, Set the size of the chain of integrators n
, Fix a negative value for ? 1
, Fix positive values for and ? (a possible initial value is 0.5 for both)
, Calculate the vectors ¯ z i,j using
, Fix positive values for ?, ?, ? 1 , ? 2 , ? < ? (possible starting values are given in the examples)
, Verify the feasibility of the system of inequalities
, If unfeasible, reduce the value of or modify the value of ? and repeat from step 3. If feasible, the value of |? 1 | might be increased in step 2 until a desired value of T max is obtained without loosing feasibility (recall that in practice, this value might be conservative)
, From the obtained matrices X and Y , calculate P , a, m and M as described in Theorem 6
, Note that the parameters that influence directly the settling-time are ? 1 , ? 2 , ? 1 , ? 2 , ? and ?. The parameters and ? modify the bounds of the inequality (16c), so that its manipulation may relax the feasibility conditions of
, REFERENCES
Homogeneous Approximation, Recursive Observer Design, and Output Feedback, SIAM Journal on Control and Optimization, vol.47, issue.4, pp.1814-1850, 2008. ,
DOI : 10.1137/060675861
URL : https://hal.archives-ouvertes.fr/hal-00362707
Robust exact uniformly convergent arbitrary order differentiator, Automatica, vol.49, issue.8, pp.2489-2495, 2013. ,
DOI : 10.1016/j.automatica.2013.04.034
Lyapunov Functions and Stability in Control Theory, 2005. ,
Continuous finite- and fixed-time regulators, 2016 14th International Workshop on Variable Structure Systems (VSS), pp.120-125, 2016. ,
DOI : 10.1109/VSS.2016.7506902
On homogeneity and its application in sliding mode control, Journal of the Franklin Institute, vol.351, issue.4, pp.1866-1901, 2014. ,
DOI : 10.1016/j.jfranklin.2014.01.007
URL : https://hal.archives-ouvertes.fr/hal-00942326
Verification of ISS, iISS and IOSS properties applying weighted homogeneity, Systems & Control Letters, vol.62, issue.12, pp.1159-1167, 2013. ,
DOI : 10.1016/j.sysconle.2013.09.004
URL : https://hal.archives-ouvertes.fr/hal-00877148
Geometric homogeneity with applications to finite-time stability, Mathematics of Control, Signals, and Systems, vol.17, issue.2, pp.101-127, 2005. ,
DOI : 10.1007/s00498-005-0151-x
Linear systems theory: a structural decomposition approach & Business Media, 2004. ,
Uniform Robust Exact Differentiator, IEEE Transactions on Automatic Control, vol.56, issue.11, pp.2727-2733, 2011. ,
DOI : 10.1109/TAC.2011.2160030
, Input to state stability and allied system properties. Automation and Remote Control, pp.721579-1614, 2011.
Feedback Control Systems, 1992. ,
On conditions of oscillations and multi-homogeneity, Mathematics of Control, Signals, and Systems, vol.37, issue.1, pp.1-37, 2016. ,
DOI : 10.1007/BFb0080630
URL : https://hal.archives-ouvertes.fr/hal-01223154
Realization and Discretization of Asymptotically Stable Homogeneous Systems, IEEE Transactions on Automatic Control, vol.62, issue.11, 2017. ,
DOI : 10.1109/TAC.2017.2699284
URL : https://hal.archives-ouvertes.fr/hal-01514350
Stabilisation of perturbed chains of integrators using Lyapunov-based homogeneous controllers, International Journal of Control, vol.90, issue.12, pp.2631-2640, 2017. ,
DOI : 10.1016/j.cnsns.2013.03.015
Nonlinear Systems. NJ 07458, 1996. ,
Finite-time and fixedtime observers design via implicit Lyapunov function, Control Conference (ECC), 2016 European, pp.289-294, 2016. ,
URL : https://hal.archives-ouvertes.fr/hal-01298162
Finite time stability of non linear systems, IEEE Conference on Decision and Control, pp.3641-3646, 2003. ,
Smooth Lyapunov functions for homogeneous differential inclusions, Proceedings of the 41st SICE Annual Conference. SICE 2002., pp.1974-1979, 2002. ,
DOI : 10.1109/SICE.2002.1196633
Nonlinear Feedback Design for Fixed-Time Stabilization of Linear Control Systems, IEEE Transactions on Automatic Control, vol.57, issue.8, pp.2106-2110, 2012. ,
DOI : 10.1109/TAC.2011.2179869
URL : https://hal.archives-ouvertes.fr/hal-00757561
Robust stabilization of MIMO systems in finite/fixed time, International Journal of Robust and Nonlinear Control, vol.42, issue.10, pp.69-90, 2016. ,
DOI : 10.1201/9781420065619
URL : https://hal.archives-ouvertes.fr/hal-01160052
Finite-time and fixed-time stabilization: Implicit Lyapunov function approach, Automatica, vol.51, pp.332-340, 2015. ,
DOI : 10.1016/j.automatica.2014.10.082
URL : https://hal.archives-ouvertes.fr/hal-01098099
A hybrid observer for fixed-time state estimation of linear systems, Decision and Control (CDC), 2016 IEEE 55th Conference on, pp.5408-5413, 2016. ,
On finite stability in control systems, Rendiconti del Circolo Matematico di Palermo, vol.XV, issue.3, pp.273-283, 1966. ,
DOI : 10.1007/BF02849435
The ISS philosophy as a unifying framework for stability-like behavior In Nonlinear control in the year 2000, Lecture Notes in Control and Inform. Sci, vol.2, issue.259, pp.443-467, 2001. ,
L 2 -gain and passivity techniques in nonlinear control, Lecture Notes in Control and Information Sciences, vol.218, 1996. ,
On systems of ordinary differential equations with generalized homogenous right-hand sides. Izvestia vuzov, Mathematica.(in Russian), vol.1, pp.80-88, 1958. ,