Abstract:The paper is focused on the comparison between some classical robust stability conditions for continuous-time linear time-invariant systems. Such conditions are given as lemmas in the paper, since their statements include some generalizations, needed in order to better compare (and use) them. The analysis is carried out by comparing pairwise the families of systems whose stabilization through a given compensator is guaranteed by each of the considered robust stability conditions. Some properties of the familie… Show more
“…In particular, given H(z), let Q(z) and G(z) be designed so that the closed loop system Σ D depicted in Figure 1 is asymptotically stable. Such a property can be easily verified, for example, by using the Nyquist criterion for multi-input multi-output systems [35][36][37]. and G(z) can be carried out by using directly the transfer function H(z), which, in turn, can be determined directly from the hybrid transfer function W ( , z) by using the expressions given in (10).…”
Section: Synthesis Of a Controller For Hybrid Lti System Through A DImentioning
confidence: 99%
“…1 is asymptotically stable. Such a property can be easily verified, for example, by using the Nyquist criterion for multi‐input multi‐output systems [35–37].…”
Section: Synthesis Of a Controller For Hybrid Lti System Through A mentioning
In this paper, the problem of designing a controller for a hybrid system with impulsive input and periodic jumps is addressed. In particular, it is shown that any hybrid system with impulsive inputs and periodic jumps can be recast into a discretetime, linear, time-invariant system, which, in turn, can be used to design a controller by using classical methods. Furthermore, it is shown that, once such a controller has been designed, it can be readily used to control the hybrid system by mean of an interfacing system that is based just on the continuous-time dynamics of the plant to be controlled. Several examples, spanning from aerospace to biomedical applications, are reported in order to corroborate the theoretical results.
“…In particular, given H(z), let Q(z) and G(z) be designed so that the closed loop system Σ D depicted in Figure 1 is asymptotically stable. Such a property can be easily verified, for example, by using the Nyquist criterion for multi-input multi-output systems [35][36][37]. and G(z) can be carried out by using directly the transfer function H(z), which, in turn, can be determined directly from the hybrid transfer function W ( , z) by using the expressions given in (10).…”
Section: Synthesis Of a Controller For Hybrid Lti System Through A DImentioning
confidence: 99%
“…1 is asymptotically stable. Such a property can be easily verified, for example, by using the Nyquist criterion for multi‐input multi‐output systems [35–37].…”
Section: Synthesis Of a Controller For Hybrid Lti System Through A mentioning
In this paper, the problem of designing a controller for a hybrid system with impulsive input and periodic jumps is addressed. In particular, it is shown that any hybrid system with impulsive inputs and periodic jumps can be recast into a discretetime, linear, time-invariant system, which, in turn, can be used to design a controller by using classical methods. Furthermore, it is shown that, once such a controller has been designed, it can be readily used to control the hybrid system by mean of an interfacing system that is based just on the continuous-time dynamics of the plant to be controlled. Several examples, spanning from aerospace to biomedical applications, are reported in order to corroborate the theoretical results.
Following the technique proposed by Arnold for matrices (time-invariant autonomous systems), and extended by Tannenbaum to time-invariant linear control systems (with inputs and outputs), a normal form for linear periodic discrete-time systems depending on physical parameters is proposed. The considered actions are deformations, i.e. linear periodic transformations depending on the parameters, being identity at the nominal values of them
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