Results 51 to 60 of about 145,469 (230)

High-precision compensation method for the form error of a glass aspheric lens in precision glass molding

iScience
Summary: Addressing challenges in controlling viscoelastic shrinkage-induced thermal deformation errors in precision glass molding, this article proposes a mold compensation method that combines the pre-compensation of form error prediction based on ...
Chengsong Shu, Daoheng Zhang, Shaohui Yin, Shuai Huang, Cunhong Yin   +4 more
doaj   +1 more source

Temperature compensation for quartz flexible accelerometer based on nonlinear auto-regressive improved model

Measurement + Control, 2023
Temperature variation is an important factor affecting the performance of Quartz flexible accelerometer (QFA). Performance deterioration of QFA degrades the navigation accuracy of inertial navigation system (INS).
Xin Wang, Chunxi Zhang, Lailiang Song, Longjun Ran, Tingyu Xiao   +4 more
doaj   +1 more source

Research into Image Point Positioning Compensation of a High-Orbit Thermal Infrared Staring Camera

Applied Sciences, 2023
The sight of the high-orbit thermal infrared staring camera is concentrated and sensitive to temperature changes, and therefore its image point positioning is key to ensuring the geometric quality of the thermal infrared staring image and eliminating the
Hui Xiao, Chenying Li, Qinghong Sheng, Bo Wang, Jun Li, Jianguo Ma, Fan Wu, Wei Zhou   +7 more
doaj   +1 more source

Neural network thermal error compensation of a machining center

Precision Engineering, 2000
Abstract A neural network based on Artificial Resonance Theory (ART-map) was used to predict and compensate the tool point errors of a 3-axis machining center using discrete temperature readings from the machine’s structure as inputs. A combination of kinematic error modeling, curve fitting, and the neural network were used to maintain the machine’s ...
Tetra Precision, Inc., Gainesville, FL, USA % ( host institution ), Mize, Christopher D ( author ), Ziegert, John C ( author )   +2 more
openaire   +2 more sources

Thermal Analysis for Condition Monitoring of Machine Tool Spindles

, 2012
Decreasing tolerances on parts manufactured, or inspected, on machine tools increases the requirement to have a greater understanding of machine tool capabilities, error sources and factors affecting asset availability. Continuous usage of a machine tool
Willoughby, P., Longstaff, Andrew P., Longstaff, A. P., Fletcher, Simon, Willoughby, Peter, Clough, D., Fletcher, S., Clough, David A   +7 more
core   +1 more source

Thermal Error Modeling and Compensation for a Motorized Spindle of a Large CNC Gear Profile Grinding Machine Tool

IEEE Access
To address thermally induced errors in a motorized spindle during the grinding process of a large computer numerical control (CNC) gear profile grinding machine tool, a thermal error modeling method based on the partial least squares (PLS) method was ...
Jie Xie, Chundong Zhou, Haibin Xu
doaj   +1 more source

Thermal Performance of a Multi-Axis Smoothing Cell [PDF]

, 2011
Multi Axis Robots have traditionally been used in industry for pick and place, de-burring, and welding operations. Increasing technological advances have broadened their application and today robots are increasingly being used for higher precision ...
Georgiou, Charalambos Andrew
core  

Efficient estimation by FEA of machine tool distortion due to environmental temperature perturbations

, 2013
Machine tools are susceptible to exogenous influences, which mainly derive from varying environmental conditions such as the day and night or seasonal transitions during which large temperature swings can occur.
Mian, Naeem, Fletcher, Simon, S. Fletcher, Longstaff, A.P., Naeem S. Mian, Fletcher, S., Myers, Alan, Longstaff, Andrew P., Myers, A., Mian, Naeem S., A.P. Longstaff, Longstaff, Andrew, A. Myers   +12 more
core   +1 more source

Dynamic modeling for spindle thermal error in machine tools under time-varying rotational speeds and cooling states

Case Studies in Thermal Engineering
To accurately predict and compensate for spindle thermal error under time-varying rotational speeds and cooling states, this paper proposes a novel dynamic thermal error modeling method characterized by a dual-attention-enhanced parallel branch ...
Ji Peng, Ke Yang, Zhirong Zhang, Yebing Mao, Feng Tan, Xiaobing Hu, Ming Yin, Zhoujie Zhao, Longjiang Li   +8 more
doaj   +1 more source

A New Synthesis Error Modeling and Compensating Algorithm of the Five-axis Machine Tools

工程科学与技术, 2013
:In order to construct the high precision error compersation model,the topological relationship of machine kinematics was simplified and 59 independent error components were analyzed.Based on the rigid body kinematics with small error assumption,a new ...
要小鹏, 殷国富, 方辉
doaj