scholarly journals The determination of the mechanical friction work in a cam –follower couple of complex cam mechanisms. Part I-theoretical aspects

2020 ◽  
Vol 30 (1) ◽  
pp. 1-7
Author(s):  
Claudia Mari POPA ◽  
◽  
Nicolae PANDREA ◽  
Dinel POPA
Keyword(s):  
Contact Point ◽  
Mechanical Work ◽  
Dynamical Analysis ◽  
Connecting Rod ◽  
Calculation Algorithm ◽  
Numerical Application ◽  
Cam Mechanism ◽  
Parallel Movement ◽  
Cam Follower

In thispaper we arepresenting theoretical aspects regarding the determination ofthe mechanical friction work presentedin a cam-follower couple, in the case where the follower has a plane parallel movement. An articulated quadrilateral mechanism itis cinematically anddynamically studied, where the connecting rod is actioned by a rotation cam. For showing the relative movement of the contact point on the cam and on the follower, a zero-dimension ring is inserted between the cam and the follower. The expression of the mechanical work is obtained after solving the cinematic and dynamical analysis of the complex rotation cam mechanism. The value of the mechanical work is obtained by integration. The conclusions are presented in the end of the paper and it is mentioned that in a future paper, a numerical application will be made for illustrating the calculation algorithm.

scholarly journals The determination of the mechanical friction work in a cam –follower couple of complex cam mechanisms. Part II-numerical application

2020 ◽  
Vol 30 (1) ◽  
pp. 1-7
Author(s):  
Claudia Mari POPA ◽  
◽  
Nicolae PANDREA ◽  
Dinel POPA
Keyword(s):  
Computer Program ◽  
Numerical Application ◽  
Cam Mechanism ◽  
Cam Follower

This paper is a continuation of a previous paper, where we presented the analyticalrelations that lead to obtaining the mechanicalfriction work from the cam-follower couple of a complex cam mechanism. The obtained results are presented as diagrams obtained by a computer program.

Monte Carlo method for the reduction of measurement errors in the material parameter estimation with cavities

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Ronny Peter ◽  
Luca Bifano ◽  
Gerhard Fischerauer
Keyword(s):  
Monte Carlo ◽  
Monte Carlo Method ◽  
Measurement Errors ◽  
Input Data ◽  
Material Parameter ◽  
Cavity Resonator ◽  
Calculation Algorithm ◽  
The Monte Carlo Method ◽  
Electromagnetic Resonances

Abstract The quantitative determination of material parameter distributions in resonant cavities is a relatively new method for the real-time monitoring of chemical processes. For this purpose, electromagnetic resonances of the cavity resonator are used as input data for the reverse calculation (inversion). However, the reverse calculation algorithm is sensitive to disturbances of the input data, which produces measurement errors and tends to diverge, which leads to no measurement result at all. In this work a correction algorithm based on the Monte Carlo method is presented which ensures a convergent behavior of the reverse calculation algorithm.

scholarly journals On the Determination of Meshed Distribution Networks Operational Points after Reinforcement

2019 ◽  
Vol 9 (17) ◽  
pp. 3501 ◽  
Author(s):  
Vasiliki Vita ◽  
Stavros Lazarou ◽  
Christos A. Christodoulou ◽  
George Seritan
Keyword(s):  
Monte Carlo Simulation ◽  
Distributed Generation ◽  
Electric Vehicles ◽  
Maximum Load ◽  
Distribution Networks ◽  
Network Robustness ◽  
Current Load ◽  
Objective Functions ◽  
Calculation Algorithm

This paper proposes a calculation algorithm that creates operational points and evaluates the performance of distribution lines after reinforcement. The operational points of the line are probabilistically determined using Monte Carlo simulation for several objective functions for a given line. It is assumed that minimum voltage at all nodes has to be balanced to the maximum load served under variable distributed generation production, and to the energy produced from the intermittent renewables. The calculated maximum load, which is higher than the current load, is expected to cover the expected needs for electric vehicles charging. Following the proposed operational patterns, it is possible to have always maximum line capacity. This method is able to offer several benefits. It facilitates of network planning and the estimation of network robustness. It can be used as a tool for network planners, operators and large users. It applies to any type of network including radial and meshed.

