International Conference on Intelligent Engineering Systems, Sep 15, 1997
The paper describes an off-line programming system for coordinate measuring machines based on a n... more The paper describes an off-line programming system for coordinate measuring machines based on a novel approach. Input data to the system is the geometric model produced by a CAD system. Using the picture of the part, the user can select the surface elements to be inspected. He or she has to provide the tolerance data as additional information. First the workpiece setup is decided: the position, orientation, and accessibility of the part is determined. Next the system automatically generates an optimal distribution of the measuring points for the surfaces to be inspected and the local probe path. Probe clusters are built together on an interactive way using a set of building blocks. A time optimal sequence of the inspection operations is computed using heuristic algorithms. At this stage all information needed for the CMM program is available and will be combined in a device independent DMIS format, which in turn can be converted into equipment specific programs.
2019 IEEE 23rd International Conference on Intelligent Engineering Systems (INES)
The probes contribution to the 3D measuring uncertainty of coordinate measuring machines is impor... more The probes contribution to the 3D measuring uncertainty of coordinate measuring machines is important. Besides uncertainty the sensing force is an important factor. From these two points of view one can conclude that the resolution and accuracy of measuring elements built into the probe and the suspension of the probe tip determine the quality of the probe. The geometric accuracy of the probe parts can’t be neglected. The paper discusses a number of probe designs and gives the mathematical relation between the displacement of the probe tip and the sensing force. Simulation results and figures from the literature and our own experiences illustrate the performance of the different constructions.
2015 IEEE 10th Jubilee International Symposium on Applied Computational Intelligence and Informatics, 2015
Algorithms for calculating the minimum zone deviation for various geometric forms like straightne... more Algorithms for calculating the minimum zone deviation for various geometric forms like straightness, flatness, circularity, spherecity and cylindricity have been successfully established by a number. This paper presents simple and robust algorithms based on computational geometric techniques and discusses them from another point of view. The complexity issues are also mentioned.
2016 IEEE 14th International Symposium on Intelligent Systems and Informatics (SISY), 2016
The paper present a novel approach using quaternions to model the error of a coordinate measuring... more The paper present a novel approach using quaternions to model the error of a coordinate measuring machine. The intermediate angular error (pitch, roll and yaw) are calculated using quaternions. The positional error are interpolated using techniques from computer aide geometric design. The intermediate translational and angular errors are combined into homogeneous transformation matrices used for correcting the measurement errors.
2016 IEEE 20th Jubilee International Conference on Intelligent Engineering Systems (INES), 2016
The paper gives an overview of a number of successful research and development projects in the ar... more The paper gives an overview of a number of successful research and development projects in the area of geometric measurement covering different features in the manufacturing industry. The various instruments presented in the subsequent paragraphs are used either by calibration laboratories or quality control departments of manufacturing companies. Each description starts with a short specification, followed by the high lights of the instrument and its design. The discussion of each paragraph is concluded with giving the measurement uncertainty of the instrument.
2009 2nd International Symposium on Logistics and Industrial Informatics, 2009
... Gyula Hermann and József K. Tar Institute of Intelligent Engineering Systems, John von Neuman... more ... Gyula Hermann and József K. Tar Institute of Intelligent Engineering Systems, John von Neumann Faculty of Informatics, Budapest Tech, H-1034 Budapest, Bécsi út 96/B, Hungary e-mail: {hermann.gyula,tar.jozsef}@nik.bmf.hu Krzysztof R. Kozłowski Chair of Control and ...
Software compensation of geometric errors in coordinate measuring is hot subject because it resul... more Software compensation of geometric errors in coordinate measuring is hot subject because it results the decrease of manufacturing costs. The paper gives a summary of the results and achievements of earlier works on the subject. In order to improve these results a method is adapted to capture simultaneously the new coordinate frames in order use exact transformation values at discrete points of the measuring volume. The interpolation techniques used have the draw back that they could not maintain the orthogonality of the rotational part of the transformation matrices. The paper gives a technique based quaternions which avoid this problem and leads to better results.
