Kinetic, transport, and deactivation rate interactions on steady state and transient responses in heterogeneous catalysis

AIChE Journal ◽  
1978 ◽  
Vol 24 (2) ◽  
pp. 212-222 ◽  
Author(s):  
J. W. Lee ◽  
J. B. Butt ◽  
D. M. Downing
Keyword(s):  
Steady State ◽  
Heterogeneous Catalysis ◽  
Transient Responses ◽  
Deactivation Rate

Utilizing an Adaptive Controller (Azadi Controller) for Trajectory Planning of PUMA 560 Robot

2011 ◽  
Vol 403-408 ◽  
pp. 4880-4887
Author(s):  
Sassan Azadi
Keyword(s):  
Steady State ◽  
Trajectory Planning ◽  
Positive Feedback ◽  
Fuzzy Controller ◽  
Research Work ◽  
Adaptive Controller ◽  
The Novel ◽  
Transient Responses ◽  
Simulation Results ◽  
Good Substitute

This research work was devoted to present a novel adaptive controller which uses two negative stable feedbacks with a positive unstable positive feedback. The positive feedback causes the plant to do the break, therefore reaching the desired trajectory with tiny overshoots. However, the two other negative feedback gains controls the plant in two other sides of positive feedback, making the system to be stable, and controlling the steady-state, and transient responses. This controller was performed for PUMA-560 trajectory planning, and a comparison was made with a fuzzy controller. The fuzzy controller parameters were obtained according to the PSO technique. The simulation results shows that the novel adaptive controller, having just three parameters, can perform well, and can be a good substitute for many other controllers for complex systems such as robotic path planning.

Saturation of Metastable-Defect Density in a-Si:H

1990 ◽  
Vol 192 ◽  
Author(s):  
David Redfield ◽  
Richard H. Bube
Keyword(s):  
Steady State ◽  
Defect Density ◽  
Atomic Model ◽  
Transient Responses ◽  
Induced Defects ◽  
Metastable Defect

ABSTRACTThe existence of saturation (or steady state) in the density of light-induced defects in amorphous Si:H is shown to have major importance for the interpretation of the nature and origin of these defects. First, a number of characteristics of the steady-state and transient responses to light and temperature are described and contrasted. These lead to the conclusion that the saturation value is the only useful criterion of the number of defects in these materials. We then describe a new atomic model for defects, unifying both dopant-induced and light-induced defects. This model invokes foreign atoms in defects, and saturation reflects the limitation imposed by the numbers of such atoms. Many other observed properties of defects are explained by this model.

Vehicle-Follower Longitudinal Control for Automated Transit Vehicles

1977 ◽  
Vol 99 (4) ◽  
pp. 241-248 ◽  
Author(s):  
R. J. Caudill ◽  
W. L. Garrard
Keyword(s):  
Steady State ◽  
Function Technique ◽  
Steady State Response ◽  
Describing Function ◽  
Transient Responses ◽  
Longitudinal Control ◽  
Transit Systems ◽  
State Response ◽  
Acceleration And Deceleration ◽  
And Control

This paper examines the effects of spacing policy and control system nonlinearities on the dynamic response of strings of automated transit vehicles operating under automatic velocity and spacing control. Both steady-state and transient responses are studied. Steady-state response is examined by a modification of the describing function technique and transient response is studied by Liapunov procedures. It is shown that a nonlinearity commonly encountered in automated transit vehicles, a limiter on acceleration and deceleration, can result in string instabilities even though a linearized analysis indicates that the string is stable. Although this paper is specifically focused on automated transit systems, some of the results obtained also appear to be applicable to strings of automobiles on freeways.

Heterogeneous catalysis at line defects II. Simple reactions

1972 ◽  
Vol 331 (1585) ◽  
pp. 195-202
Keyword(s):  
Steady State ◽  
Heterogeneous Catalysis ◽  
Catalytic Mechanism ◽  
Simple Boundary ◽  
Domain Boundaries ◽  
Adsorbed Layers ◽  
Line Defects

The ability of domain boundaries in adsorbed layers to act as effective catalysts is described. Some simple boundary-controlled reactions are analysed. Steady-state catalysis is discussed briefly in the context of catalytic mechanism.

scholarly journals Steady-state and transient responses of a flexible eccentric spinning shaft

2018 ◽  
Vol 46 (1) ◽  
pp. 133-137 ◽  
Author(s):  
Sovan Dasgupta ◽  
John Rajan
Keyword(s):  
Steady State ◽  
Transient Responses ◽  
Spinning Shaft

Fuzzy Gain Scheduling of PI Plus Derivative Controller to Improve the Transient Response of Boost DC/DC Converter

2015 ◽  
Vol 781 ◽  
pp. 414-417
Author(s):  
Yutthana Kanthaphayao ◽  
Chalermpol Reaungepattanawiwat
Keyword(s):  
Control System ◽  
Steady State ◽  
Transient Response ◽  
Output Voltage ◽  
Input Voltage ◽  
Gain Scheduling ◽  
Voltage Regulation ◽  
Control Technique ◽  
Transient Responses ◽  
System Operation

This paper illustrates a fuzzy gain scheduling of PI plus derivative controller. The proposed control technique improves the transient response of a DC/DC converter. The proposed control system is easy to implement based on an STM32F4 microcontroller. The performance evaluation was done by an experiment through a boost DC/DC converter, with a 24W load, a 12V input voltage, and a 24V output voltage, respectively. The system operation achieves tight output voltage regulation, both for the steady-state and transient responses.

ON THE DIFFRACTION OF ELECTROMAGNETIC PULSES BY CURVED CONDUCTING SURFACES

1959 ◽  
Vol 37 (12) ◽  
pp. 1384-1396 ◽  
Author(s):  
James R. Wait ◽  
Alyce M. Conda
Keyword(s):  
Steady State ◽  
Incident Wave ◽  
Convex Surface ◽  
Step Function ◽  
Transient Responses ◽  
Laplace Inversion ◽  
Electromagnetic Pulses ◽  
Steady State Solutions

Starting with the known steady-state solutions for diffraction by a perfectly conducting convex surface, the corresponding transient responses are derived using Fourier–Laplace inversion. Explicit results are given for an incident wave which varies with time as a step function.

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