Relevant bibliographies by topics / Cam-and-follower system

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  1. Journal articles
  2. Dissertations / Theses
  3. Conference papers

Academic literature on the topic 'Cam-and-follower system'

Author: Grafiati
Published: 4 June 2021
Last updated: 15 February 2022

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Journal articles on the topic "Cam-and-follower system"

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Yang, Yong-Feng, Yu Lu, Ting-Dong Jiang, and Na Lu. "Modeling and Nonlinear Response of the Cam-Follower Oblique-Impact System." Discrete Dynamics in Nature and Society 2016 (2016): 1–8. http://dx.doi.org/10.1155/2016/6142501.

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In order to quickly and accurately analyze the complex behavior of cam-follower oblique-impact system, a mathematical model which can describe separation, impact, and contact was established in this paper. The transient impact hypothesis was extended, and the oblique collision model was established by considering the tangential slip. Moreau time-stepping method was employed to solve the linear complementarity problem which transformed by the oblique-impact equations. The simulation results show that the cam and follower kept permanent contact when the cam rotational speed was low. With the increase of the cam rotational speed, the cam and follower would be separated and then impact under the gravity action. The system performance shows very complex nonlinear characteristics.
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Ouyang, Tiancheng, Pan Wang, and Haozhong Huang. "Cam profile optimization for the delivery system of an offset press." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 231, no. 23 (2016): 4287–97. http://dx.doi.org/10.1177/0954406216665135.

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In this paper, a relatively new strategy known as unified optimization is applied to the cam profile optimization for the delivery system of an offset press by integrating the procedure of single objective optimization with ADAMS software. The proposed approach mainly consists of two parts that includes a single objective optimization procedure and a multibody dynamic model of cam–follower mechanism. For the procedure of single objective optimization, the design process starts from defining the follower acceleration profile by using a modified trapezoidal curve, then genetic algorithm is adopted to determine the evaluating indexes for the kinematic behavior of cam–follower mechanism in multiobjective optimization. Subsequently, sequential quadratic programming, which deals well with equality and inequality constrains, is selected as single objective optimized algorithm in this part. On the other hand, the dynamic simulation developed by ADAMS software is carried out to investigate the dynamic characteristics of cam–follower mechanism. Finally, an optimization cycle, also known as iterative process, is proposed to implement the procedure of single objective optimization and dynamic simulation alternately to improve the kinematic and dynamic characteristics of cam–follower mechanism fully. The cam profile optimization method presented in this paper provides a new tool for cam designers to avoid the undesirable impact and follower jump.
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Lin, Jing. "Calculation of Follower Displacement Error for a Translating Roller-Follower Plate Cam." Advanced Materials Research 706-708 (June 2013): 1769–73. http://dx.doi.org/10.4028/www.scientific.net/amr.706-708.1769.

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The relationship between the installment and machining errors and the follower displacement error for a translating roller follower plate cam was studied. The formulae of the follower displacement error were derived. These expressions can be used to calculate the follower displacement error. The follower displacement error of a translating roller follower cam system is closely related to the cam geometric error and offset distance error. By taking the values and signs of the cam geometric error and offset distance error properly, we can minimize the roller follower displacement error and design the high precision translating roller follower plate cam
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Chavan, U., and S. Joshi. "Synthesis of cam profile using classical splines and the effect of knot locations on the acceleration, jump, and interface force of cam follower system." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 225, no. 12 (2011): 3019–30. http://dx.doi.org/10.1177/0954406211405926.

