scholarly journals Feedback Control for the Size and Shape Evolution of Needle-like Crystals in Suspension. IV. Modeling and Control of Dissolution

2019 ◽  
Vol 19 (7) ◽  
pp. 4029-4043 ◽  
Author(s):  
Stefan Bötschi ◽  
Ashwin Kumar Rajagopalan ◽  
Manfred Morari ◽  
Marco Mazzotti
Keyword(s):  
Feedback Control ◽  
Shape Evolution ◽  
Modeling And Control ◽  
Size And Shape ◽  
And Control

scholarly journals Feedback Control for the Size and Shape Evolution of Needle-like Crystals in Suspension. I. Concepts and Simulation Studies

2018 ◽  
Vol 18 (8) ◽  
pp. 4470-4483 ◽  
Author(s):  
Stefan Bötschi ◽  
Ashwin Kumar Rajagopalan ◽  
Manfred Morari ◽  
Marco Mazzotti
Keyword(s):  
Feedback Control ◽  
Shape Evolution ◽  
Simulation Studies ◽  
Size And Shape

scholarly journals Feedback Control for the Size and Shape Evolution of Needle-like Crystals in Suspension. II. Cooling Crystallization Experiments

2018 ◽  
Vol 18 (10) ◽  
pp. 6185-6196 ◽  
Author(s):  
Ashwin Kumar Rajagopalan ◽  
Stefan Bötschi ◽  
Manfred Morari ◽  
Marco Mazzotti
Keyword(s):  
Feedback Control ◽  
Shape Evolution ◽  
Size And Shape ◽  
Cooling Crystallization ◽  
Crystallization Experiments

Modeling and Control of a Rotary Crane

1985 ◽  
Vol 107 (3) ◽  
pp. 200-206 ◽  
Author(s):  
Y. Sakawa ◽  
A. Nakazumi
Keyword(s):  
Feedback Control ◽  
Equilibrium State ◽  
Open Loop ◽  
The State ◽  
Control Input ◽  
Loop Control ◽  
Modeling And Control ◽  
Control Scheme ◽  
Rotary Crane ◽  
And Control

In this paper we first derive a dynamical model for the control of a rotary crane, which makes three kinds of motion (rotation, load hoisting, and boom hoisting) simultaneously. The goal is to transfer a load to a desired place in such a way that at the end of transfer the swing of the load decays as quickly as possible. We first apply an open-loop control input to the system such that the state of the system can be transferred to a neighborhood of the equilibrium state. Then we apply a feedback control signal so that the state of the system approaches the equilibrium state as quickly as possible. The results of computer simulation prove that the open-loop plus feedback control scheme works well.

Nonlinear Modeling and Control of Overhead Crane Load Sway

1988 ◽  
Vol 110 (3) ◽  
pp. 266-271 ◽  
Author(s):  
Kamal A. F. Moustafa ◽  
A. M. Ebeid
Keyword(s):  
Control System ◽  
Feedback Control ◽  
Digital Computer ◽  
Nonlinear Modeling ◽  
Overhead Crane ◽  
Nonlinear Dynamical ◽  
Modeling And Control ◽  
Control Scheme ◽  
Rate Of Decay ◽  
And Control

In this paper, we derive a nonlinear dynamical model for an overhead crane. The model takes into account simultaneous travel and transverse motions of the crane. The aim is to transport an object along a specified transport route in such a way that the swing angles are suppressed as quickly as possible. We develop an antiswing control system which adopts a feedback control to specify the crane speed at every moment. The gain matrix is chosen such that a desired rate of decay of the swing angles is obtained. The model and control scheme are simulated on a digital computer and the results prove that the feedback control works well.

scholarly journals Feedback Control for the Size and Shape Evolution of Needle-like Crystals in Suspension. III. Wet Milling

2019 ◽  
Vol 19 (5) ◽  
pp. 2845-2861 ◽  
Author(s):  
Ashwin Kumar Rajagopalan ◽  
Stefan Bötschi ◽  
Manfred Morari ◽  
Marco Mazzotti
Keyword(s):  
Feedback Control ◽  
Shape Evolution ◽  
Wet Milling ◽  
Size And Shape

Punctuated island growth: An approach to examination and control of quantum dot density, size, and shape evolution

1999 ◽  
Vol 75 (1) ◽  
pp. 85-87 ◽  
Author(s):  
I. Mukhametzhanov ◽  
Z. Wei ◽  
R. Heitz ◽  
A. Madhukar
Keyword(s):  
Quantum Dot ◽  
Shape Evolution ◽  
Island Growth ◽  
Size And Shape ◽  
Dot Density ◽  
And Control

Orientation-Regulated Platforms for Use in Biplanar Bicycles

1999 ◽  
Author(s):  
Donald E. Grove ◽  
R. Randall Soper ◽  
Michael Abbott ◽  
Charles F. Reinholtz
Keyword(s):  
Feedback Control ◽  
Vehicle Class ◽  
Modeling And Control ◽  
New Class ◽  
Major Disadvantage ◽  
Active Feedback ◽  
Fixed Orientation ◽  
Active Feedback Control ◽  
Robust Regulation ◽  
And Control

Abstract This work develops an active feedback control law that provides robust regulation for a pendulating platform attached to a new class of land vehicle. The biplanar bicycle is a novel two-wheeled single-axle differentially driven vehicle. The vehicle generates locomotive torques by driving against a reaction mass (comprised of the main chassis, motors, etc.), which is free to rotate. The lack of a fixed-orientation mount for peripheral and excitation-sensitive equipment may be a major disadvantage of this new vehicle class. However, active feedback control using a second reaction or proof mass to stabilize a platform fills this need. Here, the procedure for modeling and control of such a structure is demonstrated through the example of a camera spar for an autonomous biplanar bicycle. The dynamics of the example are developed using Lagrangian techniques. The application of optimal control theory to a linearized approximation of the plant is shown to provide robust regulation, with respect to perturbations and external disturbances, of the fully nonlinear system.

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