Page 1. Various Approaches to Measurement Uncertainty: a Comparison Gy.Hermann Óbuda University/D... more Page 1. Various Approaches to Measurement Uncertainty: a Comparison Gy.Hermann Óbuda University/Department of Intelligent Engineering Systems, Budapest, Hungary [email protected] Abstract— The ...
Lecture Notes in Control and Information Sciences, 2009
Over the last 50 years one has been able to observe enormous enhancement in positioning and measu... more Over the last 50 years one has been able to observe enormous enhancement in positioning and measuring accuracy. The main portion of this enhancement is the result of improved knowledge about high precision machine design. A fundamental principle was recognized by Professor Abbe already in the 1890s about the aligment of the displacement measuring system with the distance to be measured. Another fundamental principle is the separation of the structural and measuring functions in a machine. As mechanical accuracy is costly, unlike repeatability, software techniques were used from the beginning to compensate for the systematic errors in order to keep manufacturing costs low.
... It discusses in detail not only the machine and its operation, but elaborates also on the unc... more ... It discusses in detail not only the machine and its operation, but elaborates also on the uncertainty, its [email protected] Abstract. This paper describes the modification of a length measuring machine IJ Rudas et al. ...
2013 IEEE 9th International Conference on Computational Cybernetics (ICCC), 2013
The paper deals in short with the various algorithms useful in determining the pitch distances of... more The paper deals in short with the various algorithms useful in determining the pitch distances of a linear scale. The main advantages and drawbacks from the point of our application are summarized. The environmental and distortional influences are discussed and some computational aspects are given.
ICASSP '82. IEEE International Conference on Acoustics, Speech, and Signal Processing
ABSTRACT Real-time machine monitoring is an open problem in machine tool industry. The presence o... more ABSTRACT Real-time machine monitoring is an open problem in machine tool industry. The presence of unmanned production systems increases the demands on such equipments. Success can be expected only by joint application of signal processing and pattern recognition methods. In real-time applications the speed of the system is of vital importance. In this respect the use of Walsh-Hadamard transform in preprocessing stage of the recognition system is investigated. Fourier and walsh transform of measured vibration data is compared. The paper gives an overview of the applicable methods of classification and feature selection . A multiprocessor-based real-time monitoring system is outlined, which system is under development.
The paper describes a new low cost angle generator intended for the calibration of autocollimator... more The paper describes a new low cost angle generator intended for the calibration of autocollimator. The description of the working principle is followed by the detailed calibration procedure which is based on the comparison principle. The small angles are derived from relatively large displacements. Following the presentation of the operation of the small angle generator, the various error sources are discussed. Finally the paper discusses the calculation of the extended calibration uncertainty in details. I.
In this paper the behavior of a novel, SVD-based adaptive controller is compared with that of the... more In this paper the behavior of a novel, SVD-based adaptive controller is compared with that of the most sophisticated and popular method introduced by Slotine & Li by the use of a three degree of freedom paradigm, the cart + double pendulum system with dynamic friction. The essential difference between the two approaches is that while the Slotine-Li method tries to identify the parameters of the precise analytical model of the robot on the basis of the assumption that the generalized forces are known, the novel one makes do with the temporal observation of the desired vs. realized response of the system and does not assume the lack of unknown perturbations caused e.g. by internal friction. Its another advantge is that it needs the execution of the SVD only on a rough model of the system only one times, before the commencement of the control cycle within which it works with simple computations. The novel method has the deficiency that in principle it can get out of the region of its convergence so its design and use needs preliminary simulation investigations. However, simulation examples exemplify that its convergence can be guaranteed for practical purposes.
2011 6th IEEE International Symposium on Applied Computational Intelligence and Informatics (SACI), 2011
... Gyula Hermann Óbuda University Bécsi út 96/B, H-1034 Budapest, Hungary e-mail: hermann.gyula@... more ... Gyula Hermann Óbuda University Bécsi út 96/B, H-1034 Budapest, Hungary e-mail: [email protected] ... 402-405 (1998) [15] JA Stone, M. Amer, B. Faust, J. Zimmerman Uncertainties in Small-Angle Measurement Systems Used to Calibrate Angle Artifacts ...