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Large positive acceleration against a load creates cam follower interface force that can cause excessive wear. Negative acceleration tends to reduce the cam follower interface force, and if the negative acceleration is sufficiently large, jump between the cam and follower can occur. Hence, these are the two main concerns of cam designers. This study presents a new approach to adjust the acceleration, interface force, and jump in the early phase of cam design. Knot locations of polynomial pieces of spline curves are considered as design variables which gives variety of cam profiles. Here, design process starts from displacement profile and there is no need for predefined acceleration curves. A single dwell cam displacement function is defined by classical spline curve, made up of four polynomial pieces that are tied together at their ends, called knots. Specifications of these knots are considered for synthesis and analysis of cam follower system. Mathematical relation between interface force and knot locations is presented as wear and jump models. These models are useful to reduce wear and jump by proper placement of the knots on the basis of interface force. By dynamic simulation of cam follower system, cam curves are drawn for different cases of knot locations and good resemblance was found with theoretical curves. This study suggests the cam designers have the added option to control the kinematic and dynamic quantities without changing the physical parameters of cam follower system.
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Srinivasan, L. N., and Q. Jeffrey Ge. "Designing Dynamically Compensated and Robust Cam Profiles With Bernstein-Be´zier Harmonic Curves." Journal of Mechanical Design 120, no. 1 (1998): 40–45. http://dx.doi.org/10.1115/1.2826674.

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This paper deals with the problem of designing dynamically compensated cam profiles to minimize residual vibrations in high-speed cam-follower systems. The traditional Polydyne method is modified and extended to achieve significant improvement in residual vibration characteristics. First, cam displacement curves are represented by Bernstein-Be´zier harmonic curves as opposed to polynomial curves. These recently developed harmonic curves are low in harmonic content and therefore the resulting cam profiles are less prone to induce resonant vibrations in the follower system. Second, the design procedure is expanded such that the residual vibrations of the resulting cam-follower system is not only extinguished at the design speed but also made insensitive to speed variations. Numerical examples are given in the end.
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Dresner, T. L., and P. Barkan. "New Methods for the Dynamic Analysis of Flexible Single-Input and Multi-Input Cam-Follower Systems." Journal of Mechanical Design 117, no. 1 (1995): 150–55. http://dx.doi.org/10.1115/1.2826100.

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The need to limit system vibrations makes the dynamic behavior of flexible highspeed cam-follower systems (as well as other machines subject to periodic motion) an important topic in the design of any such system. Researchers have worked extensively on this subject since before the turn of the century, both to determine dynamic behavior, and to improve and control that behavior. The goals in these analyses are to: 1) predict when and if the follower jumps off the cam; 2) determine the cam contact forces; 3) determine the linkage forces; 4) establish the closing spring requirements; 5) determine the magnitude of any follower impact with its seat; and 6) help optimize the system’s dynamic response. This paper provides the following: a brief review of the literature on the dynamic analysis of flexible cam-follower systems; a recommended method for the analysis of such systems; and an extension of this analysis method to multi-input systems.
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Lu, N., X. M. Ren, T. D. Jiang, and Y. F. Yang. "Impulsive Control of a Cam-Follower Oblique-Impact System." Journal of Mechanics 34, no. 4 (2017): 475–82. http://dx.doi.org/10.1017/jmech.2017.38.

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AbstractThe transient impact hypothesis was extended, and the oblique collision model was established by considering the tangential slip. In order to solve this problem, the oblique-impact equations for cam-follower were transformed into a linear complementarity problem. Impulsive control method was employed to control or anti-control the nonlinear responses. The simulation results show that the cam-follower system performs very complex nonlinear characteristics, such as period, quasi-period and chaos responses. Using the impulsive control method, the nonlinear responses of the cam-follower system can be controlled to P(n, n) and P(∞, n) or anti-controlled to chaos.
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Hanachi, Shervin, and Ferdinand Freudenstein. "The Development of a Predictive Model for the Optimization of High-Speed Cam-Follower Systems with Coulomb Damping Internal Friction and Elastic and Fluidic Elements." Journal of Mechanisms, Transmissions, and Automation in Design 108, no. 4 (1986): 506–15. http://dx.doi.org/10.1115/1.3258762.

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A highly accurate and predictive dynamic model of a high-speed cam-follower system has been developed and verified. In view of the predominance of Coulomb damping in high-speed cam-follower systems, this form of damping has been used as the chief mode of energy dissipation. This has resulted in a significant improvement in the predictive capability of the dynamic model. The accuracy of the model can also be attributed to careful modeling of system components such as the distributed-parameter modeling of the valve spring, the modeling of the hydraulic lifter, and modeling of the damping due to a nested-valve spring. The latter two represent the first such modeling in the area of cam-follower systems.
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Bagepalli, B. S., T. L. Haskins, and I. Imam. "Generalized Modeling of Dynamic Cam-follower Pairs in Mechanisms." Journal of Mechanical Design 113, no. 2 (1991): 102–9. http://dx.doi.org/10.1115/1.2912758.

