scholarly journals Robust Genetic Circuit Design: A Mixed H∞ and IQC Analysis

2017 ◽  
Vol 2017 ◽  
pp. 1-6
Author(s):  
Ruijuan Chen ◽  
Wei Pan ◽  
Dongfei Fu ◽  
Xin He
Keyword(s):  
Circuit Design ◽  
Design Procedure ◽  
External Noise ◽  
Genetic Regulatory Network ◽  
Genetic Circuit ◽  
Quadratic Constraints ◽  
Integral Quadratic Constraints ◽  
Hill Coefficients ◽  
The Stability ◽  
Robust To Noise

This paper considers the problem of designing a genetic circuit which is robust to noise effect. To achieve this goal, a mixed H∞ and Integral Quadratic Constraints (IQC) approach is proposed. In order to minimize the effects of external noise on the genetic regulatory network in terms of H∞ norm, a design procedure of Hill coefficients in the promoters is presented. The IQC approach is introduced to analyze and guarantee the stability of the designed circuit.

scholarly journals Finite horizon robustness analysis of LTV systems using integral quadratic constraints

Automatica ◽  
2019 ◽  
Vol 100 ◽  
pp. 135-143 ◽  
Author(s):  
Peter Seiler ◽  
Robert M. Moore ◽  
Chris Meissen ◽  
Murat Arcak ◽  
Andrew Packard
Keyword(s):  
Robustness Analysis ◽  
Finite Horizon ◽  
Quadratic Constraints ◽  
Integral Quadratic Constraints

Structural Stability Evaluation for Lifting Lug Design of Large Marine Engine by Finite Element Analysis

2007 ◽  
Vol 353-358 ◽  
pp. 2855-2859
Author(s):  
W.C. Lee ◽  
Chae Sil Kim ◽  
J.B. Na ◽  
D.H. Lee ◽  
S.Y. Cho ◽  
...  
Keyword(s):  
Finite Element ◽  
Three Dimensional ◽  
Design Procedure ◽  
Steel Structures ◽  
Stability Evaluation ◽  
Element Analysis ◽  
Marine Engines ◽  
Dimensional Finite Element ◽  
The Stability ◽  
Three Dimensional Finite Element

Since most marine engines are generally very huge and heavy, it is required to keep safety from accidents in dealing them. Several types of lifting lugs have been used to assemble hundred ton–large steel structures and carry the assembled engines. Recently a few crashes have been occurred in carrying engines due to breaking down the lugs. Although the stability evaluation of the lifting lug has therefore been very important for safety, systematic design procedure of the lugs, which includes the structural analysis considering stability, has few reported. This paper describes the three dimensional finite element structural modeling for a lifting lug, the studies for determining the reasonable loading and boundary conditions, and the stability evaluation with the results of structural analyses. It should be very helpful for designing the other types of lifting lugs with safety.

Design of a Force Feedback Chatter Control System

1972 ◽  
Vol 94 (1) ◽  
pp. 5-10 ◽  
Author(s):  
C. Nachtigal
Keyword(s):  
Machine Tool ◽  
Frequency Domain ◽  
Transient Response ◽  
Force Feedback ◽  
Design Procedure ◽  
Experimental Tests ◽  
Work Piece ◽  
Regenerative Chatter ◽  
Chatter Control ◽  
The Stability

The analysis of machine tool chatter from frequency domain considerations is generally accepted as a valid representation of the regenerative chatter phenomenon. However, active control of regenerative chatter is still in its embryonic stage. It was established in reference [2] that a measurement of the cutting force could be effectively used in conjunction with a controller and a tool position servo system to increase the stability of an engine lathe and to improve its transient response. This paper presents the design basis for such a system, including both analytical and experimental considerations. The design procedure stems from a real part stability criterion based on the work by Merritt [1]. Because of the unknown variability in the dynamics of a machine tool system, the controller parameters were chosen to accomodate some mismatch between structure and tool servo dynamics. Experimental tests to determine the stability zone of the controlled machine tool system qualitatively confirmed the analytical design results. The experimental results were consistent in that the transient response tests confirmed the frequency domain stability tests. It was also demonstrated experimentally that the equivalent static stiffness of a flexible work-piece system could be substantially increased.

scholarly journals Author Correction: Genetic circuit design automation for the gut resident species Bacteroides thetaiotaomicron

2020 ◽  
Vol 38 (8) ◽  
pp. 1001-1001
Author(s):  
Mao Taketani ◽  
Jianbo Zhang ◽  
Shuyi Zhang ◽  
Alexander J. Triassi ◽  
Yu-Ja Huang ◽  
...  
Keyword(s):  
Circuit Design ◽  
Design Automation ◽  
Genetic Circuit ◽  
Resident Species ◽  
Bacteroides Thetaiotaomicron
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