Application to rigid memory mechanisms of a variable internal dynamic damping model

Main Article Content

Florian Ion Tiberiu Petrescu
Relly Victoria Virgil Petrescu
صندلی اداری

Abstract

The paper presents a dynamic model that works with variable internal damping, applicable directly to rigid memory mechanisms. If the problem of elasticity is generally solved, the problem of system damping is not clear and well-established. It is usually considered a constant "c" value for the internal damping of the system and sometimes the same value c and for the damping of the elastic spring supporting the valve. However, the approximation is much forced, as the elastic spring damping is variable, and for the conventional cylindrical spring with constant elasticity parameter (k) with linear displacement with force, the damping is small and can be considered zero. It should be specified that damping does not necessarily mean stopping (or opposition) movement, but damping means energy consumption to brake the motion (rubber elastic elements have considerable damping, as are hydraulic dampers). Metal helical springs generally have a low (negligible) damping. The braking effect of these springs increases with the elastic constant (the k-stiffness of the spring) and the force of the spring (P0 or F0) of the spring (in other words with the arc static arrow, x0=P0/k). Energy is constantly changing but does not dissipate (for this reason, the yield of these springs is generally higher). The paper presents a dynamic model with a degree of freedom, considering internal damping of the system (c), damping for which it is considered a special function. More precisely, the cushioning coefficient of the system (c) is defined as a variable parameter depending on the reduced mass of the mechanism (m* or J reduced) and the time, ie, c depends on the derivative of m reduced in time. The equation of the differential movement of the mechanism is written as the movement of the valve as a dynamic response.

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Author Biography

Florian Ion Tiberiu Petrescu, IFToMM

Ph.D. Eng. Florian Ion T. PETRESCU

Senior Lecturer at UPB (Bucharest Polytechnic University), Theory of Mechanisms and Robots department,

Date of birth: March.28.1958; Higher education: Polytechnic University of Bucharest, Faculty of Transport, Road Vehicles Department, graduated in 1982, with overall average 9.63;

Doctoral Thesis: "Theoretical and Applied Contributions About the Dynamic of Planar Mechanisms with Superior Joints".

Expert in: Industrial Design, Mechanical Design, Engines Design, Mechanical Transmissions, Dynamics, Vibrations, Mechanisms, Machines, Robots.

Association:

Member ARoTMM, IFToMM, SIAR, FISITA, SRR, AGIR. Member of Board of SRRB (Romanian Society of Robotics).

References

ANGELES, J.; LOPEZ-CAJUN, C. (1988) Optimal synthesis of cam mechanisms with oscillating flat-face followers. Mechanism Mach. Theory, v. 23, n. 1, p. 1-6. doi:10.1016/0094-114X(88)90002-X

ANTONESCU, P. (2000) Mechanisms and Handlers, Printech Publishing House. Bucharest.

ANTONESCU, P.; PETRESCU, F. I. T. (1985) Analytical method of synthesis of cam mechanism and flat stick. Proceedings of the 4th International Symposium on Mechanism Theory and Practice (TPM’ 85), Bucharest.

ANTONESCU, P.; PETRESCU, F. I. T. (1989) Contributions to cinetoelastodynamic analysis of distribution mechanisms. SYROM’89, Bucharest.

ANTONESCU, P.; OPREAN, M.; PETRESCU, F. I. T. (1985a) Contributions to the synthesis of oscillating cam mechanism and oscillating flat stick. Proceedings of the 4th International Symposium on Theory and Practice of Mechanisms, (TPM’ 85), Bucharest.

ANTONESCU, P.; OPREAN, M.; PETRESCU, F. I. T. (1985b) At the projection of the oscillante cams, there are mechanisms and distribution variables. Proceedings of the V-Conference for Engines, Automobiles, Tractors and Agricultural Machines, I-Engines and Automobiles, (AMA’ 85), Brasov.

ANTONESCU, P.; OPREAN, M.; PETRESCU, F. I. T. (1986) Projection of the profile of the rotating camshaft acting on the oscillating plate with disengagement. Proceedings of the 3rd National Computer Assisted Designing Symposium in Mechanisms and Machine Bodies, (MOM’ 86), Brasov.

ANTONESCU, P.; OPREAN, M.; PETRESCU, F. I. T. (1987) Dynamic analysis of the cam distribution mechanisms. Proceedings of the Seventh National Symposium of Industrial Robots and Spatial Mechanisms (IMS’ 87), Bucharest.