International Conference on Intelligent Engineering Systems, Sep 15, 1997
The paper describes an off-line programming system for coordinate measuring machines based on a n... more The paper describes an off-line programming system for coordinate measuring machines based on a novel approach. Input data to the system is the geometric model produced by a CAD system. Using the picture of the part, the user can select the surface elements to be inspected. He or she has to provide the tolerance data as additional information. First the workpiece setup is decided: the position, orientation, and accessibility of the part is determined. Next the system automatically generates an optimal distribution of the measuring points for the surfaces to be inspected and the local probe path. Probe clusters are built together on an interactive way using a set of building blocks. A time optimal sequence of the inspection operations is computed using heuristic algorithms. At this stage all information needed for the CMM program is available and will be combined in a device independent DMIS format, which in turn can be converted into equipment specific programs.
2019 IEEE 23rd International Conference on Intelligent Engineering Systems (INES)
The probes contribution to the 3D measuring uncertainty of coordinate measuring machines is impor... more The probes contribution to the 3D measuring uncertainty of coordinate measuring machines is important. Besides uncertainty the sensing force is an important factor. From these two points of view one can conclude that the resolution and accuracy of measuring elements built into the probe and the suspension of the probe tip determine the quality of the probe. The geometric accuracy of the probe parts can’t be neglected. The paper discusses a number of probe designs and gives the mathematical relation between the displacement of the probe tip and the sensing force. Simulation results and figures from the literature and our own experiences illustrate the performance of the different constructions.
2015 IEEE 10th Jubilee International Symposium on Applied Computational Intelligence and Informatics, 2015
Algorithms for calculating the minimum zone deviation for various geometric forms like straightne... more Algorithms for calculating the minimum zone deviation for various geometric forms like straightness, flatness, circularity, spherecity and cylindricity have been successfully established by a number. This paper presents simple and robust algorithms based on computational geometric techniques and discusses them from another point of view. The complexity issues are also mentioned.
2016 IEEE 14th International Symposium on Intelligent Systems and Informatics (SISY), 2016
The paper present a novel approach using quaternions to model the error of a coordinate measuring... more The paper present a novel approach using quaternions to model the error of a coordinate measuring machine. The intermediate angular error (pitch, roll and yaw) are calculated using quaternions. The positional error are interpolated using techniques from computer aide geometric design. The intermediate translational and angular errors are combined into homogeneous transformation matrices used for correcting the measurement errors.
2016 IEEE 20th Jubilee International Conference on Intelligent Engineering Systems (INES), 2016
The paper gives an overview of a number of successful research and development projects in the ar... more The paper gives an overview of a number of successful research and development projects in the area of geometric measurement covering different features in the manufacturing industry. The various instruments presented in the subsequent paragraphs are used either by calibration laboratories or quality control departments of manufacturing companies. Each description starts with a short specification, followed by the high lights of the instrument and its design. The discussion of each paragraph is concluded with giving the measurement uncertainty of the instrument.
2009 2nd International Symposium on Logistics and Industrial Informatics, 2009
... Gyula Hermann and József K. Tar Institute of Intelligent Engineering Systems, John von Neuman... more ... Gyula Hermann and József K. Tar Institute of Intelligent Engineering Systems, John von Neumann Faculty of Informatics, Budapest Tech, H-1034 Budapest, Bécsi út 96/B, Hungary e-mail: {hermann.gyula,tar.jozsef}@nik.bmf.hu Krzysztof R. Kozłowski Chair of Control and ...
Software compensation of geometric errors in coordinate measuring is hot subject because it resul... more Software compensation of geometric errors in coordinate measuring is hot subject because it results the decrease of manufacturing costs. The paper gives a summary of the results and achievements of earlier works on the subject. In order to improve these results a method is adapted to capture simultaneously the new coordinate frames in order use exact transformation values at discrete points of the measuring volume. The interpolation techniques used have the draw back that they could not maintain the orthogonality of the rotational part of the transformation matrices. The paper gives a technique based quaternions which avoid this problem and leads to better results.
