Thematische Bibliographien / Perpendicularity compensation

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Auswahl der wissenschaftlichen Literatur zum Thema „Perpendicularity compensation“

Autor: Grafiati

Veröffentlicht am 28. Juni 2021

Zuletzt aktualisiert am 18. Februar 2022

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Zeitschriftenartikel zum Thema "Perpendicularity compensation"

Zhao, Guo Yong, Shi Jun Wang und Wen Tao Sui. „Compensation Approach to Error of Perpendicularity and Mismatch Error of Position Loop Gains in CNC Machine“. Applied Mechanics and Materials 121-126 (Oktober 2011): 3190–94. http://dx.doi.org/10.4028/www.scientific.net/amm.121-126.3190.

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The contour precision has been an important CNC machine accuracy index along with the increase of high precision complex parts NC machining. The error of perpendicularity and the mismatch error of position loop gains among linked axes are regarded as the prime reasons to bring about CNC machine contour error. After analyzing the influence of the error of orthogonal axes perpendicularity to CNC machine contour precision, a compensation approach is set up that the following error is corrected in each sampling period, by introducing a perpendicularity deflection parameter. After analyzing the influence of the mismatch error of position loop gains to contour precision, a cross-coupled control approach based on interpolation dots is developed to enhance the matching degree among all of the linked axes. Finally, the developed compensation approaches are testified on a CNC experiment table. The experimentation results reveal that the developed compensation approaches are effective to enhance contour precision.

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Wang, Xiu Shan, Yan Li und Yong Chang Yu. „Study of the Geometrical Error Modeling of NC Lathe Based on Multi-Body System Theory“. Advanced Materials Research 139-141 (Oktober 2010): 1093–96. http://dx.doi.org/10.4028/www.scientific.net/amr.139-141.1093.

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The geometrical error modeling of the numerically controlled (NC) lathe is the key technique to kinematics design, precision analysis and error compensation. The study gives out the modeling process of the generally geometrical error model based on the multi-body system theory for the multi-axis NC machine tools. By the multi-system theory, using the low series body arrays to describe the complex mechanical system, the article has finished the geometrical error modeling of the numerically controlled lathe, analyzed the influence on the model of error of perpendicularity between the linear axes. The modeling method is highly-efficient and can not be affected by the structure of the NC machine tools. The error compensation and command correction can be implemented by the geometric errors model.

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Jia, Zhenyuan, Jinghao Yang, Wei Liu, Fuji Wang, Yang Liu, Lingli Wang, Chaonan Fan und Kai Zhao. „Improved camera calibration method based on perpendicularity compensation for binocular stereo vision measurement system“. Optics Express 23, Nr. 12 (01.06.2015): 15205. http://dx.doi.org/10.1364/oe.23.015205.

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Liu, H. L. „Effects of Rotation Angle on the Circular Test of Geometric Errors“. Key Engineering Materials 295-296 (Oktober 2005): 289–94. http://dx.doi.org/10.4028/www.scientific.net/kem.295-296.289.

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DBB was originally manufactured and proposed for checking the accuracy of NC machine tools. The device can also be used to study the relations between motion error of trace and the machine motion error for the purpose of error compensation. The nominal angle obtained through rotation feed rate and sampling time was adopted instead of actual angle which cannot be measured by the device. This project examined in details the effect of the angle deviation problem caused by non-perpendicularity between the movements in axis X and axis Y. The analysis and calculation verified that a squareness deviation would lead to more than 3 times error at some special points, decreasing the accuracy of NC machines for error compensation. For this reason, a device called as Two-Dimensional Ball Bar is proposed based on the DBB.

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Li, Guo Ping, Yan Bin Gao, Ting Jun Wang und Lian Wu Guan. „Error Auto-Compensation Methods of Improved Single-Axial Rotation INS“. Advanced Materials Research 791-793 (September 2013): 1046–49. http://dx.doi.org/10.4028/www.scientific.net/amr.791-793.1046.

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An Auto-Compensation of inertial navigation system (INS) based on improved single-axis rotation has been proposed in the paper. Inertial Measurement Unit (IMU) is tilt mounted, e.g. neither perpendicularly, nor coaxially, with the rotation axis. Analysis and derivation show that this angle arrangement of IMU can restrain the expansion of the system errors caused by IMU. Simulations demonstrated the coincidence of the theoretical analysis and the system performances

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Ishikawa, K., K. Akagi, K. Mohri, Y. Kashiwagi, H. Fukasaku und L. V. Panina. „Compensation for Temperature Variation in Magnetostricitive Torque Sensor Using Perpendicularly Magnetizing Coils“. Journal of the Magnetics Society of Japan 16, Nr. 4 (1992): 649–54. http://dx.doi.org/10.3379/jmsjmag.16.649.

