LMI-based digital redesign of linear time-invariant systems with state-derivative feedback
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Data
2009-12-01
Autores
Cardim, Rodrigo [UNESP]
Teixeira, Marcelo C. M. [UNESP]
Faria, Flávio A. [UNESP]
Assunção, Edvaldo [UNESP]
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Resumo
A simple method for designing a digital state-derivative feedback gain and a feedforward gain such that the control law is equivalent to a known and adequate state feedback and feedforward control law of a digital redesigned system is presented. It is assumed that the plant is a linear controllable, time-invariant, Single-Input (SI) or Multiple-Input (MI) system. This procedure allows the use of well-known continuous-time state feedback design methods to directly design discrete-time state-derivative feedback control systems. The state-derivative feedback can be useful, for instance, in the vibration control of mechanical systems, where the main sensors are accelerometers. One example considering the digital redesign with state-derivative feedback of a helicopter illustrates the proposed method. © 2009 IEEE.
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Palavras-chave
Control of mechanical systems, Digital redesign, Linear matrix inequalities, State-derivative feedback, Continuous time, Control laws, Discrete-time, Feedforward control law, Feedforward gain, Linear time invariant systems, Multiple inputs, SIMPLE method, State-derivative feedback control, Time invariants, Adaptive control systems, Analog to digital conversion, Continuous time systems, Discrete time control systems, Feedback control, Feedforward control, Flight control systems, Invariance, Mechanics, Mechatronics, State feedback, Switching systems, Time varying control systems, Vibrations (mechanical), Feedback
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Proceedings of the IEEE International Conference on Control Applications, p. 745-749.