Journal ArticleDOI
Vibrational control of an exothermic reaction in a CSTR: Theory and experiments
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TLDR
In this article, the authors introduce oscillations forcees introduced dans des debits d'entree d'un reacteur continu agite exothermique, provoquent une modification de la courbe en S de regime permanent.Abstract:
Des oscillations forcees introduites dans des debits d'entree d'un reacteur continu agite exothermique, provoquent une modification de la courbe en S de regime permanent. Cette modification rend possible d'operer a un regime asymptotiquement stable localise au voisinage d'un regime permanent instable du reacteur aux debits d'entree stationnaires. Ainsi, des vibrations dans les debits d'entree peuvent etre considerees comme un mecanisme stabilisant ce type de reacteurread more
Citations
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Journal ArticleDOI
Vibrational control of nonlinear time lag systems with bounded delay: averaging theory, stabilizability, and transient behavior
TL;DR: The theory of vibrational control of nonlinear time lag systems with arbitrarily large but bounded delay with conditions which ensure the existence of parametric vibrations that stabilize nonlineartime lag systems is developed.
Journal ArticleDOI
Complexity, bifurcation and chaos in natural and man-made lumped and distributed systems
TL;DR: This paper concentrates on its chemical/biological engineering relevance, especially for reaction/diffusion and hydrodynamic processes, and restricts its attention to systems that do not change their structure during the process, so that self-organizational criticality is explained, but not utilized.
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Digital simulation of industrial fluid catalytic cracking units—IV. Dynamic behaviour
TL;DR: In this paper, a relatively rigorous dynamic model is developed for industrial type IV FCC units and is used to investigate the dynamic characteristics of a typical industrial Type IV FCC unit, which covers: numerical difficulties associated with the digital dynamic simulation of this system, extreme sensitivity of the dynamics to initial catalyst activity in the reactor, effect of model dimensionality on the reliability of the model predictions, the behaviour of the system with switching control around the middle unstable steady state as well as the closed-loop system with simple feedback proportional control.
Journal ArticleDOI
A numerical-method for determining optimal parameter values in forced periodic operation
TL;DR: A numerical approach for determining values of forcing parameters which maximize performance of a periodically forced system is described, using the model of a continous stirred-tank rector (CSTR) to solve the optimization problem.
Journal ArticleDOI
Forced oscillations of chemical reactors with multiple steady states
TL;DR: In this article, the responses of nolinear reaction models to periodic forcing in parameter regions of steady-state multiplicity have been examined and a strong correlation between the size of the period doubling ovals of the forced system and the degree of focal, as opposed to nodal, transient behavior inherent in the unforced system was found.