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Ishikawa, K., K. Akagi, K. Mohri, Y. Kashiwagi, H. Fukasaku und L. V. Panina. „Compensation for Temperature Variation in Magnetostrictive Torque Sensor Using Perpendicularly Magnetizing Coils“. IEEE Translation Journal on Magnetics in Japan 8, Nr. 4 (April 1993): 269–76. http://dx.doi.org/10.1109/tjmj.1993.4565618.

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Izdebski, Marek, Rafał Ledzion und Włodzimierz Kucharczyk. „Precise Method for Measuring the Quadratic Electro-Optic Effect in Noncentrosymmetric Crystals in the Presence of Natural Birefringence“. Materials 13, Nr. 18 (06.09.2020): 3942. http://dx.doi.org/10.3390/ma13183942.

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The application of the improved dynamic polarimetric method for the measurement of the quadratic electro-optic effect in NH4H2PO4 (ADP) crystal with the light beam propagating perpendicularly to its optical axis is presented. This technique can be applied in noncetrosymmetric crystals in the presence of natural birefringence even when the fast and slow rays diverge slightly, causing them to only partially interfere. The method allows for minor errors in cutting and orientation of the crystal samples, resulting in deviations from configurations in which the crystal symmetry vetoes the linear electro-optic effect. The occurring contribution of the linear effect, if it is not too large, not only does not exclude the measurement of the quadratic effect, but increases its accuracy. The method does not require any prior compensation for the natural birefringence. Its sensitivity allows for quadratic electro-optic effect measurements in ferroelectrics in temperatures significantly different from the phase transition temperature or in paraelectric crystals, for which this effect is relatively small.

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Kraus, Matthias, Erik Förster, Verena Bagusat, Tobias Hönle, Xavier Uwurukundo, Patrick Bohnert, Robert Brüning, Hartmut Hillmer und Robert Brunner. „Compact, astigmatism corrected cross-grating spectrometer“. EPJ Web of Conferences 238 (2020): 03005. http://dx.doi.org/10.1051/epjconf/202023803005.

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Compact cross-grating spectrometers are inspired by classical high-end Echelle spectrometers and allow to acquire a large spectrum with a high spectral resolution in a single shot. To decrease the size of an Echelle spectrometer substantially, a cross grating was employed combining both required dispersive functionalities. First, an Echelle grating diffracts light in several higher diffraction orders, while a superposed, perpendicularly oriented cross-disperser is used in first diffraction order. In this contribution, we report on the realization of a cross-grating spectrometer employing a folded reflective beam path. A toric-convex mirror was introduced allowing aberration compensation. We present the basic concept and optical design of the system and discuss the mechanical implementation and the adjustment process. Here, different laser sources and gas emission lamps are used to realize the system and derive the optical performance. In particular, the spectral resolution in the different diffraction orders is determined for the realized device.

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Jiao, Xiankai, Zongzhi Zhang und Yaowen Liu. „Modeling of Temperature Dependence of Magnetization in TbFe Films — An Atomistic Spin Simulation Study“. SPIN 06, Nr. 01 (März 2016): 1650003. http://dx.doi.org/10.1142/s201032471650003x.

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In this paper, we performed spin simulations at atomistic level to study the temperature dependent properties of perpendicularly magnetized TbFe thin films. The crystallographically amorphous feature of TbFe ferrimagnetic alloys is modeled by using a lattice system with disordered site occupation of rare earth (RE) and transition metal (TM) spins. The simulated Curie temperature ([Formula: see text]) is consistent well with the mean-field approximation theory. With the increase of Tb concentration, the [Formula: see text] decreases almost linearly, whereas the magnetization compensation temperature ([Formula: see text]) increases gradually until the [Formula: see text] value is reached. The inter-sublattice exchange coupling strength [Formula: see text] between the RE and TM atoms can significantly affect [Formula: see text], but has less impact on [Formula: see text]. With the increase of Tb concentration, the TbFe sample of high [Formula: see text] exhibits a much faster increase in [Formula: see text] than the sample with low [Formula: see text]. Moreover, we have tested the simulation code to model the laser pulse induced ultrafast nonequilibrium spin dynamics. As an example, the femto-second pulse laser induced demagnetization and recovery process is clearly reproduced. These features are in a good agreement with the experiments, indicating that the simulation model can capture the basic physics in describing the high temperature dependent magnetic property as well as the ultrafast spin dynamics.

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Dissertationen zum Thema "Perpendicularity compensation"

Mišún, Filip. „Návrh automatického cyklu pro posuzování způsobilosti měření obrobkovou sondou na obráběcím centru“. Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2021. http://www.nusl.cz/ntk/nusl-443252.

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This diploma thesis describes the procedures of individual electronic compensations for CNC machines used to increase the accuracy of machines. This part is followed by the determining tolerance of the measuring and the influence of individual electronic compensations based on measured data using touch probe and calibrated standards according to VDA 5 norm.