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This paper deals with the application of homogeneous (4 × 4) transformations to the generalizing modeling of cam-follower pairs. The procedure adopted is generic, in that it suggests a method of incorporating the modeling of cam-follower pairs in a general purpose program, such as MAP (Mechanism Analysis Program, © General Electric Co.) capable of solving the dynamics of multibody systems, in which any of the bodies could be cams, or followers. This development covers both 2D and 3D cam-follower pairs: XY cams, rotary cams, and drum cams. The cams could be dynamic—with single, or two surfaces (or tracked), with the possibility of impacts between the follower and these surfaces, or, kinematic, with the follower being guided exactly in a slot. This generalized procedure allows one to model several cam-follower pairs in a multibody dynamic system. This is useful in studying, for instance, the dynamic effects that tend to bounce a follower off of a cam surface, the contact force generated, etc. The procedure, also, just as easily, allows for the easy studying of the effects of varying the cam surface profile. Several examples have been tried, and some correlations have been obtained with experimental observations.
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Chan, Chingyao, and Albert P. Pisano. "Dynamic Model of a Fluctuating Rocker-Arm Ratio Cam System." Journal of Mechanisms, Transmissions, and Automation in Design 109, no. 3 (1987): 356–65. http://dx.doi.org/10.1115/1.3258803.

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This study is focused upon one example from a class of cam systems with a fluctuating rocker-arm ratio, known as “finger follower” cam systems. This class of cam systems is typically built in practice with a hydraulic tappet as the pivot-end support for the finger-follower, and the rocker-arm ratio varies as much as 34 percent from the baseline value during the cam cycle. A six-degree-of-freedom dynamic model is formulated to predict the forces as well as the motions of the cam system components. Successful dynamic modeling of such a system requires an accurate model for the hydraulic tappet as well as for the cam system, and so, six separate dynamic phenomena are identified in the tappet and the resulting nonlinear dynamics included in the cam system model. Lateral and rotational motions, as well as the customary longitudinal displacement, are admitted for the valve, and it is found that although the extra degrees of freedom change the cam contact force but little, they strongly influence where in the cam system toss and impact occur.
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Dissertations / Theses on the topic "Cam-and-follower system"

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Paradorn, Vasin. "An Impact Model for the Industrial Cam-follower System: Simulation and Experiment." Digital WPI, 2007. https://digitalcommons.wpi.edu/etd-theses/1096.

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"Automatic assembly machines have many cam-driven linkages that provide motion to tooling. Newer machines are typically designed to operate at higher speeds and may need to handle products with small and delicate features that must be assembled precisely every time. In order to design a good tooling mechanism linkage, the dynamic behavior of the components must be considered; this includes both the gross kinematic motion and self-induced vibration motion. Current simulations of cam-follower system dynamics correlate poorly to the actual dynamic behavior because they ignore two events common in these machines: impact and over-travel. A new dynamic model was developed with these events. From this model, an insight into proper design of systems with deliberate impact was developed through computer modeling. To attain more precise representations of these automatic assembly machines, a simplified industrial cam-follower system model was constructed in SolidWorks CAD software. A two-mass, single-degree-of-freedom dynamic model was created in Simulink, a dynamic modeling tool, and validated by comparing to the model results from the cam design program, DYNACAM. After the model was validated, a controlled impact and over-travel mechanism was designed, manufactured, and assembled to a simplified industrial cam-follower system, the Cam Dynamic Test Machine (CDTM). Then, a new three-mass, two-degree-of-freedom dynamic model was created. Once the model was simulated, it was found that the magnitude and the frequency of the vibration, in acceleration comparison, of the dynamic model matched with the experimental results fairly well. The two maximum underestimation errors, which occurred where the two bodies collided, were found to be 119 m/s2 or 45% and 41 m/s2 or 30%. With the exception of these two impacts, the simulated results predicted the output with reasonable accuracy. At the same time, the maximum simulated impact force overestimated the maximum experimental impact force by 2 lbf or 1.3%. By using this three-mass, two-DOF impact model, machine design engineers will be able to simulate and predict the behavior of the assembly machines prior to manufacturing. If the results found through the model are determined to be unsatisfactory, modifications to the design can be made and the simulation rerun until an acceptable design is obtained."
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Girardin, Benoit. "Contact stress analysis and fatigue life prediction for a cam-roller follower system." Thesis, This resource online, 1994. http://scholar.lib.vt.edu/theses/available/etd-09052009-041041/.

