Active Control of Three-Dimensional Structures

This paper deals with the control of a cancerous tumour growth. The model used is a Three-Dimensional Cancer Model (TDCM). The competition terms include tumour cells, healthy cells, and immune cells. Nature of the competition among the populations of tumour cells, healthy host cells, and immune cells results in a chaotic behaviour. In this paper, a nonlinear active control has been used to control the growth of a tumour. Effect of chemotherapy drug on the different cell populations has been studied. Our control objective is to control the tumour growth and minimize its population to a small value which can be considered as harmless.Along with the above objective, the normal cell population is also be maintained at a particular level. This work has been done completely inin-sillico environment. The simulation results are shown extensively to support the theoretical analysis and confirmed that the preliminary objectives of the paper are attained.

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Three dimensional solution of pneumatic active control of forebody vortex asymmetry

10.2514/6.1995-101 ◽

1995 ◽

Author(s):

Osama Kandil ◽

Hazem Shara ◽

C Liu

Keyword(s):

Active Control ◽

Three Dimensional ◽

Dimensional Solution

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Synchronization and Electronic Circuit Application of Hidden Hyperchaos in a Four-Dimensional Self-Exciting Homopolar Disc Dynamo without Equilibria

Complexity ◽

10.1155/2017/7101927 ◽

2017 ◽

Vol 2017 ◽

pp. 1-11 ◽

Cited By ~ 7

Author(s):

Yu Feng ◽

Zhouchao Wei ◽

Uğur Erkin Kocamaz ◽

Akif Akgül ◽

Irene Moroz

Keyword(s):

Sliding Mode Control ◽

Active Control ◽

Electronic Circuit ◽

Sliding Mode ◽

Control Variable ◽

Three Dimensional ◽

Hyperchaotic System ◽

Synchronization Errors ◽

Mode Control ◽

Additional Control

We introduce and investigate a four-dimensional hidden hyperchaotic system without equilibria, which is obtained by augmenting the three-dimensional self-exciting homopolar disc dynamo due to Moffatt with an additional control variable. Synchronization of two such coupled disc dynamo models is investigated by active control and sliding mode control methods. Numerical integrations show that sliding mode control provides a better synchronization in time but causes chattering. The solution is obtained by switching to active control when the synchronization errors become very small. In addition, the electronic circuit of the four-dimensional hyperchaotic system has been realized in ORCAD-PSpice and on the oscilloscope by amplitude values, verifying the results from the numerical experiments.

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Three-dimensional active control for lightweight isolation table with consideration of vibration of addition structure

The Proceedings of the Symposium on the Motion and Vibration Control ◽

10.1299/jsmemovic.2003.8.313 ◽

2003 ◽

Vol 2003.8 (0) ◽

pp. 313-318

Author(s):

Masahiro NISHI ◽

Takashi SHONO ◽

Masahiko NARUKE ◽

Toru WATANABE ◽

Kazuto SETO

Keyword(s):

Active Control ◽

Three Dimensional

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Active Control of Elastic and Rigid Body Response of a Three Dimensional Underwater Structure

Journal of Offshore Mechanics and Arctic Engineering ◽

10.1115/1.2826988 ◽

1995 ◽

Vol 117 (1) ◽

pp. 30-37 ◽

Cited By ~ 3

Author(s):

H. Suzuki ◽

K. Yoshida ◽

K. Watanabe

Keyword(s):

Numerical Model ◽

Rigid Body ◽

Active Control ◽

Structural Model ◽

Scale Up ◽

Three Dimensional ◽

Basic Research ◽

Weather Conditions ◽

Body Motion ◽

Elastic Response

One key technology for the offshore development of the increasing water depth will be remotely operated installation and construction of flexible structure in the deep water or on the seabed. The flexibility comes from scale-up or weight reduction of the structure. Conventional operation from the sea surface is affected by the weather conditions, and, therefore, not so efficient. This paper presents basic research on active control of elastic response and rigid body motion of an underwater elastic structure toward the remotely operated installation technique. The numerical model of the dynamics of the structural model is formulated, and based on the numerical model the control is formulated. The formulated control is tested by computer simulations and model experiments. The structural model is propelled by thrusters and taken from initial position to another position, while the elastic responses are controlled by variable buoyancy-type actuators.

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