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15
Dither in Systems with Hysteresis
, 1995
"... : This paper deals with differential inclusion containing an hysteresis nonlinearity and two inputs: a control input and a dither input of high frequency. Conditions are introduced under which its solution admits asymptotic behavior when the dither frequency goes to infinity. According to asymptotic ..."
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to asymptotic growth of the dither amplitude, two different behaviors appear: the nonlinearity is smoothed (resp. quenched) if the velocities induced by the dither are asymptotically bounded (resp. unbounded). Convergence results for finite and infinite time intervals are given, and linked with the averaging
Slidegate Dithering Effects on Transient Flow and Mold Level Fluctuations
"... The effects of slide-gate dithering on surface flow behavior during continuous casting are investigated via mathematical modeling and plant trial measurements. A transient turbulent flow model with a new free surface tracking algorithm using a dynamic mesh was developed, validated, and applied to ma ..."
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Cited by 1 (1 self)
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to match different measured level-fluctuation histories. Simulation results explain the mechanism of large sloshing observed in a dithering trial when the dithering frequency matches the mold natural frequency. The associated flow-rate variations then amplify the velocity variations in the circulating
EFFECT OF TANGENTIAL DITHER SIGNAL ON FRICTION INDUCED OSCILLATIONS IN THE SDOF MODEL
"... This work examines how friction-induced oscillations are affected by high-frequency excitations, commonly referred to as dither signals. The traditional mass-on-moving-belt system is studied using two different friction models, both exhibiting a negative friction coefficient-velocity relationship. T ..."
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This work examines how friction-induced oscillations are affected by high-frequency excitations, commonly referred to as dither signals. The traditional mass-on-moving-belt system is studied using two different friction models, both exhibiting a negative friction coefficient-velocity relationship
Transient Turbulent Flow Simulation with Water Model Validation and Application to Slide Gate Dithering
"... Slide gate dithering can reduce nozzle clogging and sticking during continuous casting, but also influences transient flow in the mold and meniscus level fluctuations. In this work, a semi-analytical model was first developed and validated to predict nozzle flow rate from slide-gate opening position ..."
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Cited by 1 (1 self)
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position. A transient CFD model of 3-D turbulent flow was then validated with surface velocity measurements in a water model. Finally, transient two phase flow simulations were performed to investigate nozzle and mold flow pattern variations during gate dithering, with Upper Tundish Nozzle (UTN) hot argon
The Effect of Velocity Aberration on ACS Image Processing
"... Abstract. The apparent scale change due to velocity aberration, although small, has measurable effects on the wide field images of the ACS.Over a one orbit period the scale can vary by as much as 5 parts in 100,000.Across a long diagonal of the ACS field of view this amounts to about 0.3 pixels. Thi ..."
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Abstract. The apparent scale change due to velocity aberration, although small, has measurable effects on the wide field images of the ACS.Over a one orbit period the scale can vary by as much as 5 parts in 100,000.Across a long diagonal of the ACS field of view this amounts to about 0.3 pixels
unknown title
"... Figure 6a clearly shows the strong signal which the correlation algorithm computes to identify the region where the commanded and reference velocities differ. Figure 6b shows how the reference velocity closely tracks the commanded velocity when the force feedback is negligible (Figure 6c). Note that ..."
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that after the connector disengages, the guarded move SMP interprets the movement as a loss of contact and terminates the downward offset velocity. Thus, no contact forces are generated for the last half of the dithering in this example.
unknown title
"... Figure 6a clearly shows the strong signal which the correlation algorithm computes to identify the region where the commanded and reference velocities differ. Figure 6b shows how the reference velocity closely tracks the commanded velocity when the force feedback is negligible (Figure 6c). Note that ..."
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that after the connector disengages, the guarded move SMP interprets the movement as a loss of contact and terminates the downward offset velocity. Thus, no contact forces are generated for the last half of the dithering in this example.
Published In
, 1995
"... Figure 6a clearly shows the strong signal which the corre-lation algorithm computes to identify the region where the commanded and reference velocities differ. Figure 6b shows how the reference velocity closely tracks the com-manded velocity when the force feedback is negligible (Figure 6c). Note th ..."
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that after the connector disengages, the guarded move SMP interprets the movement as a loss of contact and terminates the downward offset velocity. Thus, no contact forces are generated for the last half of the dith-ering in this example. 6
Myo Thant Sin Aung Friction Compensation of Geared Actuators With High Presliding Stiffness
"... Most of existing friction compensation techniques are based on friction models that uses the velocity as its input. These methods are difficult to apply to inexpensive encoderbased actuator systems that do not exhibit sufficiently large presliding displacement. This paper presents a new method of f ..."
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Most of existing friction compensation techniques are based on friction models that uses the velocity as its input. These methods are difficult to apply to inexpensive encoderbased actuator systems that do not exhibit sufficiently large presliding displacement. This paper presents a new method
T.: Frameto-frame coherent halftoning in image space
- In Theory and Practice of Computer Graphics (2004), IEEE
, 2004
"... We present an interactive technique for generating halftoning animations in image space. We specifically consider a halftoning approach that uses screening methods to achieve shading, brightness, and texture by placing varying patterns. Our technique transports the screening patterns in a frame-to-f ..."
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Cited by 4 (0 self)
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-to-frame coherent manner according to the velocity of each fragment on the image plane. We show how the algorithm is mapped to programmable graphics hardware to achieve interactive frame rates. Our approach can be used for any screening-based halftoning technique, and therefore different non-photorealistic image
Results 1 - 10
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