ANTONESCU, P.; OPREAN, M.; PETRESCU, F. I. T. (1988) Analytical synthesis of Kurz profile, rotating flat cam cam. Machine Build. Rev. Bucharest.

ANTONESCU, P.; PETRESCU, F. I. T.; ANTONESCU, O. (1994) Contributions to the synthesis of the rotating cam mechanism and the tip of the balancing tip. Brasov.

ANTONESCU, P.; PETRESCU, F. I. T.; ANTONESCU, O. (1997) Geometrical synthesis of the rotary cam and balance tappet mechanism. Bucharest.

ANTONESCU, P.; PETRESCU, F. I. T.; ANTONESCU, O. (2000a) Contributions to the synthesis of the rotary disc-cam profile. Proceedings of the 8th International Conference on Theory of Machines and Mechanisms, (TMM’ 00), Liberec, Czech Republic, p: 51-56.

ANTONESCU, P.; PETRESCU, F. I. T.; ANTONESCU, O. (2000b) Synthesis of the rotary cam profile with balance follower. Proceedings of the 8th Symposium on Mechanisms and Mechanical Transmissions (MMT’ 000), Timişoara, p: 39-44.

ANTONESCU, P.; PETRESCU, F. I. T.; ANTONESCU, O. (2001) Contributions to the synthesis of mechanisms with rotary disc-cam. Proceedings of the 8th IFToMM International Symposium on Theory of Machines and Mechanisms, (TMM’ 01), Bucharest, ROMANIA, p: 31-36.

AVERSA, R.; PETRESCU, R. V.; APICELLA, A.; PETRESCU, F. I. T.; CALAUTIT, J. K.; MIRSAYAR, M. M.; BUCINELL, R.; BERTO, F.; AKASH, B. (2017a) Something about the V Engines Design. Am. J. Appl. Sci.; v. 14, n. 1, p. 34-52. doi:10.3844/ajassp.2017.34.52

AVERSA, R.; PETRESCU, R. V.; AKASH, B.; BUCINELL, R.; CORCHADO, J.; BERTO, F.; MIRSAYAR, M. M.; CHEN, G.; LI, S.; APICELLA, A.; PETRESCU, F. I. T. (2017b) Something about the Balancing of Thermal Motors. Am. J. Eng. Appl. Sci.; v. 10, n. 1, p. 200-217. doi:10.3844/ajeassp.2017.200.217

AVERSA, R.; PETRESCU, R. V.; APICELLA, A.; PETRESCU, F. I. T. (2017c) A Dynamic Model for Gears. Am. J. Eng. Appl. Sci.; v. 10, n. 2, p. 484-490. doi:10.3844/ajeassp.2017.484.490

AVERSA, R.; PETRESCU, R. V.; PETRESCU, F. I. T.; APICELLA, A. (2017d) Smart-Factory: Optimization and Process Control of Composite Centrifuged Pipes. Am. J. Appl. Sci.; v. 13, n. 11, p. 1330-1341. doi:10.3844/ajassp.2016.1330.1341

AVERSA, R.; TAMBURRINO, F.; PETRESCU, R. V.; PETRESCU, F. I. T.; ARTUR, M.; CHEN, G.; APICELA, A. (2017e) Biomechanically Inspired Shape Memory Effect Machines Driven by Muscle like Acting NiTi Alloys. Am. J. Appl. Sci.; v. 13, n. 11, p. 1264-1271. doi:10.3844/ajassp.2016.1264.1271

FAWCETT, G. F.; FAWCETT, J. N. (1974) Comparison of polydyne and non polydyne cams. In: Cams and cam mechanisms. Ed. J. Rees Jones, MEP, London and Birmingham, Alabama, 1974.

GIORDANA, F.; ROGNONI, V.; RUGGIERI, G. (1979) On the influence of measurement errors in the Kinematic analysis of cam. Mechanism Mach. Theory, v. 14, n. 5, p. 327-340. doi:10.1016/0094-114X(79)90019-3

HAIN, K. (1971) Optimization of a cam mechanism to give good transmissibility maximal output angle of swing and minimal acceleration. J. Mechanisms, v. 6, n. 4, p. 419-434. doi:10.1016/0022-2569(71)90044-9

JONES, J. R.; REEVE, J. E. (1974) Dynamic response of cam curves based on sinusoidal segments. In: Cams and cam mechanisms. Ed. J. Rees Jones, MEP, London and Birmingham, Alabama.

