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Filtering by: Creator Si, Qi Remove constraint Creator: Si, Qi Academic Affiliation Mechanical Engineering Remove constraint Academic Affiliation: Mechanical Engineering

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  • Linearized model for wind turbines in yaw

    Creator:
    Chaiyapinunt, Somsak
    Abstract:
    The analysis of rigid hub, three-bladed horizontal-axis, axisymmetric wind turbines in yaw is made using a linearized, four-degree-of-freedom model. The linearized equations of motion of rotor and nacelle are developed using quasi-steady blade element theory and Lagrange's equations. The yaw behavior of the system is studied from coefficients of the...
    Resource Type:
    Dissertation
    Full Text:
    matrix [M]fili) + + [K]fqi) = fG) where {qi} is a four-dimensional generalized coordinate column vector

  • A model reference adaptive system for control of a flexible mechanical manipulator

    Creator:
    Lee, Byeung Kyun
    Abstract:
    For control of a flexible manipulator, the assumed- mode method is applied to the mathematical model of the model reference adaptive system. In the assumed-mode method, the flexible, continuous manipulator is described by a limited number of degrees of freedom. A modified model reference adaptive system is studied for direct...
    Resource Type:
    Dissertation
    Full Text:
    admissible functions satisfying the geo- metric boundary conditions and qi are the generalized coordinates

  • Robustness of uncertain systems : globally optimal Lyapunov function

    Creator:
    Ahmadkhanlou, Fariborz
    Abstract:
    The Lyapunov direct method is utilized to determine the robustness bounds for nonlinear, time-variant uncertainies p[subscript i]. Determination of the robustness bounds consists of two principal steps: (i) generation of a Lyapunov function and (ii) determination of the bounds based on the generated Lyapunov function. Presently in robustness investigations, a...
    Resource Type:
    Dissertation
    Full Text:
    (Qi) °I m(Si) subject: Ai Si + Si Ai = -Qi (3-26) Based upon the assumption that Ai has all

  • Thermodynamic analysis of geothermal energy systems with forced recovery from aquifers

    Creator:
    Lee, Se Kyoun
    Abstract:
    A thermodynamic analysis of forced geoheat recovery from aquifers has been accomplished. The system investigated consists of a single recharging-discharging well pair, in a horizontally extensive aquifer, with either power generation or space heating as surface applications. The space heating systems investigated are (i)direct heating, (ii)heat pumps and (iii)a combination...
    Resource Type:
    Dissertation

  • An experimental investigation of drilling mud discharged into a flowing stratified environment

    Creator:
    Mohebbi, Behrooz
    Abstract:
    An experimental study of the short-term fate of a drilling mud discharged into a flowing stratified environment was conducted to determine its dilution and settling characteristics. The drilling mud used in this test had a specific gravity of 1.184 and a composition of 12 percent by weight high-gravity solids (BaSO₄)...
    Resource Type:
    Dissertation
    Full Text:
    and outer surfaces pl - reference pressure Qi - volume rate of ith solid passing out of plume q

  • A theoretical study of the radiative contribution to heat transfer between a high-temperature, large-particle gas-fluidized bed and an immersed tube

    Creator:
    Mahbod, Bahram
    Abstract:
    An analytical model of the radiative contribution to the total heat transfer between a large-particle (greater than 1 mm) gas-fluidized bed and an immersed horizontal tube is discussed. The model is applied to the case of a bubbling bed and the emulsion phase contribution is obtained from a detailed analysis...
    Resource Type:
    Dissertation
    Full Text:
    - f aT1(yj)dF4_i(yi) j=1 A. 3 (3.20) (3.21) where qi, for i=1 to 4, is the net radiation leaving

  • Transient fuel pin temperature calculations using describing functions

    Creator:
    Guidotti, Timothy E.
    Abstract:
    An important element in rector safety and fuel performance assessments is the efficient calculation of the time dependent temperature profiles within reactor fuel pins. Because the fuel pins have temperature dependent thermal properties, the governing partial differential equations are nonlinear. Traditionally, finite difference or finite element methods have been used...
    Resource Type:
    Masters Thesis
    Full Text:
    fuel surface, qi(t), and the coolant temperature, T.(t), are used to calculate the clad transient

  • Estimation of physical parameters in mechanical systems for predictive monitoring and diagnosis

    Creator:
    Nickel, Thomas
    Abstract:
    Monitoring, diagnosis and prediction of failures play key roles in automatic supervision of machine tools. They have received much attention because of the potential for reduced maintenance expenses, down time, and an increase in the equipment utilization level. At present, signal analysis techniques are predominantly used. But methods involving system...
    Resource Type:
    Dissertation

  • Derivation and automatic generation of Kane's dynamical equations for mechanical manipulators

    Creator:
    Nie, Tinglin
    Abstract:
    To design and precisely control a manipulator requires developing an efficient dynamic model of the system. The present work demonstrates how this can be accomplished by employing Kane's dynamical equations. First, a detailed manual derivation of the equations of motion for a particular robot is presented in such way that...
    Resource Type:
    Dissertation
    Full Text:
    cosine of angle qi, that is si = sin(qi) ci = cos(qi) The abbreviations such as sij = sin(qi+qj

  • Kinematics of arthropod legs : modeling and measurement

    Creator:
    Albright, Stephen L.
    Abstract:
    This thesis presents a method for determining the kinematic geometry of arthropod legs. A kinematic description makes possible the analysis of arthropod leg motion, as a prelude to investigating how various arthropod species are able to negotiate diverse terrains. Such knowledge will aid in design of legged vehicles. The focus...
    Resource Type:
    Dissertation
    Full Text:
    +1 showing error in parameter length Si. 106 5.10. Projection of error cones i and i+1 onto plane