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Yamartino, David E. "Modeling, analysis and redesign of cam-follower systems to increase operating speed." Worcester, Mass.: Worcester Polytechnic Institute, 2004. http://www.wpi.edu/Pubs/ETD/Available/etd-0422104-161532/.

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Dawson, Christopher. "Integrated approach to the geometric generation of worm and wheel, and cam and follower systems." Thesis, Brunel University, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.415034.

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Wang, G.-L. "The running-in wear of automotive cam and follower systems used for lubricant testing and development." Thesis, Swansea University, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.639339.

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The main concern of this thesis was to investigate the running-in wear of automotive cam-follower systems used in the testing of lubricants and to develop wear particle analysis methods using image processing with particular reference to shape determination. Two kinds of cam-follower test rig were used to investigate the behaviour. The initial tests were carried out using a motored Peugeot TU3 cylinder head. The change in surface topography occurring through wear was examined as a basis for establishing an objective method of wear evaluation. The second series of tests was performed using a specially instrumented MIRA cam and tappet test machine. The effects of variations in the initial surface finish and hardness of the cams and followers were evaluated in which the effect of hardness difference between cam and follower and the implications of surface finish variation were highlighted. When compared with previous work, the measurement of the worn surface profiles of followers were similar to those predicted by a specific wear model for the situation where the cam was harder than the follower. Quantitative methods to analyse wear particle shape using image processing were developed. Appropriate image analysis hardware and associated computer software facilities were established to process data and provide quantitative information about particle size and shape, particularly edge detail. Wear particles taken from different sources were analysed. In the MIRA tests, when the cam was harder than the follower, particles generated under two body abrasion conditions exhibited a large aspect ratio and positive skewness, coupled to high kurtosis. This situation was contrasted by the smaller, rounder, rougher edged particles generated in the case where the cam was softer than the follower which exhibited a milder abrasive polishing type wear.
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Sundar, Sriram. "Impact damping and friction in non-linear mechanical systems with combined rolling-sliding contact." The Ohio State University, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=osu1386245045.

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Wei, Eing-Jer, and 魏英哲. "The Design and Manufacture of the Spherical Cam-Oscillating Roller-Follower System." Thesis, 1999. http://ndltd.ncl.edu.tw/handle/41728020966853478652.

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博士<br>國立成功大學<br>機械工程學系<br>88<br>The Spherical Cam-Oscillating Roller-Follower (SCORF) system is a key component widely used in many automated industrial machine systems to convert a continuous rotational motion into a precise intermittent motion. When the component is used in a production system, it performs specific machining operations during intermittent motion period. The indexing mechanism of the SCORF possesses many distinct advantages such as structural simplicity, arbitrary cross transfer angles between input and output axes, high rotation speed, and good indexing accuracy. Since the mechanism was found of high values and great potential in the application to many light industrial automatic equipment, several SCORF-related research programs were conducted in the past in various countries such as United States, Canada and Mexico. By now, some progresses in the development of meshing theory have been made. However, a systematic study on the characterization of transmission errors and the enhancement of system accuracy is still lacking. In view of the aforementioned research needs, this study is geared toward the development of criteria for the production of high precision SCORF systems. A systematic method is presented to study (1) transmission characteristics and error sources including the pattern of linear line contact, curvature interference avoidance, and the relative sliding errors of a cam and a roller; (2) the conditions for dynamic oil film formation and its relation to manufacturability of the SCORF system; (3) kinematic and dynamic error accumulation and flow interaction in a SCORF system; and (4) four basic design criteria that the meshing theory can be used for the design and production of high precision SCORF systems. A basic design method for controlling the error components to reach a given tolerance is also presented.
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Phetkong-Steele, Nonglak. "Learning control and repetitive control of a high-speed, non-linear cam follower system /." Diss., 2002. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:3048969.