KOSTER, M. P. (1974) The effects of backlash and shaft flexibility on the dynamic behavior of a cam mechanism. In: Cams and cam mechanisms, Ed. J. Rees Jones, MEP, London and Birmingham, Alabama, 1974.

MIRSAYAR, M. M.; JONEIDI, V. A.; PETRESCU, R. V.; PETRESCU, F. I. T.; BERTO, F. (2017) Extended MTSN criterion for fracture analysis of soda lime glass. Eng. Fract. Mech.; n. 178, p. 50–59. doi:10.1016/j.engfracmech.2017.04.018

PETRESCU, R. V.; AVERSA, R.; AKASH, B.; BUCINELL, R.; CORCHADO, J.; BERTO, F.; MIRSAYAR, M. M.; CALAUTIT, J. K.; APICELA, A.; PETRESCU, F. I. T. (2017a) Yield at Thermal Engines Internal Combustion. Am. J. Eng. Appl. Sci.; v. 10, n. 1, p. 243-251. doi:10.3844/ajeassp.2017.243.251

PETRESCU, R. V.; AVERSA, R.; AKASH, B.; BUCINELL, R.; CORCHADO, J.; BERTO, F.; MIRSAYAR, M. M.; CALAUTIT, J. K.; APICELA, A.; PETRESCU, F. I. T. (2017b) Forces at Internal Combustion Engines. Am. J. Eng. Appl. Sci. v. 10, n. 2, p. 382-393. doi:10.3844/ajeassp.2017.382.393

PETRESCU, R. V.; AVERSA, R.; AKASH, B.; BUCINELL, R.; CORCHADO, J.; BERTO, F.; MIRSAYAR, M. M.; APICELA, A.; PETRESCU, F. I. T. (2017c) Gears-Part I. Am. J. Eng. Appl. Sci., v. 10, n. 2, p. 457-472. doi:10.3844/ajeassp.2017.457.472

PETRESCU, R. V.; AVERSA, R.; AKASH, B.; BUCINELL, R.; CORCHADO, J.; BERTO, F.; MIRSAYAR, M. M.; APICELLA, A.; PETRESCU, F. I. T. (2017d) Gears-Part II. Am. J. Eng. Appl. Sci., v. 10, n. 2, p. 473-483. doi:10.3844/ajeassp.2017.473.483

PETRESCU, R. V.; AVERSA, R.; AKASH, B.; BUCINELL, R.; CORCHADO, J.; BERTO, F.; MIRSAYAR, M. M.; APICELA, A.; PETRESCU, F. I. T. (2017e) Cam-Gears Forces, Velocities, Powers and Efficiency. Am. J. Eng. Appl. Sci., v. 10, n. 2, p. 491-505.doi: 10.3844/ajeassp.2017.491.505

PETRESCU, R. V.; AVERSA, R.; AKASH, B.; BUCINELL, R.; CORCHADO, J.; BERTO, F.; MIRSAYAR, M. M.; KOSAITIS, S.; ABU-LEBDEH, T.; APICELA, A.; PETRESCU, F. I. T. (2017f) Dynamics of Mechanisms with Cams Illustrated in the Classical Distribution. Am. J. Eng. Appl. Sci., v. 10, n. 2, p. 551-567. doi:10.3844/ajeassp.2017.551.567

PETRESCU, R. V.; AVERSA, R.; AKASH, B.; BUCINELL, R.; CORCHADO, J.; BERTO, F.; MIRSAYAR, M. M.; KOSAITIS, S.; ABU-LEBDEH, T.; APICELA, A.; PETRESCU, F. I. T. (2017g) Testing by Non-Destructive Control, Am. J. Eng. Appl. Sci., v. 10, n. 2, p. 568-583. doi:10.3844/ajeassp.2017.568.583

PETRESCU, R. V.; AVERSA, R.; APICELA, A.; PETRESCU, F. I. T. (2017h) Transportation Engineering. Am. J. Eng. Appl. Sci., v. 10, n. 3, p. 685-702. doi:10.3844/ajeassp.2017.685.702

PETRESCU, R. V.; AVERSA, R.; KOZAITIS, S.; APICELA, A.; PETRESCU, F. I. T. (2017i) The Quality of Transport and Environmental Protection, Part I. Am. J. Eng. Appl. Sci., v. 10, n. 3, p. 738-755. doi:10.3844/ajeassp.2017.738.755

