scholarly journals Study of Method of Denoising for Triaxial Flight Simulation Turntable Based on Generalized Minimum Variance

2011 ◽  
Vol 2-3 ◽  
pp. 156-161
Author(s):  
Yun Lin Luo ◽  
Hong Qiang Sun
Keyword(s):  
Minimum Variance ◽  
Flight Simulation ◽  
Measured Signal ◽  
Random Disturbance ◽  
Test Results ◽  
Control Effect ◽  
Minimum Variance Control ◽  
Test Study ◽  
Low Pass ◽  
Control Accuracy

Aiming at dealing with the existing noise of triaxial flight simulation turntable, the paper design digital filter low-pass transmitters and generalized minimum variance control filter to process signal for random disturbance, and have test study based on outside box control system of triaxial flight simulation turntable. The test results show that we can get better control effect by adopting generalized minimum variance control rates to denoise for measured signal on triaxial flight simulation turntable, and that is much helpful to improve the noise control accuracy.

scholarly journals Stochastic Control for DC–DC Power Converters: A Generalized Minimum Variance Control Approach

2020 ◽  
Vol 53 (2) ◽  
pp. 13410-13417
Author(s):  
Kevin E. Lucas ◽  
Daniel J. Pagano ◽  
Douglas A. Plaza ◽  
David Alejandro Vaca—Benavides ◽  
Sara J. Ríos
Keyword(s):  
Stochastic Control ◽  
Power Converters ◽  
Minimum Variance ◽  
Control Approach ◽  
Minimum Variance Control ◽  
Dc Power

scholarly journals Physical Modeling of the Controlled Water-Flowing Fracture Development during Short-Wall Block Backfill Mining

Lithosphere ◽  
2021 ◽  
Vol 2021 (Special 4) ◽  
Author(s):  
Yun Zhang ◽  
Yongzi Liu ◽  
Xingping Lai ◽  
Jianming Gao
Keyword(s):  
Coal Pillar ◽  
Similarity Criterion ◽  
Test Results ◽  
Control Effect ◽  
Physical Similarity ◽  
Wall Block ◽  
Fracture Development ◽  
Backfill Mining ◽  
Backfill Materials ◽  
Overlying Strata

Abstract Short-wall block backfill mining (SBBM) technology is an effective method to solve the environmental problems in the mining process. Based on the technical characteristics of SBBM technology and the physical similarity criterion, the physical similarity models for comparing the control effects of water-flowing fracture (WFF) development using short-wall block cave mining (SBCM) and SBBM were established, and the deformation and the WFF development of overlying strata above gob were monitored. The test results determined that the composite materials of 5 mm thick pearl sponge+5 mm thick sponge+10 mm thick paper+6 mm thick board were adopted as the similar backfill materials by comparing the stress-strain curves between the similar backfill materials and the original gangue sample. When the backfilling body was filled into the gob, it would be the permanent bearing body, which bore the load of the overlying strata accompanied with the protective coal pillar. At the same time, the backfilling body also filled the collapse space of overlying strata, which was equivalent to reduce the mining height, and effectively reduced the subsidence and failure height of the overlying strata. Compared with SBCM, the test results showed that the maximum vertical deformation, the height of water-flowing fractured zone, and activity range of overlying strata using SBBM were reduced by 91.4%, 82.5%, and 64.9%, respectively. SBBM had a significant control effect on strata damage and WFF development, which could realize the purpose of water resource protection in coal mines.

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