Planar locomotion of a vibration-driven system with two internal masses

Zhan, Xianxu; Xu, Jian; Fang, Hongbin

doi:10.1016/j.apm.2015.06.016

Cited by 25 publications

(8 citation statements)

References 15 publications

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“…where f Qi , the amplitude of the exciting force, is subjected to i node; w E is the ignition excitation frequency of the engine; and w i is the natural frequency of the i item. Equation (21) shows that having the ignition excitation frequency of the engine close to the natural frequency of the rigid member can easily cause the resonance of the rigid part, causing greater jitter. erefore, combining with equation (22) shows that reasonable arrangement of the mass and sti ness of the rigid member can easily make the natural frequency of the rigid member to deviate from the ignition excitation frequency of the the engine and avoid the occurrence of resonance.…”

Section: Vibration Reduction Design Of Steering Fixed Supportmentioning

confidence: 99%

“…However, many defects existed in the methods listed above can be concluded as follows: one the one hand, the accurate mathematical model requires a large number of specific parameters in the model and the error between the parameter value and the actual model is also hard to meet the design standard. Because of the high complexity of mathematical modeling [19,20] and too many external influencing factors [21]), dynamic digital modeling method is declined to rely on the design experience of designers, and the establishment of a complex isometric model for a complex multimember system requires a large design and adjustment period.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Research on a Multinode Joint Vibration Control Strategy for Controlling the Steering Wheel of a Commercial Vehicle

Tang

Ye³

et al. 2020

Shock and Vibration

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The vibration degree of a steering wheel has important reference significance for drivers to evaluate the ride comfort of the whole vehicle. To solve the jitter problem of the steering wheel of a commercial vehicle at idle speed, this work proposes a multinode joint vibration control strategy (MDVC) based on the associated vibration path of the steering wheel. Based on the analysis of the associated vibration transfer paths of the steering wheel, the whole vehicle was divided into a system comprising several nodes. For the decomposed node system, taking the vibration transmission path associated with the target as the research direction, the vibration reduction design of each node system is analyzed step by step. After exploring the possible causes of abnormal vibration of the steering wheel through experimental tests, the abnormal node structure interval was determined. By further extracting the structural model of the steering system from the vehicle, the hammering method was applied to test its modal and related frequency. Furthermore, an improved structure of steering support was also designed, and its fitting degree and modal characteristics were analyzed and compared to the original scheme. The following test results show that the structure improvement greatly reduces the vibration level of the steering wheel, meets the ideal design requirements of the steering wheel vibration reduction, and provides the possibility of weighing the correlation between these hierarchical node systems in whole vehicle.

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Section: Vibration Reduction Design Of Steering Fixed Supportmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Research on a Multinode Joint Vibration Control Strategy for Controlling the Steering Wheel of a Commercial Vehicle

Tang

Ye³

et al. 2020

Shock and Vibration

View full text Add to dashboard Cite

show abstract

“…Numerical simulations and experimental investigations of a vibration-driven capsule system under four different friction models were studied by Wang et al [22]. This group have also considered the planar locomotion of a vibration-driven capsule with two internal masses [23]. In the current paper, we will discuss our vibro-impact capsule, which employs additional internal impact to enhance progression [16], and analyse its dynamic characteristics in a pig small intestine.…”

Section: Introductionmentioning

confidence: 99%

Modelling of a vibro-impact self-propelled capsule in the small intestine

et al. 2019

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This paper studies the modelling of a vibroimpact self-propelled capsule system in the small intestinal tract. Our studies focus on understanding the dynamic characteristics of the capsule and its performance in terms of the average speed and energy efficiency under various system and control parameters, such as capsule's radius and length, and the frequency and magnitude of sinusoidal excitation. We find that the resistance from the small intestine will become larger once the capsule's size or its instantaneous velocity increases. From our extensive numerical calculations, it is suggested that increasing forcing magnitude or choosing forcing frequency greater than the natural frequency of the inner mass can benefit the average speed of the capsule, and the radius of the capsule should be slightly larger than the radius of the small intestine in order to generate a reasonable resistance for capsule progression. Finally, the locomotion of the capsule along an inclined intestinal tract is tested, and the best radius and forcing magnitude of the capsule are also determined.

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“…A box-like robot, which were subjected to the Coulomb dry friction and nonholonomic constrains, containing two inner masses moving orthogonally, was designed by Zhan et al . [ 13 ]. The robot was implemented two-dimensional motions on a plane, such as translation and rotation without sideslips.…”

Section: Introductionmentioning

confidence: 99%

Proof-of-concept prototype development of the self-propelled capsule system for pipeline inspection

et al. 2017

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This paper studies the prototype development for the self-propelled capsule system which is driven by autogenous vibrations and impacts under external resistance forces. This project aims for proofof-concept of its locomotion in pipeline environment in order to mitigate the technical complexities and difficulties brought by current pressure-driven pipeline inspection technologies. Non-smooth multibody dynamics is applied to describe the motion of the capsule system, and two non-smooth nonlinearities, friction and impact, are considered in modelling. The prototype of the self-propelled capsule system driven by a push-type solenoid with a periodically excited rod has been designed to verify the modelling approach.The prototype contains a microcontroller, a power supply, and a wireless control module, which has been tested in a clear uPVC pipe via remote control. Various control parameters, e.g. impact stiffness, frequency and amplitude of excitation, are studied experimentally, and finally, the fastest progression of the system is obtained.

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Planar locomotion of a vibration-driven system with two internal masses

Cited by 25 publications

References 15 publications

Research on a Multinode Joint Vibration Control Strategy for Controlling the Steering Wheel of a Commercial Vehicle

Research on a Multinode Joint Vibration Control Strategy for Controlling the Steering Wheel of a Commercial Vehicle

Modelling of a vibro-impact self-propelled capsule in the small intestine

Proof-of-concept prototype development of the self-propelled capsule system for pipeline inspection

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