Adaptive sliding mode control of regenerative chatter and stability improvement in boring manufacturing process with model uncertainties

Moradian, Hossein; Abbasi, Mohammad Hossein; Moradi, Hamed

doi:10.1177/0954406219889994

Cited by 8 publications

(5 citation statements)

References 36 publications

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“…This dynamism and adaptability require defense mechanisms to be constantly updated to cope with ever-changing threats. The dynamic model equation of LFC is shown in Eq (1).…”

Section: Lfc Model Construction Based On Event-triggered Strategymentioning

confidence: 99%

“…The power systems of several regions are connected using interconnection lines to obtain interconnected power systems. This system typically consists of multiple power plants, transmission networks, and distribution networks, used to supply electricity to a wide range of users [ 1 ]. The goal of an interconnected power system is to achieve efficient transmission, exchange, and electricity distribution to satisfy different regions and users [ 2 ].…”

Section: Introductionmentioning

confidence: 99%

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Security load frequency control model of interconnected power system based on deception attack

Sun,

Tang,

2024

PLoS ONE

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The interconnected power system connects the power grids of different regions through transmission lines, achieving power interconnection and resource sharing. However, data is transmitted through open power networks and is more susceptible to network attacks. To improve the stability of interconnected power systems under deception attacks, three scenarios of system security load frequency control were studied. Based on the construction of a dynamic model of load frequency control, an event-triggered strategy was used to reduce the communication frequency between nodes, resulting in a reduction in the amount of network transmission data. A sliding mode controller was constructed to solve the problem of event-triggered sliding mode security load frequency control. Elastic event-triggered sliding mode load frequency control for interconnected power systems under mixed attacks. The simulation results showed that using the load frequency control model triggered by events, the load frequency deviation of the interconnected power system can be stabilized at around 12 seconds, effectively saving the cost of network resources. Under the regulation of the load frequency control model based on sliding mode control, the interconnected power system stabilized in 10 seconds, reducing the load of network transmission. The elastic event-triggered sliding mode load frequency control model can ensure stable transmission of power data under various attacks and has good anti-interference performance. The results of this study have played an important role in achieving the stability of power resource supply. Compared with previous studies on individual power systems, this study solves the attack problem of interconnected power systems and considers the frequency control problem of system security loads under mixed attacks, enabling the system to recover stability faster.

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“…This dynamism and adaptability require defense mechanisms to be constantly updated to cope with ever-changing threats. The dynamic model equation of LFC is shown in Eq (1).…”

Section: Lfc Model Construction Based On Event-triggered Strategymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Security load frequency control model of interconnected power system based on deception attack

Sun,

Tang,

2024

PLoS ONE

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“…An adaptive sliding mode control approach can suppress the chattering phenomenon in the boring process in the presence of model uncertainties and unmodeled dynamics; it acts effectively in improving the process stability. A higher material removal rate can be obtained without stability loss [9].…”

Section: Introductionmentioning

confidence: 99%

The Selection of Cutting Speed to Prevent Deterioration of the Surface in Internal Turning of C45 Steel by Small-Diameter Boring Bars

Vopát,

Kuruc,

Pätoprstý

et al. 2024

Machines

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The turning of small-diameter deep holes is usually critical when the process of machining is unstable and the use of a special boring bar is often necessary. This paper is focused on the influence of cutting speed with a combination of cutting conditions such as feed and tool overhang on chatter marks, surface roughness and roundness of machined holes. In the experiment, two types of tool material for indexable boring bars were used, namely cemented carbide and steel. These are a group of boring bars used for the internal turning of holes of small diameters with indexable cutting inserts. Monolithic carbide boring bars are already used for internal turning of holes of even smaller diameters. Uncoated turning inserts made of cermet were used. The cutting tests were performed on the DMG CTX alpha 500 turning center. In the case of the steel boring bar, decreasing the cutting speed really led to an increase in the quality of the surface roughness and reduced the formation of chatter marks and large chatter marks. The cemented carbide boring bar also followed a similar trend, but it should be noted that the overall effect was not so great. This means that increasing the cutting speed makes the cutting process less stable and, vice versa, lower values of cutting speed reduce the formation of chatter marks and the related deterioration of the surface quality. The occurrence of chatter is directly related to the increase in the surface roughness parameters Ra and Rz of the machined surface. It can be stated that the dependence of roundness deviations on cutting speed values has a similar character to the results of the measured surface roughness values. Therefore, if the cutting speed is increased, it will make the cutting process less stable; this is also indirectly reflected in larger roundness deviations. However, it is necessary to state that this phenomenon can be observed in turning holes with small diameters using the steel boring bar, where the unstable cutting conditions materialized in the form of chatter marks.

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“…The obtained theoretical and experimental results showed that using piezoelectric shunt damping it is possible to significantly increase the stability margin in boring operations during tests limited to small boring bars and rotating parts with undefined spindle speed [ 2 ]. An adaptive sliding mode control approach is presented to suppress the chatter in the boring process in the presence of uncertainties of model and dynamics [ 21 ]. The industrialized version of the boring bar with embedded sensors gives valuable insight into the cutting process during which chatter and excessive insert wear can be detected [ 22 ].…”

Section: Introductionmentioning

confidence: 99%

An Improved Method of Minimizing Tool Vibration during Boring Holes in Large-Size Structures

et al. 2021

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The paper presents a thoroughly modified method of solving the problem of vibration suppression when boring large-diameter holes in large-size workpieces. A new approach of adjusting the rotational speed of a boring tool is proposed which concerns the selection of the spindle speed in accordance with the results of the simulation of the cutting process. This streamlined method focuses on phenomenological aspects and involves the identification of a Finite Element Model (FEM) of a rotating boring tool only and validating it with a real object, while dispensing with discrete modelling of a completely rigid workpiece. In addition, vibrations in the boring process in all directions were observed, which implies a geometric nonlinearity of the process model. During the simulation, the values of the Root Mean Square (RMS) of the time plots and the dominant values of the “peaks” in the displacement amplitude spectra were obtained. The effectiveness of the method was demonstrated using a selected mechatronic design technique called Experiment-Aided Virtual Prototyping (E-AVP). It was successfully verified by measuring the roughness of the indicated zone of the workpiece surface. The economic profitability of implementing the method in the production practice of enterprises dealing with mechanical processing is also demonstrated.

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Adaptive sliding mode control of regenerative chatter and stability improvement in boring manufacturing process with model uncertainties

Cited by 8 publications

References 36 publications

Security load frequency control model of interconnected power system based on deception attack

Security load frequency control model of interconnected power system based on deception attack

The Selection of Cutting Speed to Prevent Deterioration of the Surface in Internal Turning of C45 Steel by Small-Diameter Boring Bars

An Improved Method of Minimizing Tool Vibration during Boring Holes in Large-Size Structures

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