Vibroimpact mechanism in one separate case

Ragulskis, K.; Ragulskis, L.

doi:10.21595/mme.2019.20818

Cited by 6 publications

(6 citation statements)

References 43 publications

(43 reference statements)

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“…Vibratory drives and their use in robots are investigated in [2]. Vibrators of vibro impact type and their resonant zones are analysed in [3]. Nonlinear systems and their stabilisation are described in [4].…”

Section: Introductionmentioning

confidence: 99%

Investigation of Soft Impacts in Elements of Pipe Robots

Ragulskis

Spruogis

Bogdevičius

et al. 2022

mech

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Vibrators with deformable impact support under harmonic excitation are especially useful in the case when their stationary regimes of motion are stable. This is useful in practice by applying those vibrators to single direction manipulators and various robots of space type. For practical application it is necessary to reveal dynamical qualities of the system from where it would be possible to determine optimal regimes. For this purpose investigations of dynamics of the system by numerical methods were performed. Investigation of dynamics of impact interactions in elements of robots is an important engineering problem. Dynamics of soft impacts in elements of manipulators and robots is investigated. The model of the investigated system is described. Numerical investigations for various parameters of the system are performed. Free and forced vibrations are investigated. From the presented results it can be noted that for the smaller values of the coefficient of stiffness of the support period of steady state motion coincides with the period of the exciting force, while for the higher values of the coefficient of stiffness of the support period of steady state motion is equal to two periods of the exciting force. Thus it is concluded that with the increase of the coefficient of stiffness of the support behavior of the investigated vibro impact system with soft impacts experiences essential changes. Main characteristics of steady state motion as functions of frequency of excitation are investigated. From the presented results the minimum and maximum inter impact intervals as functions of frequency of excitation, minimum and maximum velocities before impact as functions of frequency of excitation, minimum and maximum minimum displacements in inter impact intervals as functions of frequency of excitation are seen. Three resonant zones of expected single valued motions are observed in the presented results. They correspond to optimal regions of operation of the vibro impact system with soft impacts. Results of the performed analysis of dynamic interactions with soft impacts in the elements of manipulators and robots are used in the process of design of pipe robots of advanced type.

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Section: Introductionmentioning

confidence: 99%

Investigation of Soft Impacts in Elements of Pipe Robots

Ragulskis

Spruogis

Bogdevičius

et al. 2022

mech

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“…For investigation and creation of manipulators and on their basis vibrators with discontinuous elements were developed in order to increase their effective operation [3 -7]. It is shown that vibrators of vibro impact type in separate case of the nonlinearity work in the zone of resonance with linear frequency spectrums [3] in this way ensureing stable operation of the system in the resonance zones. Asymptotic stabilisation of periodic regimes ensures stable operation of the system.…”

Section: Introductionmentioning

confidence: 99%

Mechanical systems of precise robots with vibrodrives, the vibrating mass of the exciting force of which performs impacts into deformable support and direction of the exciting force coincides with the line of relative motion of the system

Ragulskis

Spruogis

Bogdevičius

et al. 2021

mech

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Manipulator consisting from one sided self stopping mechanism and two masses which interact through an elastic – dissipative member is investigated. The drive of the manipulator is the generator of mechanical vibrations. With such elements the system is nonlinear. A separate case is investigated when static positions of equilibrium of both masses are located in one point. Because of this spectrums of eigenfrequencies are linear and infinite. All those facts mean that the operation of the manipulator is optimal. Fast development of robots gives rise to the investigations of increasing intensity creating various types of robots especially in the area of high precision. Mechanical systems of robot must perform laws and trajectories of motion, positioning in space with highest possible precision as well as ensure dynamicity of highest possible stability. Those aims are achieved in the presented paper by creating a structure of the best design, based on vibroimpacts as well as by choosing corresponding nonlinear parameters of the system. The investigation is performed by analytical – numerical method. The obtained results enable to create mechanical systems for precise robots.

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“…Isolated resonances with nonlinear damping are analysed in [13]. A separate case of the vibro impact mechanism is investigated in [14].…”

Section: Introductionmentioning

confidence: 99%

Forced vibrations of vibro impact system with zero tightening with harmonic resonant excitation

Ragulskis¹,

Ragulskis²

2021

Math. models, eng.

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An important problem for engineering practical applications is investigated: namely dynamics of the system by taking into account dissipative forces and with an aim that those steady state vibrations should be stable and single valued. This is achieved by choosing suitable parameters of the investigated system. Forced vibrations of vibro impact system with zero tightening with harmonic resonant excitation are investigated. Results for various typical parameters of the analysed system are presented. Dependence of characteristics of motion in steady state regime from the main parameters of the investigated system is investigated. The obtained results are useful in the process of design of vibro impact systems for use in technologies and machines of corresponding type.

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Vibroimpact mechanism in one separate case

Cited by 6 publications

References 43 publications

Investigation of Soft Impacts in Elements of Pipe Robots

Investigation of Soft Impacts in Elements of Pipe Robots

Mechanical systems of precise robots with vibrodrives, the vibrating mass of the exciting force of which performs impacts into deformable support and direction of the exciting force coincides with the line of relative motion of the system

Forced vibrations of vibro impact system with zero tightening with harmonic resonant excitation

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