PETRESCU, F. I. T.; CALAUTIT, J. K.; MIRASAYAR, M. M.; MARINKOVIC, D. (2015) Structural Dynamics of the Distribution Mechanism with Rocking Tappet with Roll. Am. J. Eng. Appl. Sci., v. 8, n. 4, p. 589-601. doi:10.3844/ajeassp.2015.589.601

PETRESCU, F. I. T.; PETRESCU, R. V. (2016) Otto motor dynamics. Geintec-Gestao Inovacao e Tecnologias, v. 6, n. 3, p. 3392-3406. doi:10.7198/geintec.v6i3.373

PETRESCU, F. I. T.; PETRESCU, R. V. (2014) Cam Gears Dynamics in the Classic Distribution. Ind. J. Manag. Prod., v. 5, n. 1, p. 166-185. doi:10.14807/ijmp.v5i1.133

PETRESCU, F. I. T.; PETRESCU, R. V. (2013a) An Algorithm for Setting the Dynamic Parameters of the Classic Distribution Mechanism. Int. Rev. Model. Simul., v. 6, n. 5, p. 1637-1641.

PETRESCU, F. I. T.; PETRESCU, R. V. (2013b) Dynamic Synthesis of the Rotary Cam and Translated Tappet with Roll. Int. Rev. Model. Simul., v. 6, n. 2, p. 600-607.

PETRESCU, F. I. T.; PETRESCU, R. V. (2013c) Cams with High Efficiency. Int. Rev. Mech. Eng., v. 7, n. 4, p. 599-606.

PETRESCU, F. I. T.; PETRESCU, R. V. (2013d) Forces and Efficiency of Cams. Int. Rev. Mech. Eng., v. 7, n. 3, p. 507-511.

PETRESCU, F. I. T.; PETRESCU, R. V. (2011) Dinamica mecanismelor de distributie. Create Space publisher, USA, (Romanian version), 2011. ISBN 978-1-4680-5265-7

PETRESCU, F. I. T.; PETRESCU, R. V. (2005a) Contributions at the dynamics of cams. In: Proceedings of the Ninth IFToMM International Symposium on Theory of Machines and Mechanisms, Bucharest, Romania, 2005, v. I, p. 123-128.

PETRESCU, F. I. T.; PETRESCU, R. V. (2005b) Determining the dynamic efficiency of cams. In: Proceedings of the Ninth IFToMM International Symposium on Theory of Machines and Mechanisms, Bucharest, Romania, 2005, v. I, p. 129-134.

PETRESCU, F. I. T. (2015a) Geometrical Synthesis of the Distribution Mechanisms. Am. J. Eng. Appl. Sci., v. 8, n. 1, p. 63-81. doi:10.3844/ajeassp.2015.63.81

PETRESCU, F. I. T. (2015b) Machine Motion Equations at the Internal Combustion Heat Engines. Am. J. Eng. Appl. Sci., v. 8, n. 1, p. 127-137. doi:10.3844/ajeassp.2015.127.137

PETRESCU, F. I. T. (2012a) Bazele analizei și optimizării sistemelor cu memorie rigidă – curs și aplicații. Create Space publisher, USA, (Romanian edition), 2012. ISBN 978-1-4700-2436-9

PETRESCU, F. I. T. (2012b) Teoria mecanismelor – Curs si aplicatii (editia a doua). Create Space publisher, USA, (Romanian version), 2012. ISBN 978-1-4792-9362-9

SAVA, L. (1970) Contributions to Dynamics and Optimization of Income Mechanism Synthesis. Ph.D. Thesis, I.P.B.; 1970.

TARAZA, D.; HENEIN, N. A.; BRYZIK, W. (2001) The Frequency Analysis of the Crankshaft's Speed Variation: A Reliable Tool for Diesel Engine Diagnosis. J. Eng. Gas Turbines Power, v. 123, n. 2, p. 428-432. doi:10.1115/1.1359479

TESAR, D.; MATTHEW, G. K. (1974) The design of modeled cam systems. In: Cams and cam mechanisms, Ed. J. Rees Jones, MEP, London and Birmingham, Alabama.

WIEDERRICH, J. L.; ROTH, B. (1974) Design of low vibration cam profiles. In: Cams and Cam Mechanisms. Ed. J. Rees Jones, MEP, London and Birmingham, Alabama.

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