysis and basin of attraction. It has been found that, the pure-vibration can provide forward motion better than the vibro-impact does. The highest progression rate of the vibro-impact was less than that of the pure-vibration system in the investigated ranges of input parameters. Besides, the pure-vibration always has period-1 motion, whereas the vibro-impact system has a rich and complex dynamic response, including period-1, period-2 as well as chaotic motions. The results obtained would be useful for design and operating the self-propelled locomotion systems.

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“…Once the net force of their interaction is greater than the environmental resistance, rectilinear motion of the entire system can be obtained. To implement this, various driving means for the small body were proposed by researchers, such as vibration-driven [5,6], vibro-impact driven [7][8][9][10], and pendulum-like driven [11][12][13]. The common feature of these methods is that the small body needs to be controlled precisely in order to obtain a desired motion for the entire system.…”

Section: Introductionmentioning

confidence: 99%

The vibro-impact capsule system in millimetre scale: numerical optimisation and experimental verification

et al. 2020

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The vibro-impact capsule system has been studied extensively in the past decade because of its research challenges as a piecewise-smooth dynamical system and broad applications in engineering and healthcare technologies. This paper reports our team’s first attempt to scale down the prototype of the vibro-impact capsule to millimetre size, which is 26 mm in length and 11 mm in diameter, aiming for small-bowel endoscopy. Firstly, an existing mathematical model of the prototype and its mathematical formulation as a piecewise-smooth dynamical system are reviewed in order to carry out numerical optimisation for the prototype by means of path-following techniques. Our numerical analysis shows that the prototype can achieve a high progression speed up to 14.4 mm/s while avoiding the collision between the inner mass and the capsule which could lead to less propulsive force on the capsule so causing less discomfort on the patient. Secondly, the experimental rig and procedure for testing the prototype are introduced, and some preliminary experimental results are presented. Finally, experimental results are compared with the numerical results to validate the optimisation as well as the feasibility of the vibro-impact technique for the potential of a controllable endoscopic procedure.

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The effect of inertial mass and excitation frequency on a Duffing vibro-impact drifting system

Cited by 25 publications

References 24 publications

Optimization and experimental verification of the vibro-impact capsule system in fluid pipeline

Optimization and experimental verification of the vibro-impact capsule system in fluid pipeline

A comparative study on the two vibration driven locomotion systems in various friction levels

The vibro-impact capsule system in millimetre scale: numerical optimisation and experimental verification

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