Up to now the parameter space approach was either utilized for robustness analysis or for design of fixed gain controllers. This paper presents an extension of this method which allows the design of gain scheduling co...
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ISBN:
(纸本)9783952426906
Up to now the parameter space approach was either utilized for robustness analysis or for design of fixed gain controllers. This paper presents an extension of this method which allows the design of gain scheduling controllers which simultaneously stabilize a finite number of representatives of an uncertain plant. The approach is applied to an automotive control example.
We consider the efficient solution of the coprime factorization based H∞ controller approximation problems by using frequency-weighted balancing related model reduction approaches. It is shown that for a class of fre...
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We consider the numerically reliable computation of reachability and observability Kalman decompositions of a periodic system with time-varying dimensions. These decompositions generalize the controllability/observabi...
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作者：
Varga, A.DLR Oberpfaffenhofen
German Aerospace Research Establishment Institute of Robotics and System Dynamics WesslingD-82234 Germany
The discrete-time positive periodic Lyapunov equations have important applications in the balancing and potentially also in the model reduction of discrete-time periodic systems. Efficient numerically reliable algorit...
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ISBN:
(纸本)9783952426906
The discrete-time positive periodic Lyapunov equations have important applications in the balancing and potentially also in the model reduction of discrete-time periodic systems. Efficient numerically reliable algorithms based on periodic Schur decomposition are proposed for the solution of these equations. The proposed algorithms are extensions of the method of Hammarling for the case of positive semidefnite solution. Special methods were developed to solve efficiently small order periodic Lyapunov and Sylvester equations.
The non-redundant parametrization of the pole assignment problem for a n-th order system with m inputs allows to express the solution of the problem in term of n(m - 1) free parameters. These parameters can be used to...
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ISBN:
(纸本)9783952426906
The non-redundant parametrization of the pole assignment problem for a n-th order system with m inputs allows to express the solution of the problem in term of n(m - 1) free parameters. These parameters can be used to fulfill additional requirements on the closed-loop system as for instance minimum norm feedback gain matrix, well conditioned eigenvector set, maximum stability radius. One of reliable numerical methods for pole assignment is the so-called Schur method. An extension of this method is proposed which computes the solution of the pole assignment problem corresponding to a non-redundant parameter set. Several possibilities are further investigated to compute minimum norm feedback matrices. An improved approach to compute minimum Frobenius-norm feedback relying on a redundant parametrization is also discussed.
This paper introduces a multi-level power quality assessment approach towards virtual testing of more electric aircraft. Three levels with increasing accuracies are rough, approximated and exact power quality assessme...
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Hybrid systems combine continuous behavior evolution specified by differential equations with discontinuous changes specified by discrete event switching logic. Numerical simulation of continuous behavior and of discr...
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This paper introduces an optimization based approach towards steady-state analysis of switched power electronic systems. The convergence performance of the optimization is improved by the estimation of the state varia...
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ISBN:
(纸本)9781424474639
This paper introduces an optimization based approach towards steady-state analysis of switched power electronic systems. The convergence performance of the optimization is improved by the estimation of the state variables in steady-state. Accurate state variable estimation can be achieved by previously simulating a set of multi-resolution approximations - averaged models of the original topological model using generalized averaging technique. An unified harmonic state space representation for a wide class of power electronic systems is presented to allow automatical generation of the averaged models with selective approximation accuracy. The proposed approach that has been implemented in Dymola is demonstrated by a pulse width modulated buck converter.
The DLR Planetary Roller Spindle Drive (PRSD), a new linear actuator developed at the German Aerospace Center (DLR), transforms fast rotation of a drive into slow but powerful linear movement. To optimize dynamical be...
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