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Cheng, Wen-Teng, and 鄭文騰. "Kinematic Synthesis and Analysis of Cam-Follower Systems." Thesis, 1996. http://ndltd.ncl.edu.tw/handle/46240602276214427191.

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Conference papers on the topic "Cam-and-follower system"

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Chang, J. R., and M. C. Huang. "Axial-Transverse Coupled Vibration Analysis of a Swinging Roller-Follower CAM Due to Flexible Follower Rod." In ASME Turbo Expo 2008: Power for Land, Sea, and Air. ASMEDC, 2008. http://dx.doi.org/10.1115/gt2008-51082.

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In this paper, the equations of motion of a swinging roller-follower cam for rise-dwell-fall-dwell (RDFD) case are derived by applying Hamilton’s principle and the assumed mode method. The cycloidal displacement (sinusoidal acceleration) motion is used to describe the rise and the fall motions of the follower. The corresponding cam profile is determined using theory of envelopes. The follower rod is considered to be flexible and modeled as a Rayleigh beam including axial and transverse deflections. The roller rolls in the cam groove. The contact point between the cam and the roller is an unknown point though it is restrained in the cam groove. The contact point position depends not only on the rigid-body motions of the cam system but also the flexible vibrations of the follower rod. Two geometric constraints are formulated to restrict the roller motion and added to the Hamilton’s principle with Lagrange multipliers. The numerical integration method is applied to solve the non-linear differential-algebraic equations to obtain the vibration responses of the cam system. The numerical results for the studied cases show that the follower vibrates significantly especially for the case of high rotation speed of cam. The follower still vibrates during the dwell interval. The parameter effects including the cam rotation speed, the follower length and cross-sectional radius, and the total rise on the vibration behavior have been investigated.
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Larson, Jonathan E., and Harry H. Cheng. "Web-Based Interactive Cam Design." In ASME 1998 Design Engineering Technical Conferences. American Society of Mechanical Engineers, 1998. http://dx.doi.org/10.1115/detc98/mech-5825.

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Abstract We have developed a Web-based interactive cam design package under the programming paradigm of the CH language environment. This package was initially developed as a teaching and learning tool for educational use in an undergraduate Computer-Aided Mechanism Design course. Because the system is Web-based and implemented through a client/server model with the user interface through the Web browser, it is easy to use and maintain. The system can also be used to solve practical engineering cam design problems with two follower motion types of translation and oscillation. The system can be used to generate cam profile, position, velocity, and acceleration histories of the follower. Once a cam/follower system is designed, animation of the cam/follower system can be performed. At the end of the design, the CNC code for manufacturing the designed cam can also be produced through our Web-based cam design system. The package consists of a number of modules including various Web pages, common gateway interface (CGI) programs, and a CH program called cam which performs the necessary computation for cam design. Two different versions of the cam design package have been designed and implemented. One runs the cam design program on the client machine as a CH applet, and the other runs the cam design program on the Web server though CGI. In this paper, details of design and implementation of Web-based cam design package will be described. Two application examples with different motion types for the follower will be used to illustrate features of the applet-based and CGI-based implementation schemes.
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Yousuf, Louay S., and Dan B. Marghitu. "Non-Linear Dynamic Analysis of a Cam With Flat-Faced Follower Linkage Mechanism." In ASME 2017 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/imece2017-71399.

