Character of changes of slip regimes in experiments on laboratory spring-slider system under external weak periodical forcing have been investigated. Here we report the experimental evidence of phase synchronization in slip dynamics, induced by external periodic electromagnetic EM impact. This is a preview of subscription content, log in to check access. Rent this article via DeepDyve. Pikovsky, A. Google Scholar. Rosenblum, M. Chelidze, T. Kantz, H. CUP Cambridge, Cover, T.
Wiley, New York, Download references. Correspondence to T. Reprints and Permissions. Electromagnetic Synchronization of Slip.
Nonlinear Dyn 44, — Download citation. Received : 24 August Accepted : 19 April Issue Date : June Search SpringerLink Search. Abstract Character of changes of slip regimes in experiments on laboratory spring-slider system under external weak periodical forcing have been investigated.ANNEX 4.
Final Report: May, — May, The construction of experimental apparatus for study of impact of EM-pulses on mechanical stability of faulted rock began at Institute of Geophysics. As the EM-impact is weak in comparison with tectonic stresses, it can influence seismicity only if the fault is close to critical situation trigger effect.
We can very approximately assess the intensity of electrical field induced by MHD-source in the depth, using expression for, say, radial component of dipole field in the point P:.
It is evident that even in near zone from the dipole the EM-impact is quite small. Thus, in order to simulate MHD-quake effects in laboratory, it is necessary to have a mechanical system, close to critical unstable state. Mechanical part, which provides closeness to critical state. In our model the critical state is realized by a fixed inclined surface bedrock on which is placed the upper piece of rock. The slope of the plane can be regulated by 15''-steps Fig. Additionally, the critical state can be achieved by pulling the mobile sample on the horizontal support by regulating spring tension.
Here 1- is testing frame, 2 — is supporting sample, 3 — is mobile slipping sample, 4 — is the frame for spring tests, 5 — is the angle measuring unit, 6 — is counterweight, 7 — is driving mechanism, 8 — is embedding fluid, 9 — bath. The system can work in dry and water-saturated versions. In latter case the whole system will be immersed in the bath with water. Now the main part of the system, the frame with varying inclination is ready.
Generator of EM-pulses. The simple assessment of dipole field intensity in MHD-experiments for homogeneous half-space at the depth of km gives very small values of order of several volts per meter.
Nevertheless it should be taken into account that. MHD-pulses may affect the pore pressure in cracks and invoke electrokinetic flow. Taking into account these considerations, the generator of EM-pulses with output from several volts to several hundreds has been constructed. For obtaining pulses of given form and amplitude the output of standard pulse generator is connected to amplifier in order to get pulses up to v.
The duration of pulses and the frequency of their recurrence is regulated by standard pulse generator; the amplitude is regulated by amplifier Fig. The electrical component is now ready for testing.
Unit for recording of mechanical instabilities generated by EM-pulses. This is planned to do by. Recording of acoustic pulses induced by stick-slip of upper block of rock on the support. Recording of displacement of upper rock specimen induced by EM-pulse. This part will be realized in December-January. The support and the slipping block will be made from:. Glass, 2 marble; 3 basalt; 4 granite. The specimens will be prepared in December. Introduction: Mechanisms of MHD-quakes: a phenomenological approach.
In the experiments, initially aimed to finding resisitivity precursors of strong earthquakes in the upper layers of Earth crust by MHD-sounding an unexpected effect of microseismicity activation has been discovered Tatasov et al, The activation of acoustic emission by electromagnetic field has been also observed in laboratory experiments G.
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The Study of Electromagnetic Slip Clutch Application in Step Less Speed Regulation of Small Cars
Tchelidze, V. Chikhladze, T. Abstract Recently Russian seismologists reported the triggering effect of MHD soundings on microseismic activity in the Central Asia test area. The paper focuses on an experimental test of the possibility of triggering the mechanical instability of a system that is close to critical state by a series of electromagnetic pulses.
The mechanical system consisted of two pieces of rock;the upper piece can slip on the fixed supporting sample if the latter one is tilted up to the critical angle.
In this state,the triggering of mechanical instability by some weak impact such as electrical pulse became more probable. The slope of support in the experiment is an analogue of tectonic stress in natural conditions. Keywords electromagnetic triggering;mechanical Instability. Full Text: PDF.For the current situation of automatic transmission technology which applied to small cars, it proposes a concept that electromagnetic slip clutch achieves step less speed regulation of small cars, describes its technical principle and feasibility, analysis the mechanical properties of electromagnetic slip clutch, at sometimes, the article proposes mathematical modeling technology for the electronic control system of electromagnetic slip clutch, and structures software and hardware design platform with C and 32 microcontroller.
Finally, it confirms the research value of electromagnetic slip clutch for the step less speed regulation of small cars. Request Permissions. The development status of the vehicle automatic transmission [J]. Hefei University of Technology, 12 : Technology and application of modern automotive automatic transmission[J].
Of Automotive Engineers, 9 : Electromechanical control[M]. Beijing: Science Press, Research and application of electromagnetic speed electric traction shearer [J]. Coal Science and Technology, 5 : Electromagnetic slip clutch in the motor speed [J]. Coal Science and Technology6 : All Rights Reserved. Registration Log In. Paper Titles. Manufacturing Information Model for Design for Manufacturing p. Article Preview. Abstract: For the current situation of automatic transmission technology which applied to small cars, it proposes a concept that electromagnetic slip clutch achieves step less speed regulation of small cars, describes its technical principle and feasibility, analysis the mechanical properties of electromagnetic slip clutch, at sometimes, the article proposes mathematical modeling technology for the electronic control system of electromagnetic slip clutch, and structures software and hardware design platform with C and 32 microcontroller.
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Electromagnetic Synchronization of Slip
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