error compensation of coordinate measuring machines

... measurement speed is to obtain sufficient knowledge of all the dynamic errors and to apply software error compensation for these errors The method of software compensation has been applied successfully ... P., Development of a fast mechanical probe for coordinate measuring machines Ph.D thesis, Eindhoven University of Technology, 1996 12 VDI/VDE 2617, Accuracy of coordinate measuring machines; Characteristic ... estimation of the error in y-direction will be given here This error is the most significant error for this CMM, and there are significant contributions of four parametric errors Three of these errors...

Ngày tải lên: 24/11/2016, 18:09

... first implementation of software-based geometric error correction was for scale length, a simple linear compensation For measuring machines used in 28 Coordinate Measuring Machines and Systems ... Paulo H Pereira and Jun Ni Chapter 12 Error Compensation of Coordinate Measuring Machines 319 Guoxiong Zhang Chapter 13 “Reversal” Techniques for Coordinate Measuring Machine Calibration ... Early Coordinate Measuring Machines ����17 1.6 First Coordinate Measuring Machine Developed as Aid to Automated Machining 19 1.6.1 Sheffield Introduces Coordinate Measuring Machines...

Ngày tải lên: 17/02/2016, 14:35

... learning laws of ANNs and the linguistic transparency of fuzzy logic theory within the framework of adaptive networks Fuzzy inference systems (FIS) are one of the most well-known applications of fuzzy ... number of MFs and their types in each dimension [27] The limitation of this method is that the number of rules rises rapidly as the number of inputs (sensors) increases For example, if the number of ... clusters for thermal error compensation models [33] Selection of input variables A large number of thermal sensors may have a negative influence on predication accuracy and robustness of a thermal prediction...

Ngày tải lên: 26/09/2015, 12:04

... Effecu of RE on: (a) log-domain integrator, and (b) the log-domain biquad 37 Effects of RE on filter cutoff frequency 38 Simulated results of nonzero RE compensation 39 Effects of ... Deviation of Equation (3.15) Compensation of RE 87 Goodness of Fit Test 88 References 90 List of Figures 1 A general closed-loop of forward-biased junction demonstrating ... to the Faculty of Graduate Studies and Research in partial fulfilment of the requirements for the degree of Master of Engineering O Vincent W Leung, 1998 191 National Library ofCana, Bibliothèque...

Ngày tải lên: 06/11/2012, 10:35

... corpus • classification of the errors identified • explanation of the causes of the errors • evaluation or error gravity ranking of the errors However, for the characteristics of this particular study, ... 14 1.2 Errors in language learning process .16 1.2.1 The notion of errors .16 1.2.2 Error versus mistake 17 1.2.3 Error analysis .18 1.2.4 Causes of errors ... 1.2.4 Causes of errors in second language learning Second language learners often trigger a numerous amount of errors It is claimed by Richards (1992) that there are two main causes of errors that...

Ngày tải lên: 18/12/2013, 10:08

... number of turns in series number of coil turns in series in a single pole Nusselt number number of bars of a coil side in the slot number of turns of compensating winding number of turns of one ... depiction of a phase magnetic voltage [A] peak value of the impulse voltage [V] coil voltage [V] terminal of the head of the U phase of a machine terminal of the end of the U phase of a machine ... Jacobian matrix moment of inertia of load [kg m2 ] moment of inertia of the motor, [kgm2 ] saturation of polarization [V s/m2 ] surface current, vector [A/m] difference of the numbers of slots per pole...

Ngày tải lên: 07/03/2014, 10:20

... about the number of sentences and errors in the project, average number of errors per sentence, and how many sentences there are with certain numbers of errors The main part of the statistics ... search for errors of a certain type To search, users choose the error type they want to search for in the error typology, and then search backwards or forwards for error annotations of that type ... handle two types of annotations: error annotations and support annotations Error annotations are based on a hierarchical error typology, and are used to annotate errors in MT output Error annotations...

Ngày tải lên: 07/03/2014, 22:20

... teachers to study the patterns in the writing errors of non native Identification of errors: Actual Description of errors Evaluation of errors speakers of English language to investigate the learning ... acceptance of an error These errors can Conclusion initiate further research into the error studies The results of the study show that majority about the possibility of fossilization of such of errors ... students English language proficiency Identification of errors: Actual errors 3.2 Instrument Description of errors: Categorization The instrument used in the study is essays of errors based on their...

Ngày tải lên: 24/03/2014, 19:20

... much less often, and use proper nouns significantly more often Although “car” also appears in the top ten errors on the JDPA documents, the total percentage of the errors is one fifth of the error ... results of the system on the test portion of the corpus The results are further broken out by three different source types to highlight the differences caused Relation FEATURE OF MEMBER OF PART OF ... many more of the errors are due to a few specific phrases being classified incorrectly such as “car”, “Maybach”, and various forms of “it” The top four phrases constitute 17% of the errors for...

Ngày tải lên: 30/03/2014, 21:20

... top of the sheet of paper he had couched off previously These activities were repeated over and over, until a pile of usually 144 sheets of paper, had been formed and couched, each sheet of wet ... before moulding the sheet of paper The formation of hydrogen bonds between the surfaces of plant (cellulose) fibres is the final act of consolidation of the wet sheet of paper accomplished without ... friends of the old customs, and the authorities of Saxony advocated, in 1764, the abolition of the “customs”, but without success In the opinion of Renker: This decree of King Sigismund I of Poland,...

