Download Discontinuous Systems: Lyapunov Analysis and Robust by Yury V. Orlov PDF

By Yury V. Orlov

A significant issue up to the mark engineering is powerful suggestions layout that stabilizes a nominal plant whereas additionally attenuating the impression of parameter diversifications and exterior disturbances. This monograph addresses this challenge in doubtful discontinuous dynamic structures with targeted awareness to electromechanical structures with hard-to-model nonsmooth phenomena similar to friction and backlash. Ignoring those phenomena may possibly seriously restrict functionality so the sensible software of present delicate regulate algorithms turns into questionable for plenty of electromechanical applications.

With this motivation, Discontinuous Systems develops nonsmooth balance research and discontinuous keep an eye on synthesis in line with novel modeling of discontinuous dynamic structures, working lower than doubtful stipulations. even though it is essentially a examine monograph dedicated to the idea of discontinuous dynamic structures, no historical past in discontinuous structures is needed; such structures are brought within the publication on the acceptable conceptual point. Being constructed for discontinuous structures, the speculation is effectively utilized to their subclasses – variable-structure and impulsive structures – in addition to to finite- and infinite-dimensional platforms resembling distributed-parameter and time-delay platforms. The presentation concentrates on algorithms instead of on technical implementation even if theoretical effects are illustrated via electromechanical purposes. those particular functions entire the ebook and, including the introductory theoretical materials convey a few components of the academic to the text.

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Additional resources for Discontinuous Systems: Lyapunov Analysis and Robust Synthesis under Uncertainty Conditions

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3. 20). 32) possess the same solutions. 1) is vibrocorrect if and only if the following relations hold: ∂ θ (z, γ ,t0 ) |γ =0 = b(z,t0 ), ∂γ θ (z, γ1 + γ ,t0 ) = θ (z, γ1 ,t0 ) + θ (z + θ (z, γ1,t0 ), γ ,t0 ). 34) 22 2 Mathematical Models Proof. 1) is vibrocorrect. 32), coupled together, yield ξ (z, v,t0 ) = z + θ (z, v,t0 ). 28). 28. 21) under arbitrary initial conditions ξ (0) = z ∈ Rn and t0 ≥ 0. 19) for all l = 1, . . , n, i, j = 1, . . 2. 3 is completed. 32). 1), thus defined. A simple example, given below, illustrates the capabilities of the distributions theory in a nonlinear setting.

The parameter ρ controls the amplitude of this limit cycle, the parameter 40 2 Mathematical Models μ controls its frequency, the parameter ε controls the speed of the limit cycle transients, and the parameter x0 is for the offset of x (see [238] for details). Being proposed in [196], the Van der Pol modification .. , the parameter x0 = 0 is used, and if the additional term με2 x˙3 is involved. 97). ). The following result is in order [181]. 6. 98) with positive parameters ε , μ , ρ . 99) as t → ∞.

Now define αk (t), βk (t), νk , μk (t), k = 1, 2, . . by αk (t) = t + t 0 uk (s) ds, βk (t) = αk−1 (t) νk = αk (t0 + 1/k) − αk (t0 − 1/k), μk (t) = αk (t0 − 1/k) + νkt and introduce functions ⎧ if s ≤ 0, ⎨ xk (t0 − 1/k + s) if s ∈ [0, 1] ζk (s) = xk (βk (μk (s))) ⎩ xk (t0 + 1/k + s − 1) if s ≥ 1. 12) Then ζk (s), k = 1, 2, . . satisfy the differential equations ζ˙k (s) = f (ζk ,t0 − 1/k + s) + b(ζk ,t0 − 1/k + s)uk (t0 − 1/k + s), s ≤ 0, ν f (ζ , β (μ (s))) + ζ˙k (s) = k k k k 1 + uk(βk (μk (s))) νk b(ζk , βk (μk (s)))uk (βk (μk (s))) + , 0 ≤ s ≤ 1, 1 + uk(βk (μk (s))) ζ˙k (s) = f (ζk ,t0 + 1/k + s − 1) + b(ζk ,t0 + 1/k + s − 1)uk(t0 + 1/k + s − 1), s ≥ 1.

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