Dynamic Simulation and Test for the Valve Train Dynamics

2011 ◽  
Vol 117-119 ◽  
pp. 15-19 ◽  
Author(s):  
Cai Yun Guan ◽  
You Ming Chen ◽  
Wen Jie Qin
Keyword(s):  
Dynamic Model ◽  
Contact Stiffness ◽  
Quantitative Agreement ◽  
Measured Data ◽  
Valve Train ◽  
Parameter Determination ◽  
Cam Follower ◽  
Train Dynamics ◽  
Simulation Results

This paper presents the development of a dynamic model of the valve train of one engine. During the parameter determination of the model, finite element method is used to calculate the contact stiffness of the cam-follower . The simulation results of the model are compared with measured data of the valve train at same speed. Excellent quantitative agreement is found between the numerical and experimental results and the validity of the dynamic model can be verified.

Rationalized approach to the determination of contact point in force-distance curves: Application to polymer brushes in salt solutions and in water

2010 ◽  
pp. NA-NA ◽  
Author(s):  
Kathryn A. Melzak ◽  
Susana Moreno-Flores ◽  
Kai Yu ◽  
Jayachandran Kizhakkedathu ◽  
José L. Toca-Herrera
Keyword(s):  
Polymer Brushes ◽  
Contact Point ◽  
Salt Solutions

Dynamic Analysis of the Structure of Automobile Components, Obtained by Powder Metallurgy

2020 ◽  
Vol 896 ◽  
pp. 119-126
Author(s):  
Anca Didu ◽  
Nicolae Dumitru ◽  
Cristina Ileana Pascu ◽  
Violeta Cristina Contoloru
Keyword(s):  
Dynamic Analysis ◽  
Dynamic Models ◽  
Combustion Engine ◽  
Practical Interest ◽  
Wide Field ◽  
Connecting Rod ◽  
Time Frequency ◽  
Different Types ◽  
Automobile Components

The analysis of the dynamic behavior of parts from the structure of the cationing mechanism of an internal combustion engine in 4 steps is followed. Thus, kinetic and dynamic models were developed for the motor mechanism considered as an assembly consisting of crankshaft, connecting rods, bearings and pistons. Dynamic models were built mainly in the Ansys program, based on the finite element method. The following problems were addressed, namely the dynamic analysis, with the determination of the response in time for displacements, stresses and deformations and also the vibration analysis in order to analyze the frequency response for the kinematic parameters of the whole system, but also of the component elements. Dynamic models for the numerical processing of the two types of analyzes were designed in a parameterized system with multiple possibilities of working on different time, frequency or different types of loadings and connection conditions. The purpose of this paper is to study the dynamic response of the main elements of the mechanism, for different types of materials. Given the wide field of applicability in automobiles, the technology for obtaining parts from sintered powders, the studies were realized for the cases when the connecting rod and the bearings are made of metallic powders, respectively of steel, to be extended for more complex cases, when we consider the influence of lubricant and temperature distribution in areas of practical interest.

Based on the Pro/E Straight Moving Disc Cam Modeling and Motion Simulation

2012 ◽  
Vol 452-453 ◽  
pp. 142-146
Author(s):  
Ying Xing Xie
Keyword(s):  
Motion Equation ◽  
Motion Simulation ◽  
Cam Mechanism ◽  
Profile Equation ◽  
Cam Follower

Through the Pro/E software, build straight moving disc cam follower motion equation of the curve, establish the cam modeling, and assemble to make the cam work simulation, revise cam outside contour profile equation, so as to improve the design of cam mechanism.

Analysis of assembly defects in the cam curved groove mechanism

2020 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Weibin Lan ◽  
Shouwen Fan ◽  
Shuai Fan
Keyword(s):  
Dynamic Characteristics ◽  
Contact Point ◽  
Contact Theory ◽  
Analysis Method ◽  
The Finite Element Method ◽  
Interference Fit ◽  
Content Type ◽  
Cam Mechanism ◽  
Contact Points ◽  
General Mathematical Model

Purpose This paper aims to propose an elementary approach toward the identification of assembly defects of a cam curved groove mechanism. Design/methodology/approach A numerical analysis method for identifying the assembly defects of the cam curved groove mechanism is proposed by resorting to Hertz contact theory. A general mathematical model is established to analyze the kinematic and dynamic characteristics with an interference fit between the main roller and cam curved groove, including the contact points of the external and internal ring. Findings The analysis method of the contact point characteristics of the cam curved groove mechanism is given in this paper, and the kinematic and dynamic characteristics of the main roller can be analyzed. The numerical examples presented in this paper are implemented in MATLAB, feasibility and validity of the above algorithm are verified by the finite element method. Originality/value Regarding the defects of the interference fit, the findings of this paper can serve as a reference for researchers in reducing the defects in the design process of the cam mechanism.

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