Rapid High-Precision Non-Linear Calibration for Temperature Sensors in Transient Aerodynamic Heating Simulation Systems

2013 ◽  
Vol 321-324 ◽  
pp. 618-623 ◽  
Author(s):  
Da Fang Wu ◽  
Shuang Wu ◽  
Yue Wu Wang ◽  
Zhen Tong Gao ◽  
Jia Ling Yang
Keyword(s):  
High Precision ◽  
High Speed ◽  
Dynamic Control ◽  
Potential Temperature ◽  
Temperature Fields ◽  
Aerodynamic Heating ◽  
Heating Process ◽  
Linear Calibration ◽  
Linear Dynamic ◽  
Non Linear

In order to accurately simulate the transient aerodynamic heating conditions experienced by aircraft when flying at high speeds, rapid and highly precise non-linear dynamic control of the heating process in aerodynamic simulation experiments must be conducted using a transient heat flux control system. This process involves carrying out ‘thermoelectric potential - temperature (E-T)’ conversion of sensors. Here a fast and high-precision ‘E-T’ sensor conversion method for the transient aerodynamic heating control systems of high-speed aircraft is proposed. The developed method has the advantages of easy calculation, rapid conversion speed and high calibration precision, and can thus be employed for fast non-linear dynamic control of rapidly-changing temperature fields in the aerodynamic heating process of high-speed aircraft.

Fast and High Precision Thermoelectric Potential – Temperature Conversion Method for Aerodynamic Heating Control Systems

2013 ◽  
Vol 694-697 ◽  
pp. 955-960
Author(s):  
Da Fang Wu ◽  
Shuang Wu ◽  
Yue Wu Wang ◽  
Zhen Tong Gao ◽  
Jia Ling Yang
Keyword(s):  
Control Systems ◽  
High Precision ◽  
High Speed ◽  
Dynamic Control ◽  
Potential Temperature ◽  
Temperature Fields ◽  
Aerodynamic Heating ◽  
Heating Process ◽  
Easy Calculation ◽  
Conversion Method

A fast and high-precision ‘thermoelectric potential - temperature (E-T)’ sensor conversion method for the transient aerodynamic heating control systems of high-speed aircraft is proposed. The developed method has the advantages of easy calculation, rapid conversion speed and high calibration precision, and can thus be employed for fast non-linear dynamic control of rapidly-changing temperature fields in the aerodynamic heating process of high-speed aircraft.

scholarly journals LPV framework for Non-Linear Dynamic Control of Soft Robots using Finite Element Model

2020 ◽  
Vol 53 (2) ◽  
pp. 7312-7318
Author(s):  
Maxime Thieffry ◽  
Alexandre Kruszewski ◽  
Thierry-Marie Guerra ◽  
Christian Duriez
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Dynamic Control ◽  
Element Model ◽  
Soft Robots ◽  
Linear Dynamic ◽  
Non Linear

Research on Control of Heat Flux Environment Simulation for High-Speed Aircraft

2013 ◽  
Vol 705 ◽  
pp. 528-533 ◽  
Author(s):  
Da Fang Wu ◽  
Yue Wu Wang ◽  
Shuang Wu ◽  
Jia Ling Yang ◽  
Zhen Tong Gao
Keyword(s):  
Control System ◽  
Fuzzy Control ◽  
High Speed ◽  
Control Method ◽  
Process Time ◽  
Aerodynamic Heating ◽  
Heating Process ◽  
Transient Heating ◽  
Highly Nonlinear ◽  
Aerodynamic Simulation

The characteristics of the transient heating control process of aerodynamic simulation experiments are complicated, transient, highly nonlinear, and strongly coupled, which make it difficult or impossible to develop a mathematical model. By using the fuzzy control method, many good qualities (such as robustness, high adaptability to changing parameters, and a short transition process time) can be obtained. Based on the fuzzy control method, a transient aerodynamic heating simulation control system for missiles was established. It was demonstrated that quick dynamic control of the aerodynamic simulation heating process according to the transient and continual change in heat flow on the surface of high-speed aircrafts can be completed by using this control system.

Analysis and Simulation of Altimeter Performance for the Production of Ice Sheet Topographic Maps

1986 ◽  
Vol 8 ◽  
pp. 141-145 ◽  
Author(s):  
K.C. Partington ◽  
C.G. Rapley
Keyword(s):  
High Precision ◽  
Systems Analysis ◽  
Ice Sheets ◽  
Ice Sheet ◽  
Data Interpretation ◽  
Topographic Maps ◽  
Error Signal ◽  
Tracking Systems ◽  
Tracking Mode ◽  
Non Linear

Satellite-borne, radar altimeters have already demonstrated an ability to produce high-precision, topographic maps of the ice sheets. Seasat operated in a tracking mode, designed for use over oceans, but successfully tracked much of the flatter regions of the ice sheet to ± 72° latitude. ERS-1 will extend coverage to ± 82° latitude and will be equipped with an ocean mode similar to that of Seasat and an ice mode designed to permit tracking of the steeper, peripheral regions. The ocean mode will be used over the flatter regions, because of its greater precision.Altimeter performance over the ice sheets has been investigated through a study of Seasat tracking behaviour and the use of an altimeter performance simulator, with a view to assessing the likely performance of ERS-1 and the design of improved tracking systems. Analysis of Seasat data shows that lock was frequently lost, as a result of possessing a non-linear height error signal over the width of the range window. Having lost lock, the tracker frequently failed to transfer rapidly and effectively to track mode. Use of the altimeter performance simulator confirms many of the findings from Seasat data and it is being used to facilitate data interpretation and mapping, through the modelling of waveform sequence.

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