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A mechanism with a cam and a flat-faced follower is considered for distinct angular velocities. The dynamic analysis presents follower linkage displacement driven by a cam rotating at a uniform angular velocity. The system has clearances between the flat-faced follower and the guides and the effect of clearance is analyzed. The cam-follower linkage mechanism is simulated using Solidworks program taking into account the impact and the friction between the cam, flat-faced follower, and the guides. The non-linear analysis tools are employed for the movement of the flat-faced follower. An experimental set up is established to capture the motion of the follower. High-resolution optical marker is mounted on the follower stem to capture the follower motion in the y-direction. The simulation and experimental results are compared and verified for largest Lyapunov exponent.
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Ault, Holly K., and James C. Wilkinson. "Spline Based Design of Cam Contours for Improved Dynamic Performance." In ASME 1993 International Computers in Engineering Conference and Exposition. American Society of Mechanical Engineers, 1993. http://dx.doi.org/10.1115/cie1993-0031.

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Abstract A method for the integrated design and manufacture of radial plate cams is discussed. Currently, a cam-follower system is designed by specifying constraints on the motion of the follower. The physical cam contour or cam pitch curve are not mathematically defined. The cam is manufactured from the discretized follower motion program. A new method for cam design is proposed which will produce a smooth, mathematically defined cam pitch curve while maintaining the proper constraints on the follower motion. Piecewise polynomial functions in the form of rational and/or non-rational splines may be used. Cams will be manufactured using smoothed profiles and tested for improved dynamic performance. The results of initial investigations of cam profile design for this research are presented.
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Srinivasan, Lakshmi N., and Q. Jeffrey Ge. "Designing Dynamically Compensated and Robust Cam Profiles With Bernstein-Bézier Harmonic Curves." In ASME 1997 Design Engineering Technical Conferences. American Society of Mechanical Engineers, 1997. http://dx.doi.org/10.1115/detc97/dac-3960.

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Abstract This paper deals with the problem of designing dynamically compensated cam profiles to minimize residual vibrations in high-speed cam-follower systems. The traditional Polydyne method is modified and extended to achieve significant improvement in residual vibration characteristics. First, cam displacement curves are represented by Bernstein-Bézier harmonic curves as opposed to polynomial curves. These recently developed harmonic curves are low in harmonic content and therefore the resulting cam profiles are less prone to induce resonant vibrations in the follower system. Second, the design procedure is expanded such that the residual vibrations of the resulting cam-follower system is not only extinguished at the design speed but also made insensitive to speed variations. Numerical examples are given in the end.
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Yousuf, Louay S., and Yaakob K. H. Dabool. "Insight Into the Non Periodic Motion of the Knife Follower With a Polydyne Cam Mechanism." In ASME 2020 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/detc2020-22018.

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Abstract A polydyne cam and knife follower system are studied. The effect of cam angular velocity and follower guides internal dimensions on Lyapunov parameter is considered. Wolf algorithm is used to quantify largest Lyapunov exponent parameter. The impact between the cam, follower and the two guides is occurred due to the impulse and momentum phenomenon. Positive value of Lyapunov exponent parameter indicates to non-periodic motion and chaos for the follower. Non-periodic motion is examined using power spectrum analysis of Fast Fourier Transform (FFT) and phase plane diagram. The numerical simulation has been done using SolidWorks software. Follower movement is processed experimentally through an infrared 3-D camera device with a high precision optical sensor. A polydyne cam and knife follower system are studied. The effect of cam angular velocity and follower guides internal dimensions on Lyapunov parameter is considered. Wolf algorithm is used to quantify largest Lya-punov exponent parameter. The impact between the cam, follower and the two guides is occurred due to the impulse and momentum phenomenon. Positive value of Lyapunov exponent parameter indicates to non-periodic motion and chaos for the follower. Non-periodic motion is examined using power spectrum analysis of Fast Fourier Transform (FFT) and phase plane diagram. The numerical simulation has been done using Solid-Works software. Follower movement is processed experimentally through an infrared 3-D camera device with a high precision optical sensor. The simulation and experimental results are compared and verified for non-periodic motion of the follower. The follower motion is non-periodic when the orbit of phase-plane diagram diverges with no limit of spiral cycles.
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Mahyuddin, Andi I., and Ashok Midha. "Steady-State Rigid-Body Dynamic Response of Cam-Follower Mechanisms." In ASME 1994 Design Technical Conferences collocated with the ASME 1994 International Computers in Engineering Conference and Exhibition and the ASME 1994 8th Annual Database Symposium. American Society of Mechanical Engineers, 1994. http://dx.doi.org/10.1115/detc1994-0255.