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Konferenzberichte zum Thema "Perpendicularity compensation"

Qin, Haichen, Jianzhou Quan, Bo Peng und Zhouping Yin. „Analysis and compensation of perpendicularity error for high speed and high precise IC assembly equipment base on coordinate transformation“. In High Density Packaging (ICEPT-HDP). IEEE, 2009. http://dx.doi.org/10.1109/icept.2009.5270571.

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Chiavaroli, P., A. De Martin, G. Evangelista, G. Jacazio und M. Sorli. „Real Time Loading Test Rig for Flight Control Actuators Under PHM Experimentation“. In ASME 2018 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/imece2018-86967.

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The article deals with the architecture, performance, and experimental tests of a test bench for servo-actuators used in flight controls. After the state of the art on the subject, the innovative architecture of the built bench is described, in which flight control actuator under test and load actuator are not in line but mounted perpendicularly. The model of the bench actuating systems is then presented, consisting of the servo-controlled hydraulic actuator, load cell, speed transducer, angular position transducer of the coupling and pressure transducers. For each of these components the nonlinear multi-physics mechatronic model is described, according to the adopted solutions. The adopted force control algorithm is discussed, showing the integrative compensation on the action line and proportional-derivative on the feedback, with speed feedforward. The experimental tests carried out on the bench under stalled conditions are also presented, whose results concerning time and frequency responses are compared with those obtained through the linearized and non-linear numerical model. Finally, the non-linear models of the flight control actuator under test, controlled in position, and of the loading servo-actuator of the bench are joined together, and the results of various simulations are described.

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Sodemann, Angela A., und Yogesh M. Chukewad. „Comparison of Cartesian and Polar Kinematic Arrangements for Compensation of Scale Effects in Micromilling“. In ASME 2013 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/imece2013-65002.

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Many fields of active research such as biomedical engineering, electronics, and optics have need of small metallic parts less than 1mm in size, with features measured in hundreds or tens of microns, with tolerances as small as 0.1 micron. Such parts include devices for studying the processes in the human body, devices that can be implanted in the human body, small lenses, and other small components. Micromilling is a microscale manufacturing process that can be used to produce a wide range of small parts, including those that have complex 3-dimensional contours. Micromilling is a process that is, on the surface, similar to conventional-scale milling, except for the use of tools that are around two orders of magnitude smaller than conventional endmills, and spindle speeds that are one or two orders of magnitude faster than conventional milling spindles. However, the underlying physical processes which occur in micromilling are unique due to scale effects, which occur due to the unequal scaling of physical properties between the conventional and the micro scale. One of the more recently-uncovered scale effects in micromilling is the increased ratio of tool size to feature size [1]. This scale effect causes an exacerbation of a kind of geometric error known as chord error and places a fundamental limitation on achievable feedrates within allowable machining error constraints. In this research, we hypothesize that the increase of chord error in microscale milling can be alleviated by intelligent modification of the kinematic arrangement of the micromilling machine. Currently, all 3-axis micromilling machines are constructed with a Cartesian kinematic arrangement, in which three linear axes are mounted perpendicularly. In this paper, we propose an alternate kinematic arrangement consisting of two linear axes and one rotary axis, creating a Polar kinematic arrangement. Through numerical simulation, we show that there are distinct classes of curvilinear geometries in which the Polar kinematic arrangement is preferable, and allows significant gains in allowable feedrates and reduction in chord error, while other curvilinear geometries show reduced chord error with the Cartesian arrangement.

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Matsui, Yutaka, und Yukinori Iizuka. „Basic Performance of Normal Incidence Method for Inspection of Middle Zone of Wall Thickness of LSAW Steel Pipes“. In 2016 11th International Pipeline Conference. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/ipc2016-64328.

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This paper describes the performance of the ultrasonic normal incidence method as a technique for inspection of the middle zone of wall thickness of LSAW (Longitude Submerged Arc Welding) steel pipes. Generally, the tandem method is applied to LSAW seam inspection of the middle zone of wall thickness. However, it is difficult to adjust the locations and angles of each probe. Therefore, the normal incidence method using one probe for inspection of the middle zone of wall thickness was studied. Because the probe arrangement is simple, it is possible to reduce the time and effort required to adjust the probe location and angle. In the normal incidence method, it is possible to transmit and receive a mirror reflection because the ultrasonic wave is transmitted perpendicularly to a planar flaw under a high refraction angle. As a result of comparison experiments of the normal incidence method and tandem method, the amplitude of the echo from flat bottom drilled hole (F.B.H.) is 12dB higher in the normal incidence method than in the tandem method. The normal incidence method also has wide area sensitivity in the circumferential direction, however, the amplitude of the reflection echo changes ±25% when the incidence angle of the pipe changes ±0.3°. Thus, in practical applications, strict control of the deviation of the pipe incidence angle is necessary. This suggests that the reliability of this technique can be improved by compensating for sensitivity variations, for example, fluctuations associated with tracking backlash.

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