Comprehensive optimization of mode of departure of boom system of loader crane

Ловейкін, В. С.; Romasevych, Yu. O.; Spodoba, O.; Ловейкін, А. В.; Шворов, С.

doi:10.31548/machenergy2020.02.005

Cited by 4 publications

(4 citation statements)

References 12 publications

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“…The analysis of the obtained results of the calculation of the optimum according to the criterion of the mean square value of the change in the acceleration of the driving moment of the movement mode of the boom system of the manipulator, which is installed on an elastic base, shows that an increase in the smoothness of the change in the acceleration of the change in the angular coordinate of the boom significantly reduces the oscillatory processes that occur during its movement [7,16,20].…”

Section: Discussion Of the Resultsmentioning

confidence: 99%

Optimal mode movement of the robot manipulator on an elastic base according to the criterion of the mean square value of the acceleration of the drive torque

Loveikin,

Mishchuk

2023

GBDMM

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Previous studies of the optimization of the manipulator motion mode on an elastic base based on the criteria of the rms value of the drive torque and the rate of change of the rms value of the drive torque established that the use of optimal manipulator motion modes, which are created on the basis of higher derivatives of the characteristics of the change of the drive torque, allow to obtain more smooth movements of the boom system of the manipulator, thereby reducing its oscillations on the elastic support. At the same time, the obtained optimal modes of movement didn't completely eliminate the boom system oscillations during the change of departure. By observing the oscillations of the elastic link of the manipulator, the quality of the obtained optimal modes of movement was evaluate and the presence of residual oscillations was shown. This work considers the possibility of optimizing the manipulator's motion mode based on the criterion of the mean square value of the acceleration of the drive torque change. For this purpose, the second derivative of the driving torque function of the manipulator boom system drive was determined first. Such a criterion for optimizing the motion mode is an integral functional, the minimization of which is carry out by the methods of variational calculus. The regularity of the change of the driving torque it was find from the dynamic equation of motion. The search for the optimal motion mode of the manipulator realized through the solution of the Poisson boundary nonlinear differential equation of the fourth order. The results of the conducted research made it possible to clarify much better the nature of the vibrations of the manipulator boom system and, as a result, to develop a drive control system that allows the realization of the obtained optimal mode of movement.

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Section: Discussion Of the Resultsmentioning

confidence: 99%

Optimal mode movement of the robot manipulator on an elastic base according to the criterion of the mean square value of the acceleration of the drive torque

Loveikin,

Mishchuk

2023

GBDMM

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“…The determining factors influencing the operation process, which in turn depends on the reliability and efficiency of its functioning as a restored system, are the organization of maintenance and the availability of a sufficient number of spare elements. Models in systems where various methods of carrying out emergency, preventive, planned-preventive, and other types of repairs are described in [1][2][3], where the mathematical apparatus of Markov and semi-Markov processes with a finite set of states is used.…”

Section: Literature Reviewmentioning

confidence: 99%

Optimality criteria for the process of technical operation of locomotives

Kapica,

Bobyr,

Kyslyi

et al. 2024

MATEC Web Conf.

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The efficiency of a locomotive fleet as a complex system depends significantly on the mode and conditions of its operation, which, in many cases, are determined both by its own condition and by the state of the maintenance system. In reality, changes in the state of the system, and its further behaviour in most cases can be described by the Markov process. It should be noted the excessive rigidity of the hypothesis about the Markov character of the behaviour in the process of technical operation of the locomotive fleet that makes the resulting model insufficiently adequate. The article proposes a methodology to assess the efficiency in the functioning of the locomotive fleet as a semi-Markov system. Relationships for calculating the main statistical characteristics of the efficiency indicators in the process of technical operation of locomotives have been obtained. The choice of optimality criteria for the process is justified. A procedure for constructing an ordered sequence of enhancing maintenance and repair strategies, considering the condition of a particular locomotive has been offered. Determining the optimality criteria for the technical operation process of the locomotive fleet based on the research of stochastic estimates in the efficiency of the semi-Markov model. Obtaining a sequence of maintenance and repair strategies. The efficiency of locomotive fleet operation significantly depends on the quality of service. The quality of service is determined by the effectiveness of diagnostic tools for technical conditions. The process of operating a locomotive fleet is described by a semi-Markov model. The semi-Markov model used makes it possible to more fully take into account, in the general case, the diagnostic support of the locomotive and the restoration process. The unit cost function the average unit cost, the average unit loss coefficient the coefficient of average, and operating factor was selected as target functions. A procedure has been proposed for constructing an ordered sequence of improving maintenance and repair strategies, considering the condition of a particular locomotive.

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“…In the study [6][7][8], the results of recent research, development and implementation of applied optimization methods, issues of formalization, classification and evaluation of complexity of computational optimization problems are obtained. It is confirmed that optimization methods can be used to solve a wide range of applied problems that arise in science, technology, biology, economics, production, etc.…”

Section: Analysis Of Publicationsmentioning

confidence: 99%

Optimization of the mode of movement of the boom system of the loader crane

Loveikin,

Romasevich,

Spodoba

et al. 2023

OMTC

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The article presents a method for solving the problem of eliminating vibrations of the load, which is fixed on a rigid articulated suspension at the time of simultaneous movement of two links of the boom system. The essence of the method is to optimize the mode of simultaneous movement of two links of the boom system of the loader crane with horizontal movement of the load during the start-up period. The problem is solved according to two optimization criteria, namely: according to the optimization criterion of the root-mean-square value of the generalized force and the optimization criterion of the root-mean-square value of the power of drive mechanisms. The developed criteria reflect the undesirable properties of the links of the boom system and drive mechanisms, so their value was minimized. The solution of the optimization problem is presented in a discrete form. For this purpose, the particle swarm optimization (ME-PSO) method was used. This helped to obtain discrete values of the kinematic and power characteristics of the boom system of the loader crane. Since the optimization criterion is an integral functional, the methods of the calculus of variations are used for its optimization. The solution of the variational optimization problem is presented in the form of many parametric functions that satisfy the boundary conditions of motion and minimize the obtained dimensionless criteria. For this purpose, the particle swarm optimization (ME-PSO) method was used. This made it possible to obtain the dependence of the optimal energy and power characteristics of the boom system and the drive mechanisms of the loader crane. The mode of movement of the boom system links obtained as a result of optimization improved the power and energy characteristics of the loader crane, which made it possible to increase its reliability and productivity.

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Comprehensive optimization of mode of departure of boom system of loader crane

Cited by 4 publications

References 12 publications

Optimal mode movement of the robot manipulator on an elastic base according to the criterion of the mean square value of the acceleration of the drive torque

Optimal mode movement of the robot manipulator on an elastic base according to the criterion of the mean square value of the acceleration of the drive torque

Optimality criteria for the process of technical operation of locomotives

Optimization of the mode of movement of the boom system of the loader crane

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