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Abstract The camshaft of a cam-follower mechanism experiences a position-dependent moment due to the force exerted on the cam by the follower, causing the angular speed of the camshaft to fluctuate. In this work, a method to expediently predict the camshaft speed fluctuation is developed. The governing equation of motion is derived assuming that the cam-follower system is an ideal one wherein all members are treated as rigid. An existing closed-form numerical algorithm is used to obtain the steady-state rigid-body dynamic response of a machine system. The solution considers a velocity-dependent moment; specifically, a resisting moment is modeled as a velocity-squared damping. The effects of flywheel size and resisting moment on camshaft speed fluctuation are studied. The results compare favorably with those obtained from transient response using a direct integration scheme. The analytical result also shows excellent agreement with the camshaft speed variation of an experimental cam-follower mechanism. The steady-state rigid-body dynamic response obtained herein also serves as a first approximation to the input camshaft speed variation in the dynamic analysis of flexible cam-follower mechanisms in a subsequent research.
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Tsay, Der-Min, Kuo-Shu Tseng, and Hsin-Pao Chen. "Development of a Measuring System for Planar Cam Profiles and Their Follower Motions." In ASME 2004 International Mechanical Engineering Congress and Exposition. ASMEDC, 2004. http://dx.doi.org/10.1115/imece2004-59526.

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A measuring system that can be used to inspect planar cam contours and to evaluate their follower displacement, velocity, and acceleration curves with a higher degree of accuracy without the aid of approximating follower displacements in traditional methods is constructed. Based on the geometric relationships at the contact point between a planar cam profile and its follower, analytical descriptions that can be utilized to determine the follower displacement curve and its derivatives are first identified. To verify the feasibility and accuracy of the algorithms proposed for the measuring system, analytical results generated from a theoretical design are compared to those obtained by the application of the computing procedure. To demonstrate the effectiveness and usefulness of the developed procedure, a measuring test bed has been constructed for a practical application example. Furthermore, the results obtained by using the built measuring system are also compared to those obtained by using a coordinate measuring machine (CMM) with the proposed algorithms.
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Yousuf, Louay S., and Dan B. Marghitu. "Lyapunov Exponent for a Globoidal Cam With a Roller Follower Mechanism Using Wolf Algorithm." In ASME 2020 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/imece2020-23606.

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Abstract A globoidal cam and roller follower system is analyzed and discussed for non-periodic motion of the follower. Wolf algorithm is used to calculate the largest Lyapunov exponent. The impact between the cam, follower and the two guides is occurred due to the impulse and momentum phenomenon. The effect of the internal dimension of the follower guide on the non-periodic motion of the follower is considered at distinct angular velocity of the cam. The numerical simulation has been done using SolidWorks software. Follower movement is processed experimentally through an infrared 3-D camera device. Phase plane diagram is used to explain the variation in follower motion. Phase-plane diagram and Fast Fourier Transform (FFT) are used to investigate follower non-periodicity. The follower motion is non-periodic when the orbit of phase-plane diagram diverges with no limit of spiral cycles.
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Shakoor, Mwafak M., Muhammad Ali, Abir Qamhiyah, and Don R. Flugrad. "CAM Size Optimization Based on a Fatigue Life Model." In ASME 2006 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2006. http://dx.doi.org/10.1115/detc2006-99598.

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Abstract:
The cam fatigue life of the translating roller-follower system is studied for polynomial and cycloidal displacement functions. The stress distribution in the contact zone between the cam and the roller-follower is determined by using a computer program. The “volume under risk” where the stress field is higher than the endurance limit is determined. Ioannides-Harris (IH) theory is used on the ‘volume under risk’ and the expected fatigue life is calculated. The effects of cam base circle radius, follower offset, follower total lift and cam angular velocity on the fatigue life are studied. The primary design parameter governing the cam fatigue life is found to be the base circle radius. The fatigue life curve shows an improvement in the life up to a critical base circle radius value. Any further increase in the base circle radius appears as a decrease in the fatigue life.
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