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  • Wind Engineering  (2)
  • linear dynamical systems  (1)
  • maximum principle  (1)
  • 1
    Electronic Resource
    Electronic Resource
    State estimation of linear dynamical systems under bounded control (1992)
    Springer
    Journal of optimization theory and applications 72 (1992), S. 299-318 
    Details
    ISSN: 1573-2878
    Keywords: Reachable sets ; linear dynamical systems ; bounded controls ; n-dimensional systems
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: Abstract The problem of estimation of all possible states that a linear system under bounded control may take (namely, the reachable or attainable set) is addressed. A number of previously developed Lyapunov techniques for estimating the reachable set of ann-dimensional linear system are extended and compared. The techniques produce over-estimates in the form ofn-dimensional ellipsoids. Illustrative examples are solved.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00940520
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Outer ellipsoidal approximations of the reachable set at infinity for linear systems (1996)
    Springer
    Journal of optimization theory and applications 89 (1996), S. 157-173 
    Details
    ISSN: 1573-2878
    Keywords: Reachable sets ; linear control systems ; Lyapunov functions ; maximum principle
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: Abstract Outer ellipsoidal approximations to the reachable set at infinity for a linear control system with bounded scalar controls are obtained using a new method based on quadratic Lyapunov functions. These outer approximations are compared with those given by an algorithm due to Sabin and Summers, and also with certain tangential outer approximations, obtained using a fixed-point iteration scheme.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02192646
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    A three-dimensional simulation of wind flow around buildings (1986)
    Chichester : Wiley-Blackwell
    International Journal for Numerical Methods in Fluids 6 (1986), S. 113-127 
    Details
    ISSN: 0271-2091
    Keywords: Wind Engineering ; Control Volume Method ; Wind Flow Simulation ; Engineering ; Engineering General
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: The steady Navier-Stokes equation is solved to simulate the wind-flow environment of three-dimensional configurations of buildings. The method assumes an incident wind described by a power-law velocity profile. A new method for controlling the two-part nested solution iteration is introduced. The simulation is compared to some published wind-tunnel measurements.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/fld.1650060303
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    A random vortex simulation of wind-flow over a building (1985)
    Chichester : Wiley-Blackwell
    International Journal for Numerical Methods in Fluids 5 (1985), S. 849-871 
    Details
    ISSN: 0271-2091
    Keywords: Random Vortex Method ; Wind Engineering ; Engineering ; Engineering General
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: The random vortex method of Chorin1 provides a numerical simulation of high-Reynolds number flow in two dimensions. The method can be used to model the viscous interaction of wind with a surface-mounted obstacle of arbitrary cross-section. In this paper the method has been used to investigate the flow of wind over common building shapes; an inlet profile is chosen to represent the stationary aspects of the atmospheric boundary layer. The evolution of flow over a short time-interval after flow initialization is depicted, and a mean value of pressure coefficient, Cp, is calculated over the building perimeter. Some comparison is made with published wind-tunnel measurements for the case of a surface-mounted square-section block and for a building model with 10° roof pitch.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/fld.1650051002
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    Paper (German National Licenses)
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