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Variable-structure coherent systems†
International Journal of General Systems, 2005The notion of coherent systems plays an essential role in conventional reliability theory. A system is said to be coherent if all of its components are relevant and the system reliability is improved as the component reliabilities are improved. However, in many complex systems or networks, not all the components are unconditionally relevant.
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Variable Structure Control of Systems with Sandwiched Backlash
Proceedings of the 2005 IEEE International Symposium on, Mediterrean Conference on Control and Automation Intelligent Control, 2005., 2005This paper proposes a novel approach for the stabilization problem of a sandwich nonlinear system with a backlash nonlinearity between two dynamic blocks. To this purpose a robust sliding mode controller has been designed ensuring the convergence of the system trajectories in a neighborhood of the origin of arbitrary width (independently of the ...
PARLANGELI, GIANFRANCO +1 more
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Variable structure modelling of dynamic industry systems
Journal of the Operational Research Society, 2000Summary: This paper argues for and develops a variable structure modelling methodology, that is one which treats individual players in an industry as agents and provides the means for agent entry and exit as well as evolution of their behaviour. The resulting simulation framework extends traditional industry dynamics approaches and object oriented ...
K. Christodoulou, K. Vlahos
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On the synthesis of variable structure observers for LPV systems
2017 IEEE 56th Annual Conference on Decision and Control (CDC), 2017In this paper, an analysis and synthesis framework for a class of robust variable structure observers for linear parameter varying (LPV) systems is proposed. Instead of satisfying passivity-like conditions, the variable structure observer is created by ensuring a small gain condition is satisfied, formulated via loop transformations. The transformation
Lejun Chen +2 more
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Scaling Of Structural And Functional Variables In The Respiratory System
Annual Review of Physiology, 1987Dependencies in the Respiratory System In his companion review C. R. Taylor (38) concludes that the capacity for oxidative metabolism in the mitochondria sets the limit for energy supply to muscles. Consequently, to supply O2 to the mitochondria at the rate required by oxidative phosphorylation is a critical process that involves the entire respiratory
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Adaptive variable structure control of nonlinear systems
1999 European Control Conference (ECC), 1999Variable Structure Control(VSC) with sliding mode is a special type of control technique that is capable of making a control system very robust with respect to system parameter variations and external disturbances. The chattering of the VSC signal can be reduced by several methods.
F. M. Al-Simni, S. K. Mukarram
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VARIABLE STRUCTURE CONTROLLERS IN MOTION CONTROL SYSTEMS
IFAC Proceedings Volumes, 1992Abstract The VSS approach to motion control system design is presented in this paper. The selection of the sliding mode manifolds, the synthesis of the control inputs and the sliding mode manifolds estimation are discussed. The switching pattern, for switching converter operation is determined from the sliding mode existence conditions.
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The invariance conditions in variable structure systems
Automatica, 1969The paper discusses the possibility of lowering a system sensitivity by the application of a sliding mode. The sliding mode can be obtained by means of control functions which on certain hypersurfaces have first order discontinuities in a state space. Such functions can be realized with comparatively simple elements.
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Hyperstability in variable structure systems
1980 19th IEEE Conference on Decision and Control including the Symposium on Adaptive Processes, 1980Reaching and existence conditions for variable structure systems are considered using hyperstability theory. A new sufficient condition for linear, time invariant systems is derived, and an example is given to illustrate how the condition is more relaxed than the sufficient condition presently used for such systems.
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Sensitivity of automatic control systems with variable structure
IFAC Proceedings Volumes, 1964Publisher Summary This chapter discusses the sensitivity of automatic control systems with variable structure. It describes the task of synthesizing control systems for linear plants with variable parameters satisfying specified performance criteria. As one of the indices of dynamic properties of the system, the settling time is considered.
B.N. Petrov +3 more
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