Modeling the Dynamics of Asphalt–Roller Interaction during Compaction

A method of parametric synthesis of the PID controller of the control system for high-order objects based on the modal method for linear systems with the location of complex-conjugate poles is proposed. The methodology provides for inspection of the controller parameters according to the algebraic criterion of stability of Routh-Hurwitz to change all positive values. On the example of designing a PID controller of the control system for the object of the fourth order, the efficiency of the technique is demonstrated

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“…In both cases, the duration of the transient process р t is determined by the approximate formula [7,17,18, and 19]:…”

Section: Initial Mathematical Formulation Of System and Research Methodologiesmentioning

confidence: 99%

“…Synthesis of controllers for high order objects (above second) is actual. Mathematical models of working processes of road and construction machines as control object are described by differential equation and transfer function of second or higher order [12][13][14][15][16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Design of Controllers for Higher Order Systems

Прокопьев

Nabizhanov

Ivanchura

et al. 2019

2019 International Multi-Conference on Engineering, Computer and Information Sciences (SIBIRCON)

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“…The maximum normal stress of three elements increases with the increase of diameter of connecting rod B 1 C 1 . When the diameter of connecting rod changes in the interval [ 6 , 12 ], maximum stress of element 5 and element 7 fluctuates greatly.…”

Section: Optimal Design Of Flipping Mechanismmentioning

confidence: 99%

“…However, the error form considered is relatively simple and cannot reflect the actual working conditions of the cam mechanism. Imran S A [ 12 ] and Nguyen V [ 13 ] build the dynamic model. A vibration analysis of the study object was carried out, and the structure was optimized.…”

Section: Introductionmentioning

confidence: 99%

Design and optimization of complex mechanism flip shaping subsystem based on genetic algorithm and rigid-flexible coupled dynamic model

Shang

Chen

2023

PLoS ONE

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In this paper, the cam connecting rod system of the high-speed group vertical machine flipping shaping mechanism is the research object. In order to solve the key problem that the flipping shaping mechanism cannot accurately complete the action when the vibration of the mechanism is large. In this paper, the finite element method is used to construct the dynamic model of the connecting rod subsystem of the flipped shaping mechanism. And The dynamic model of cam roller subsystem is established by centralized parameter method. Based on the MATLAB Genetic Algorithm toolbox and using Newmark’s method, the dynamic equations of the flipped plastic mechanism system are solved. The optimal parameters of the connecting rod of the mechanism, the cam profile curve and the swing power and swing torque of the mechanism at different speeds are analyzed. The results show that the speed and convex contour line are important factors affecting the performance of the mechanism. And the pendulum force (swing torque) is the main cause of the vibration of the mechanism on the frame. Therefore, the mechanism pendulum dynamic and the swing moment are selected as the objective functions of the optimization model. By selecting the node parameters of the sixth order spline motion law and the cross-section parameters of the connecting rod as the design variables. The cam linkage system is optimally designed to obtain the optimal value. Finally, the optimal design of the flipped shaping mechanism was analyzed and compared with the original mechanism.

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“…For many, a positivistic perspective and quantitative data were arguably quite appropriate to the topic under examination. For studies that compare methods for compaction of soils (Karatai et al 2017), computer modeling of the performance of asphalt or other materials (Imran et al 2017), or the differentiation of empirical methods of schedule analysis (Ballesteros-Perez 2017), positivism provides a highly appropriate lens for the analyses undertaken. However, less than 20% of the papers focused on these types of studies, primarily in scheduling, estimating, or material-related research.…”

Section: How Are We Doing It?mentioning

confidence: 99%

Unpacking Ontological Perspectives in CEM Research: Everything Is Biased

Sherratt

Leicht

2020

J. Constr. Eng. Manage.

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Methodological debates are nothing new in construction engineering and management (CEM) research. However, when the consequences, and at times even the content, of such debates are considered, what often emerges is both a superficiality and inconsistency in the way research methodologies are understood, mobilized and used to judge the rigor and value of empirical work. CEM research seems reluctant to engage with the nature of reality, the nature of knowledge, or, at times, with any philosophy at all. This paper explores and considers the influence, or lack of influence, that ontological and epistemological positioning has on much of our CEM research, and what that indicates for the findings we generate. With an explicit focus on bias, and the approaches taken within a volume, 173 manuscripts, of the Journal of Construction Engineering and Management are examined. We argue that multimethodological perspectives on a problem should be adopted where possible, able as they are to generate more holistic understandings and more comprehensive illuminations of phenomena in practice, and thereby support the development of a more mature CEM research discipline, both in terms of academic scholarship and relevance to practice.

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Modeling the Dynamics of Asphalt–Roller Interaction during Compaction

Cited by 20 publications

References 12 publications

Design of Controllers for Higher Order Systems

Design of Controllers for Higher Order Systems

Design and optimization of complex mechanism flip shaping subsystem based on genetic algorithm and rigid-flexible coupled dynamic model

Unpacking Ontological Perspectives in CEM Research: Everything Is Biased

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