Experimental verification of the vibro-impact capsule model

Liu, Yang; Pavlovskaia, Ekaterina; Wiercigroch, Marian

doi:10.1007/s11071-015-2385-6

Cited by 81 publications

(44 citation statements)

References 19 publications

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“…solenoid [29]). It is worth noting that the interaction between the rod (m 1 ) and the main body (m 2 ) of the actuator is approximated using a linear spring and a viscous damper in this paper, and the verification of such assumption was carried out in [17]. On the right of the internal mass, a weightless plate is connected to the capsule by a linear spring with stiffness k 1 , and a secondary weightless plate is connected to the capsule by a linear spring with stiffness k 2 on the left of the internal mass.…”

Section: Description Of the Capsule Systemmentioning

confidence: 99%

“…Vetchanin et al [16] investigated the characteristics of motion of a rigid body with variable internal mass distribution in a viscous fluid, showing the possibility of self-propulsion of the body in an arbitrary given direction. In [17], experimental verification of the vibro-impact capsule system was carried out. The conducted bifurcation analyses indicated that a fine tuning of the control parameters, such as the stiffness of the support spring, and the frequency and the amplitude of excitation, can significantly improve the average rate of progression.…”

Section: Introductionmentioning

confidence: 99%

“…The dynamics of the vibro-impact capsule system, which consists of a capsule main body interacting with a harmonically driven internal mass, has been studied extensively by Liu et al [8][9][10][17][18][19][20]. In [8], the model of the vibro-impact capsule system was firstly studied to provide a fundamental understanding of its dynamics.…”

Section: Introductionmentioning

confidence: 99%

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A comparative study of the vibro-impact capsule systems with one-sided and two-sided constraints

2017

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This paper studies the dynamics of the vibro-impact capsule systems with one-sided and twosided soft constraints under variations of various system and control parameters, including mass ratio, stiffness ratio, gap of contact, and amplitude and frequency of external excitation. The aim of this study is to optimise the progression speed and energy consumption of the capsule and minimise the required cabin length for prototype design used for engineering pipeline inspection. Our studies focus on three systems: the capsule with a right constraint, the capsule with a right and a weak left constraints, and the capsule with a right and a strong left constraints. Bifurcation analyses show that the behaviour of the capsule with onesided constraint is mainly periodic, and the dynamic responses of the other two capsules with two-sided constraints become complex when the stiffness of the left constraint increases. Based on our extensive comparisons, the following optimisation strategies are recommended. When the capsule speed is paramount, one can employ the two-sided capsule with a weak left constraint under large amplitude of excitation. When energy consumption is taken into account, the onesided capsule is preferable. When a miniaturized prototype is needed, the two-sided capsule with a strong left constraint is the best choice.

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Section: Description Of the Capsule Systemmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A comparative study of the vibro-impact capsule systems with one-sided and two-sided constraints

2017

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“…The dynamics of the vibro-impact capsule system, which consists of a capsule main body interacting with a harmonically driven internal mass, has been studied extensively by Liu et al [5][6][7][8][9][10][11]. In [5], the model of the vibro-impact capsule system was firstly studied to provide a fundamental understanding of its dynamics.…”

Section: Introductionmentioning

confidence: 99%

Optimization of the Vibro-Impact Capsule System for Promoting Progression Speed

2018

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Abstract. This paper studies the dynamics of vibro-impact capsule systems with one-sided and double-sided constraints under variations of control parameters, including frequency of excitation, mass ratio, and stiffness ratio. The aim of this study is to optimize the progression speed of the capsule system. Extensive comparisons reveal that the capsule system with one-sided constraint is better than the one with double-sided constraints in terms of progression speed. Moreover, the system's period-one one-right-impact motion is proved as the ideal vibration condition due to its lowest energy consumption for impacts. According to the dynamic analyses of control parameters, an inner mass with its weight similar as the weight of capsule and a right constraint with a relative weak stiffness are beneficial for further accelerating the capsule system forwards.

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“…The capsule was found to be monostable when the environmental resistance was modeled via Coulomb friction. An experimental verification of the capsule model was carried out in [29] by using a novel experimental rig. In [30], various friction models were considered to represent the resistance of the surrounding medium of the capsule.…”

Section: Introductionmentioning

confidence: 99%

Controlling multistability in a vibro-impact capsule system

Liu

Chávez

2017

Nonlinear Dyn

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This work concerns the control of multistability in a vibro-impact capsule system driven by a harmonic excitation. The capsule is able to move forward and backward in a rectilinear direction, and the main objective of this work is to control such motion in the presence of multiple coexisting periodic solutions. A position feedback controller is employed in this study, and our numerical investigation demonstrates that the proposed control method gives rise to a dynamical scenario with two coexisting solutions, corresponding to forward and backward progression. Therefore, the motion direction of the system can be controlled by suitably perturbing its initial conditions, without altering the system parameters. To study the robustness of this control method, we apply numerical continuation methods in order to identify a region in the parameter space in which the proposed controller can be applied. For this purpose, we employ the MATLAB-based numerical platform COCO, which

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Experimental verification of the vibro-impact capsule model

Cited by 81 publications

References 19 publications

A comparative study of the vibro-impact capsule systems with one-sided and two-sided constraints

A comparative study of the vibro-impact capsule systems with one-sided and two-sided constraints

Optimization of the Vibro-Impact Capsule System for Promoting Progression Speed

Controlling multistability in a vibro-impact capsule system

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