Variable structure control of switched systems based on Lyapunov-Metzler-SPR systems

This paper presents two Variable Structure Controllers (VSC) for continuous-time switched plants. It is assumed that the state vector is available for feedback. The proposed control system provides a switching rule and also the variable structure control input. The design is based on Lyapunov-Metzler (LM) inequalities and also on Strictly Positive Real (SPR) systems stability results. The definition of Lyapunov-Metzler-SPR (LMS) systems and its direct application in the design of VSC for switched systems are introduced in this paper. Two examples illustrate the design of the proposed VSC, considering a plant given by a switched system with a switched-state control law and two linear time-invariant systems, that are not controllable and also can not be stabilized with state feedback. ©2008 IEEE.

A territorial perspective: towards the consolidation of human settlements in Latin America and the Caribbean

Includes bibliography

Sustainable development: changing production patterns, social equity and the environment

Includes bibliography

Foreign investment in Mexico after economic reform

Includes bibliography

Tax structure and tax evasion in Latin America

Incluye bibliografia

Political violence and economic development in Latin America: issues and evidence

Includes bibliography

Urban poverty and habitat precariousness in the Caribbean

Includes bibliography

Implementation of a DC-DC converter with variable structure control of switched systems

This paper presents a control method for a class of continuous-time switched systems, using state feedback variable structure controllers. The method is applied to the control of a two-cell dc-dc buck converter and a control circuit design using the software PSpice is proposed. The design is based on Lyapunov-Metzler-SPR systems and the performance of the resulting control system is superior to that afforded by a recently-proposed alternative sliding-mode control technique. The dc-dc power converters are very used in industrial applications, for instance, in power systems of hybrid electric vehicles and aircrafts. Good results were obtained and the proposed design is also inexpensive because it uses electric components that can be easily found for the hardware implementation. Future researches on the subject include the hardware validation of the dc-dc converter controller and the robust control design of switched systems, with structural failures. © 2011 IEEE.

Indigenous peoples and urban settlements: spatial distribution, internal migration and living conditions

Includes bibliography

Economic growth and performance in Latin America

Includes bibliography

Spatial and seasonal patterns in fish assemblage in Córrego Rico, upper Paraná river Basin

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Socioeconomic structure and colective behaviour

Includes bibliography

Panama and Central American economic integration

Includes bibliography

Economic policy, institutions and productive development in Latin America

Includes bibliography

Industrial competitiveness in Brazil ten years after economic liberalization

Includes bibliography