scholarly journals Optimized Design and Calibration of the Triaxis Induction Magnetometer with Crosstalk and Nonorthogonality Compensation

2016 ◽  
Vol 2016 ◽  
pp. 1-8
Author(s):  
Hongyu Shi ◽  
Yanzhang Wang ◽  
Jun Lin
Keyword(s):  
Theoretical Analysis ◽  
Magnetic Flux ◽  
Least Square Method ◽  
Error Component ◽  
Least Square ◽  
Optimized Design ◽  
Frequency Dependent ◽  
Compensation Algorithm ◽  
Sensor Configuration ◽  
Dependent Error

An optimized triaxis induction magnetometer has been designed and calibrated to minimize the influences from the nonorthogonality and the magnetic flux crosstalk. Utilizing the nonlinear least square method, contributions due to the nonorthogonal assembly of three transducers are cancelled. The magnetic flux crosstalk is a frequency-dependent error component in the calibration of the triaxis induction magnetometer. Influences from the assembly density, the frequency, and the feedback amount are analyzed theoretically, and an optimized sensor configuration which has a smaller crosstalk is achieved. Moreover, a mathematical compensation algorithm has also been utilized to suppress the residues crosstalk ulteriorly. To validate the theoretical analysis, a triaxis induction magnetometer was manufactured and the experiment setup has also been built. The experiment results show that the cross-outputs of the transverse induction magnetometers have been significantly decreased about two orders, indicating that the proposed method is applicable for the triaxis induction magnetometer.

scholarly journals The Effect of E-Commerce on National Income in 114 Countries

2019 ◽  
pp. 148-155
Author(s):  
Rasi Tamadhika Fajar Ramadhan ◽  
Bambang Juanda ◽  
Muhammad Findi Alexandi
Keyword(s):  
Purchasing Power Parity ◽  
National Income ◽  
Least Square Method ◽  
Positive Influence ◽  
Error Component ◽  
Least Square ◽  
Information Communication ◽  
Power Parity ◽  
Economic Activities ◽  
Section Data

Information, Communication and Technology (ICT) was growing rapidly. E-commerce creates new economic activities through technology, especially in the field of trade. The main objective of the studied was to analyze the effect of e-commerce on national income. The analysis was performed by EC2SLS (Error Component-Two Stage Least Square) method. Analysis using panel data with cross section data of 114 countries in the 2016-2017 period. The data used were GDP data based on purchasing power parity (PPP); previous year's GDP; e-commerce users; ICT services exports and imports; government spending; investment (FDI); country dummy. The analysis shows that e-commerce had a significant effect on national income. E-commerce for 113 other countries had a positive influence of 0.0026% while e-commerce for indonesia had a positive influence of 0.0080%.

scholarly journals Payload Identification and Gravity/Inertial Compensation for Six-Dimensional Force/Torque Sensor with a Fast and Robust Trajectory Design Approach

Sensors ◽  
2022 ◽  
Vol 22 (2) ◽  
pp. 439
Author(s):  
Jinjun Duan ◽  
Zhouchi Liu ◽  
Yiming Bin ◽  
Kunkun Cui ◽  
Zhendong Dai
Keyword(s):  
Force Control ◽  
Inertial Force ◽  
Least Square Method ◽  
Force Sensor ◽  
Rapid Identification ◽  
Least Square ◽  
Trajectory Design ◽  
Identification Algorithm ◽  
Torque Sensor ◽  
Compensation Algorithm

In the robot contact operation, the robot relies on the multi-dimensional force/torque sensor installed at the end to sense the external contact force. When the effective load and speed of the robot are large, the gravity/inertial force generated by it will have a non-negligible impact on the output of the force sensor, which will seriously affect the accuracy and effect of the force control. The existing identification algorithm time is often longer, which also affects the efficiency of force control operations. In this paper, a self-developed multi-dimensional force sensor with integrated gravity/inertial force sensing function is used to directly measure the resultant force. Further, a method for the rapid identification of payload based on excitation trajectory is proposed. Firstly, both a gravity compensation algorithm and an inertial force compensation algorithm are introduced. Secondly, the optimal spatial recognition pose based on the excitation trajectory was designed, and the excitation trajectory of each joint is represented by a finite Fourier series. The least square method is used to calculate the identification parameters of the load, the gravity, and inertial force. Finally, the experiment was verified on the robot. The experimental results show that the algorithm can quickly identify the payload, and it is faster and more accurate than other algorithms.

scholarly journals Carbon Dioxide Sensor Module Based on NDIR Technology

Micromachines ◽  
2021 ◽  
Vol 12 (7) ◽  
pp. 845
Author(s):  
Libing Zhou ◽  
Yaoyi He ◽  
Qing Zhang ◽  
Lei Zhang
Keyword(s):  
Light Propagation ◽  
Detection System ◽  
Coupling Efficiency ◽  
Least Square Method ◽  
Least Square ◽  
Compensation Algorithm ◽  
Dual Channel ◽  
Sensor Module ◽  
Gas Chamber ◽  
Channel Type

In this paper, a gas detection system with an environmental compensation algorithm based on nondispersive infrared (NDIR) technology was designed. The prepared infrared pyroelectric detector was a dual-channel type based on the lithium tantalate (LiTaO3) wafer. The design of the optical gas chamber adopted a combination of two ellipsoids and a spherical top surface, which not only enhanced the coupling efficiency of the light propagation but also facilitated the miniaturization of the sensor module. In addition to this, a temperature and humidity compensation algorithm based on the least square method was proposed to make the measurement accuracy up to ±0.9% full scale (FS).