Page 1. Various Approaches to Measurement Uncertainty: a Comparison Gy.Hermann Óbuda University/D... more Page 1. Various Approaches to Measurement Uncertainty: a Comparison Gy.Hermann Óbuda University/Department of Intelligent Engineering Systems, Budapest, Hungary [email protected] Abstract— The ...
Lecture Notes in Control and Information Sciences, 2009
Over the last 50 years one has been able to observe enormous enhancement in positioning and measu... more Over the last 50 years one has been able to observe enormous enhancement in positioning and measuring accuracy. The main portion of this enhancement is the result of improved knowledge about high precision machine design. A fundamental principle was recognized by Professor Abbe already in the 1890s about the aligment of the displacement measuring system with the distance to be measured. Another fundamental principle is the separation of the structural and measuring functions in a machine. As mechanical accuracy is costly, unlike repeatability, software techniques were used from the beginning to compensate for the systematic errors in order to keep manufacturing costs low.
... It discusses in detail not only the machine and its operation, but elaborates also on the unc... more ... It discusses in detail not only the machine and its operation, but elaborates also on the uncertainty, its [email protected] Abstract. This paper describes the modification of a length measuring machine IJ Rudas et al. ...
2013 IEEE 9th International Conference on Computational Cybernetics (ICCC), 2013
The paper deals in short with the various algorithms useful in determining the pitch distances of... more The paper deals in short with the various algorithms useful in determining the pitch distances of a linear scale. The main advantages and drawbacks from the point of our application are summarized. The environmental and distortional influences are discussed and some computational aspects are given.
ICASSP '82. IEEE International Conference on Acoustics, Speech, and Signal Processing
ABSTRACT Real-time machine monitoring is an open problem in machine tool industry. The presence o... more ABSTRACT Real-time machine monitoring is an open problem in machine tool industry. The presence of unmanned production systems increases the demands on such equipments. Success can be expected only by joint application of signal processing and pattern recognition methods. In real-time applications the speed of the system is of vital importance. In this respect the use of Walsh-Hadamard transform in preprocessing stage of the recognition system is investigated. Fourier and walsh transform of measured vibration data is compared. The paper gives an overview of the applicable methods of classification and feature selection . A multiprocessor-based real-time monitoring system is outlined, which system is under development.
The paper describes a new low cost angle generator intended for the calibration of autocollimator... more The paper describes a new low cost angle generator intended for the calibration of autocollimator. The description of the working principle is followed by the detailed calibration procedure which is based on the comparison principle. The small angles are derived from relatively large displacements. Following the presentation of the operation of the small angle generator, the various error sources are discussed. Finally the paper discusses the calculation of the extended calibration uncertainty in details. I.
In this paper the behavior of a novel, SVD-based adaptive controller is compared with that of the... more In this paper the behavior of a novel, SVD-based adaptive controller is compared with that of the most sophisticated and popular method introduced by Slotine & Li by the use of a three degree of freedom paradigm, the cart + double pendulum system with dynamic friction. The essential difference between the two approaches is that while the Slotine-Li method tries to identify the parameters of the precise analytical model of the robot on the basis of the assumption that the generalized forces are known, the novel one makes do with the temporal observation of the desired vs. realized response of the system and does not assume the lack of unknown perturbations caused e.g. by internal friction. Its another advantge is that it needs the execution of the SVD only on a rough model of the system only one times, before the commencement of the control cycle within which it works with simple computations. The novel method has the deficiency that in principle it can get out of the region of its convergence so its design and use needs preliminary simulation investigations. However, simulation examples exemplify that its convergence can be guaranteed for practical purposes.
2011 6th IEEE International Symposium on Applied Computational Intelligence and Informatics (SACI), 2011
... Gyula Hermann Óbuda University Bécsi út 96/B, H-1034 Budapest, Hungary e-mail: hermann.gyula@... more ... Gyula Hermann Óbuda University Bécsi út 96/B, H-1034 Budapest, Hungary e-mail: [email protected] ... 402-405 (1998) [15] JA Stone, M. Amer, B. Faust, J. Zimmerman Uncertainties in Small-Angle Measurement Systems Used to Calibrate Angle Artifacts ...
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