scholarly journals Dynamic Compensation of Piezoresistive Pressure Sensor Based on Sparse Domain

2020 ◽  
Vol 2020 ◽  
pp. 1-8
Author(s):  
Bo Xu ◽  
Tailin Han ◽  
Hong Liu ◽  
Xiao Wang ◽  
Mingchi Ju
Keyword(s):  
Shock Wave ◽  
Shock Tube ◽  
Test Data ◽  
Pressure Sensor ◽  
Pressure Sensors ◽  
The United States ◽  
Positive Pressure ◽  
Dynamic Compensation ◽  
Tube Test ◽  
Shock Tube Test

In the process of transient test, due to the insufficient bandwidth of the pressure sensor, the test data is inaccurate. Firstly, based on the projection of the shock tube test signal in the sparse domain, the feature expression of the signal sample is obtained. Secondly, the problem of insufficient bandwidth is solved by inverse modeling of sensor dynamic compensation system based on swarm intelligence algorithm. In this paper, the method is used to compensate the shock tube test signals of the 85XX series pressure sensors made by the Endevco company of the United States, the working bandwidth of the sensor is widened obviously, the rise time of the pressure signal can be compensated to 12.5 μs, and the overshoot can be reduced to 8.96%. The repeatability of dynamic compensation is verified for the actual gun muzzle shock wave test data, the results show that the dynamic compensation can effectively recover the important indexes such as overpressure peak value and positive pressure action time, and the original shock wave signal is recovered from the high resonance data.

Influence of turbulent boundary layer on shock tube test time

AIAA Journal ◽  
1965 ◽  
Vol 3 (5) ◽  
pp. 960-961
Author(s):  
PETER JEANMAIRE ◽  
ERIC F. BROCKER
Keyword(s):  
Boundary Layer ◽  
Turbulent Boundary Layer ◽  
Shock Tube ◽  
Test Time ◽  
Tube Test ◽  
Shock Tube Test

Moving computational multi-domain method for modelling the flow interaction of multiple moving objects

2021 ◽  
Author(s):  
Momoha Nishimura ◽  
Masashi Yamakawa ◽  
Shinichi Asao ◽  
Seiichi Takeuchi ◽  
Mehdi Badri Ghomizad
Keyword(s):  
Flow Field ◽  
Shock Tube ◽  
Short Distance ◽  
Moving Objects ◽  
Computational Domain ◽  
Validation Test ◽  
Tube Test ◽  
Flow Interaction ◽  
Shock Tube Test ◽  
Object Move

Abstract This study proposes a method where the flow field variables are communicated between multiple separate moving computational domains and simulates the flow interaction of multiple moving objects. Instead of using the conventional approach with a single fixed computational domain covering the whole flow field, this method advances the moving computational domain (MCD) method in which the computational domain itself moves in line with the motions of an object inside. The computational domains created around each object move independently, and the flow fields of each domain interact where the flows cross. This eliminates the spatial restriction for simulating multiple moving objects. After the results of the shock tube test verify that the interpolation has been achieved between grids, a validation test is conducted in which two spheres are crossed, and the forces exerted on one object due to the other’s crossing at a short distance are calculated. The results verify the reliability of this method and show that it is applicable to the flow interaction of multiple moving objects.

The influence of boundary layer growth on shock tube test times

1968 ◽  
Vol 18 (1) ◽  
pp. 116-155 ◽  
Author(s):  
P. J. Musgrove ◽  
J. P. Appleton
Keyword(s):  
Boundary Layer ◽  
Shock Tube ◽  
Layer Growth ◽  
Tube Test ◽  
Shock Tube Test ◽  
Boundary Layer Growth

Effect of wall heat transfer on shock-tube test temperature at long times

Shock Waves ◽  
2010 ◽  
Vol 21 (1) ◽  
pp. 1-17 ◽  
Author(s):  
C. Frazier ◽  
M. Lamnaouer ◽  
E. Divo ◽  
A. Kassab ◽  
E. Petersen
Keyword(s):  
Heat Transfer ◽  
Shock Tube ◽  
Test Temperature ◽  
Wall Heat Transfer ◽  
Tube Test ◽  
Shock Tube Test

scholarly journals Research on the Dynamic Compensation Method of the Shock Wave's Evaluation Pressure Sensor

2020 ◽  
Author(s):  
Wei Wang
Keyword(s):  
Shock Wave ◽  
Dynamic Characteristic ◽  
Pressure Sensor ◽  
Filter Design ◽  
Design Method ◽  
Dynamic Error ◽  
Measurement Range ◽  
Test System ◽  
Dynamic Compensation ◽  
Lower Natural Frequency

Abstract Due to the steep and changing fast rising edge of explosion shock wave signal, it asks for good dynamic characteristic of sensor and test system. As far as the development of the sensor level, they are difficult to achieve dynamic characteristic requirement of approximate distortionless transmission, so cause a large dynamic error in the actual test. This paper, aiming at providing theoretical support for technology guarantee and service of the shock wave testing system of national shooting range, conducts a research on the method of dynamic characteristic compensation of pressure sensor facing the power evaluation of the blast shock wave. The research proposes and studies the filter design method of dynamic compensation of pressure sensor based on PFQPSO (the progressive function quantum-behaved particle swarm optimization) algorithm, which belongs to inverse modeling. The dynamic compensation can be realized without knowing the model of sensor, so the extra error caused by dynamic modeling of sensors can be avoided. using 8510 series sensor can be used with lower natural frequency and lower measurement range from Endevco Company, this research has had experiment and modeling on the dynamic characteristics of shock tubes as well as design of dynamic compensation filter. Based on the analysis and confirmation, this study illustrates the possibility and effectiveness of this method.

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