Error analysis for piecewise quadratic curve fitting algorithms

1986 ◽  
Vol 3 (3) ◽  
pp. 205-215 ◽  
Author(s):  
Ronald A. DeVore ◽  
Zheng Yan
Keyword(s):  
Error Analysis ◽  
Curve Fitting ◽  
Quadratic Curve

Measurement and Calibration of the Displacement and Pressure in Automatic Wheelset Assembly Machine

2012 ◽  
Vol 184-185 ◽  
pp. 296-300
Author(s):  
Jun Xiao ◽  
Rong Fang ◽  
Xin Cheng ◽  
Jian Bin Han
Keyword(s):  
Error Analysis ◽  
Measurement System ◽  
Curve Fitting ◽  
Pressure Sensor ◽  
Displacement Measurement ◽  
Zero Drift ◽  
Measurement Systems ◽  
System Pressure

This paper introduces the measurement systems of the oil cylinder in automatic wheelset assembly machine, theoretically analyzes the error of the displacement measurement system by curve fitting, and gets verification the error analysis in practice. This paper also calibrates pressure sensor from zero drift, slope of the output of the pressure sensor to guarantee the system pressure, and compensated pressure sensor value consistent.

Study on the Reverse Designing for Water Cavity Model of Engine’s Cylinder Head

2011 ◽  
Vol 328-330 ◽  
pp. 71-74 ◽  
Author(s):  
Min Chen ◽  
Xiao Xu Liu ◽  
Jian Ping Tian
Keyword(s):  
Error Analysis ◽  
Curve Fitting ◽  
Cylinder Head ◽  
Complex Surface ◽  
Cavity Model ◽  
Cloud Data ◽  
Cloud Points ◽  
Slicing Method ◽  
Fitting Error ◽  
Reverse Methods

The water cavity model of engine’s cylinder head is reconstructed by CAD through slicing method. The reverse design methods which are used for complex interior structure’s surface are explored based on slicing method and using software such as Imageware and UG, through modeling the water cavity. The technologies of reverse design such as the measure method of points cloud, points cloud data treatment, curve fitting, fitting error analysis, surface reconstructive and solid modeling are studied. The reverse methods for complex surface are put forward which are based on blocks and features of model. Through the practice of reversing design for cylinder head water cavity model, it is proven that the complex inner cavity components can be reversed by slicing method. The methods can be referenced for similar reverse design.

High-quality quadratic curve fitting for scanned data of styling design

2016 ◽  
Vol 71 ◽  
pp. 39-50 ◽  
Author(s):  
Shoichi Tsuchie ◽  
Kunio Okamoto
Keyword(s):  
Curve Fitting ◽  
High Quality ◽  
Quadratic Curve

Parameter Adjustment Method of Kalman Filter Based on Quadratic Curve Fitting

2021 ◽  
Author(s):  
Xinli Xiong ◽  
Kuan Wang ◽  
Jianbin Chen ◽  
Tao Li ◽  
Haoyun Deng ◽  
...  
Keyword(s):  
Kalman Filter ◽  
Curve Fitting ◽  
Parameter Adjustment ◽  
Adjustment Method ◽  
Quadratic Curve
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