Evaluation Method and Simulation Analysis of Gap Roundness Error

2009 ◽  
Vol 16-19 ◽  
pp. 1243-1247
Author(s):  
Lei Zhang ◽  
Ying Zhao ◽  
Dong Rong Zheng ◽  
Ke Zhang
Keyword(s):  
Mathematical Model ◽  
Theoretical Analysis ◽  
Evaluation Method ◽  
Simulation Analysis ◽  
Evaluation Model ◽  
Least Square Method ◽  
Least Square ◽  
Roundness Error ◽  
Measuring Experiment

Theoretical analysis of existing evaluation method of gap roundness error and existing evaluation model of full roundness error is provided. Mathematical model of gap roundness error’s evaluation with least square method is founded based on the evaluation model of full roundness error, which gives a solution of gap roundness error. The results of the simulation analysis and measuring experiment show that mathematical model of gap roundness error’s evaluation with least square method is correct for computing gap roundness error.

Research on a Kind of Quick Background Motion Compensation Algorithm Based on BRISK Operator

2014 ◽  
Vol 668-669 ◽  
pp. 1178-1181 ◽  
Author(s):  
Yan Min Lei ◽  
Zhi Bin Feng ◽  
Shu Jiao Ji ◽  
Xiao Xue Xing
Keyword(s):  
Real Time ◽  
Motion Compensation ◽  
Video Sequence ◽  
Interpolation Method ◽  
Motion Vector ◽  
Least Square Method ◽  
Least Square ◽  
Compensation Algorithm ◽  
Time Problem ◽  
Background Motion

In order to solve the real-time problem in the background motion compensation in video sequence, a kind of quick background motion compensation algorithm based on BRISK operator has been proposed in this paper. Firstly, feature points of two adjacent frames images was extracted and matched by using BRISK operator. Secondly, the motion vector of the neighboring frames images was calculated by using the least square method (LSM). Lastly, the video sequences were compensated by using bilinear interpolation method. The simulation results show that real-time can arrive at ms grade and meet the requirement of background motion compensation.

Direct Assessment of Effective Renal Plasma Flow from Renoscintigraphy with a Gamma Camera and an On-Line Computer

1981 ◽  
Vol 20 (06) ◽  
pp. 274-278
Author(s):  
J. Liniecki ◽  
J. Bialobrzeski ◽  
Ewa Mlodkowska ◽  
M. J. Surma
Keyword(s):  
Count Rate ◽  
Renal Plasma Flow ◽  
Early Period ◽  
Least Square Method ◽  
Least Square ◽  
Uptake Coefficient ◽  
Positive Linear Correlation ◽  
On Line ◽  
Best Fit ◽  
Plasma Activity

A concept of a kidney uptake coefficient (UC) of 131I-o-hippurate was developed by analogy from the corresponding kidney clearance of blood plasma in the early period after injection of the hippurate. The UC for each kidney was defined as the count-rate over its ROI at a time shorter than the peak in the renoscintigraphic curve divided by the integral of the count-rate curve over the "blood"-ROI. A procedure for normalization of both curves against each other was also developed. The total kidney clearance of the hippurate was determined from the function of plasma activity concentration vs. time after a single injection; the determinations were made at 5, 10, 15, 20, 30, 45, 60, 75 and 90 min after intravenous administration of 131I-o-hippurate and the best-fit curve was obtained by means of the least-square method. When the UC was related to the absolute value of the clearance a positive linear correlation was found (r = 0.922, ρ > 0.99). Using this regression equation the clearance could be estimated in reverse from the uptake coefficient calculated solely on the basis of the renoscintigraphic curves without blood sampling. The errors of the estimate are compatible with the requirement of a fast appraisal of renal function for purposes of clinical diagknosis.

PENGARUH KNOWLEDGE MANAGEMENT, KOMPETENSI, MOTIVASI TERHADAP KINERJA KARYAWAN

2015 ◽  
Vol 5 (2) ◽  
pp. 1
Author(s):  
Miftahol Arifin
Keyword(s):  
Knowledge Management ◽  
Linear Regression ◽  
Significant Influence ◽  
Employee Performance ◽  
Least Square Method ◽  
Least Square ◽  
Analysis Tool ◽  
Ordinary Least Square ◽  
Competence Motivation ◽  
Performance Analyze

The purpose of this research is to analyze the influence of knowledge management on employee performance, analyze the effect of competence on employee performance, analyze the influence of motivation on employee performance). In this study, samples taken are structural employees PT.centris Kingdom Taxi Yogyakarta. The analysis tool in this study using multiple linear regression with Ordinary Least Square method (OLS). The conclusion of this study showed that the variables of knowledge management has a significant influence on employee performance, competence variables have an influence on employee performance, motivation variables have an influence on employee performance, The analysis showed that the variables of knowledge management, competence, motivation on employee performance.Keywords: knowledge management, competence, motivation, employee performance.

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