Analysis of Methods for Estimation of Machine Workpiece Roundness

Захаров, О. В.; Bobrovskij, Igor; Kochetkov, A. V.

doi:10.1016/j.proeng.2016.07.071

Cited by 22 publications

(5 citation statements)

References 9 publications

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“…These methods are discussed in the literature, and a comparison between them can be found in previous works. 21,22 The difference in the accuracy between those four methods is small, so any of them could be used for a deformed liner. This article will use the least-squares circle method to evaluate the roundness.…”

Section: Roundness Of Deformed Linersmentioning

confidence: 99%

Increasing the roundness of deformed cylinder liner in internal combustion engines by using a non-circular liner profile

Alshwawra

Pasligh

Hansen

et al. 2019

International Journal of Engine Research

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Increasing the efficiency of internal combustion engines is of major interest for reduced greenhouse gas emission. A significant improvement potential is given with the reduction of friction losses. Here, especially the friction between the piston ring and the cylinder liner is of interest. This article describes a study with the target to enhance the piston ring–cylinder liner conformation through increasing the roundness of the deformed liner during the warm operation state. The approach is based on the assumption that a non-circular liner in the cold state can deform due to thermal and mechanical stresses toward a circular shape under typical hot operation conditions. To test this hypothesis, a computational model for a gasoline engine was built and simulated using advanced finite element methods. The simulation describes the deformation process of the liner from the thermal and mechanical stresses. First, the deformation of a circular liner is simulated, showing asymmetric deformations of up to 30 µm in the warm state for the cylinder positioned at the end of the four-cylinder bank. As experimental data are readily available, a comparison was possible, showing good agreement. Then, three liner configurations with non-circular shape in the cold stage are investigated. For an elliptically shaped configuration, a nearly circular-shaped liner is reached under typical operation conditions. This numerical approach shows the potential for reduced friction of the piston–liner arrangement within internal combustion engines. The planned next step is the extension of this method to three-dimensional shape aspects and the application to the geometry of our test engine of our lab where friction can be measured in detail with a floating-liner measurement system.

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Section: Roundness Of Deformed Linersmentioning

confidence: 99%

Increasing the roundness of deformed cylinder liner in internal combustion engines by using a non-circular liner profile

Alshwawra

Pasligh

Hansen

et al. 2019

International Journal of Engine Research

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“…Data acquisition unit obtains the analog data of sensor produces by the first analog input channel [7]. A/D conversion unit is used to transform analog data to digital data.…”

Section: Design Of the System Softwarementioning

confidence: 99%

Development of the Control System in Bearing Roundness Measuring Instrument Based on CPAC

Liu¹,

Wu²,

Xie³

et al. 2017

Proceedings of the 2017 7th International Conference on Education, Management, Computer and Society (EMCS 2017)

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Abstract. According to the application of bearing roundness measuring instrument in the field of bearing production, and developing a control system of the bearing roundness measuring instrument based on CPAC. The system adopted that CPAC as hardware platform combined with Otostudio as software platform to modular design. Then the system took international programming IEC61131-3 as standard to complete data collection, data processing, data conversion. Finally the result was displayed in friendly human-computer panel. After the experiment, the result shows that the system can measure effectively the bearing roundness error. Moreover, compared with similar products, the system has more detection efficiency and lower cost.

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“…A genetic algorithm improved the computational efficiency of the MZR evaluation [15]. Zakharov et al [16] analyzed the four common evaluation methods used for estimating roundness. Dhanish [17] developed a simple algorithm for the minimum value of circularity error.…”

Section: Introductionmentioning

confidence: 99%

Improved evaluation of minimum zone roundness using an optimal solution guidance algorithm

Huang¹,

Yang²,

Ge³

et al. 2021

Meas. Sci. Technol.

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This study proposes a high speed and accurate evaluation method for minimum zone roundness (MZR) using an optimal solution guidance algorithm (OSGA). The least-square center and roundness determine an original search zone, then the initial candidate points are configured as the centers of a minimum zone circle (MZC). To enhance the global search ability, subsequent candidate points follow the current optimal candidate points. The best three current candidate points jointly generate the new candidate points for the next iteration. In addition, a dynamic search zone updating strategy is proposed to achieve fast convergence of the optimal solution. The width of the search zone varies with the number of iterations required to achieve this rapid convergence. The effectiveness and performance of the proposed method are validated using datasets from previous studies. The proposed OSGA achieves excellent convergence performance, and reaches the global optimal solutions more quickly than previous methods. Across four different datasets, the termination condition is satisfied in only 0.0031-0.0058 s, the optimal solutions are obtained within 5-15 iterations, and the standard deviation of the MZR is less than 5.8276 × 10 −6 mm. The proposed method is also expected to extend to rapid and high-precision evaluation of cylindricity or straightness.

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Analysis of Methods for Estimation of Machine Workpiece Roundness

Cited by 22 publications

References 9 publications

Increasing the roundness of deformed cylinder liner in internal combustion engines by using a non-circular liner profile

Increasing the roundness of deformed cylinder liner in internal combustion engines by using a non-circular liner profile

Development of the Control System in Bearing Roundness Measuring Instrument Based on CPAC

Improved evaluation of minimum zone roundness using an optimal solution guidance algorithm

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