Ngày tải lên: 01/04/2014, 00:20

Ngày tải lên: 24/04/2014, 15:38

... biological activity of this series of compounds However, the small number of compounds and the limited diversity of the substituents in this dataset might not reveal the importance of those structural ... two classes of patterns 306 Applications of Support Vector Machines in Chemistry +1 +1 +1 +1 −1 +1 −1 +1 +1 +1 −1 −1 −1 −1 −1 −1 −1 Figure 18 Examples of margin hyperplane classifiers of wide margin ... estimation of finite set classifiers and the convergence of their classification performance toward that of a classifier with an infinite number of learning samples Consider a learning set of m patterns...

Ngày tải lên: 02/06/2014, 09:46

... Adaptive Motion of Animals and Machines With 241 Figures ABC Hiroshi Kimura Graduate School of Information Systems University of Electro-Communications 1-5-1 Chofu-ga-oka, Chofu, Tokyo 182-8585, ... sudden deceleration of the distal masses The properties of the heel pad, of the sole of the running shoes, the viscoelastic suspension of the muscles (Fig.3), comprising a large part of the distal ... walking of insect, so we discuss the control of the motor system after the decision-making, that is, selection of the behavior The higher center of brain sends the velocities of the both sides of...

Ngày tải lên: 12/06/2014, 12:02

... movements of the two hind legs are out of phase as are the movements of the two forelegs The difference between the three gaits is the timing of the stepping of the two legs on each side of the animal ... the area of autonomous robots in general, and especially in the field of embodied intelligence Autonomous walking machines are challenging systems because the coordination of many degrees of freedom ... morphologies of walking animals and their principle of locomotion control to benefit the design of the physical four- and six-legged walking machines • Achieve autonomous walking machines interacting...

Ngày tải lên: 12/06/2014, 12:06

... Figure 4: Design of an N = 35, M = 5, ω p = 0.9π, p ∈ [−0.65, 0.35] allpass VFD filter (a) Absolute group-delay errors of the proposed LS design (b) Absolute group-delay errors of the proposed ... polynomials of p an p = − pω 2.2 Frequency-Response-Oriented Approximation An alternative view point of the design problem is the direct approximation of (2) by (7), that is, the error function ... details of iterative procedures will be described in the next section To evaluate the accuracy of the designed system, the normalized root-mean-squared group-delay error, the maximum group-delay error, ...

Ngày tải lên: 21/06/2014, 07:20

... versus SNR for OFDM system (a) D-FEQ based transmitter IQ imbalance compensation for a 16QAM OFDM system Frequency independent amplitude imbalance of gt , gr = 5% and phase imbalance of φt , φr = ... the frequency selectivity of the channel to obtain effective compensation performance Thus, in the case of strict frequency flatness over the entire OFDM symbol, joint compensation scheme as shown ... that typically results in a sequence of length Na + Nb − System Model Let S be an uncoded frequency domain OFDM symbol of size (N × 1) where N is the number of tones This symbol is transformed...

Ngày tải lên: 21/06/2014, 08:20

... that the BEP of M-QAM modulation subject to AWGN is expressed in terms of a weighted sum of complementary error functions The term erfc(·) in (25) corresponds to twice the probability of the additive ... following a compensation of the MD, the signal fed to the detector may include only a single additive distortion term, which comprises the effects of the original additive noise, the MD, and the error ... MD, and the error in MD compensation In [15], the probability density function of that single additive distortion was derived and used to obtain the error probability of some modulation schemes...

Ngày tải lên: 21/06/2014, 08:20

... an OBO of 4.7 dB We have set the parameters of the MOP PD to K = and Q = for the order of orthogonal polynomial and length of memory, respectively Moreover, we chose a forgetting factor of λ = ... the EVM performance of the MOP PD in the presence of IQ imbalance in QM The EVM criterion is of fundamental importance as it is linked with the symbol error rate (SER) or bit error rate (BER) performance ... for estimation and compensation of the IQ imbalance based on the envelope of the output signal at QM The adaptation of the RLS algorithm is to minimize the criterion J on the error eqm [n] = s[n]...

Ngày tải lên: 21/06/2014, 20:20

... 2001 [13] D Tandur and M Moonen, “Joint compensation of OFDM transmitter and receiver IQ imbalance in the presence of carrier frequency offset,” in Proccedings of European Signal Processing Conference ... Let S(i) be a frequency domain complex OFDM symbol of size (N × 1) where i is the time index of the symbol For our data model we consider two successive OFDM symbols transmitted at time i − and ... version of the received signal (z2 = z∗ ) Adding the second TEQ generally leads to a better combined shortening of d1 and d2 Let L be the number of taps used in each TEQ w1 and w2 , then the size of...

Ngày tải lên: 22/06/2014, 19:20

... IMBALANCE COMPENSATION One possible way of approaching the I/Q imbalance compensation is to consider the I/Q matching of each individual front-end separately This being the case, any of the earlier ... Channel estimation error figure of merits with transmitter and receiver I/Q imbalances and received SNR of 20 dB, as a function of subcarrier index k in a × 256-subcarrier STC-OFDM system; extended ... efficiency of pilot-based I/Q imbalance compensation Next, the overall system performance with the proposed imbalance compensation scheme included is evaluated in terms of the detection error rates...

Ngày tải lên: 22/06/2014, 19:20