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  • Production rates of skyline, balloon, and helicopter yarding systems from gross time study analysis

    Creator:
    Curtis, Richard James
    Abstract:
    This paper describes the analysis of data from a three-year gross time study of skyline, balloon, and helicopter yarding systems operating in Western Oregon. Data collection activities were designed and supervised by the Pacific Northwest Forest and Range Experiment Station, U.S.D.A. Forest Service. The specific logging systems studied were running...
    Resource Type:
    Masters Thesis
    Full Text:
    : Control Skyline Sheaves Engine Dropline drum Capacity Speed Skyline clamp Load capacity Weight

  • 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:
    A model reference adaptive system for control of a

  • A force control algorithm for a wave energy linear test bed

    Creator:
    Henshaw, Nathan R.
    Abstract:
    Researchers at Oregon State University, focusing on the development of ocean wave energy converters, have designed and installed a unique linear test bed to aid in the characterization of these converters. Under the original control scheme, the linear test bed follows a position profile and is limited in its ability...
    Resource Type:
    Masters Thesis
    Full Text:
    Control Model . . . . . . . . . . . . . . . . . 20 3.2.1 Hydrodynamic and Force Equations

  • Heuristic algorithm for multistage scheduling in food processing industry

    Creator:
    Juwono, Cynthia P.
    Abstract:
    A multistage production system consists of a number of production stages that are interrelated, that is the output from one stage forms input to the next stage. There are constraints associated with each stage as well as constraints imposed by the overall system. Besides, there are multiple objectives that need...
    Resource Type:
    Masters Thesis
    Full Text:
    problems using mathematical or operation research (OR) models due to the complexity of the resulting model

  • Nonlinear control applied to power systems

    Creator:
    Vedam, Rajkumar
    Abstract:
    When large disturbances occur in interconnected power systems, there exists the danger that the power system states may leave an associated region of stability, if timely corrective action is not taken. Open-loop remedial control actions such as field-forcing, line-tripping, switching of series-capacitors, energizing braking resistors, etc., are helpful in reducing...
    Resource Type:
    Dissertation
    Full Text:
    device is used to implement the nonlinear controller in this dissertation. A mathematical model of the

  • Applying hierarchical and adaptive control to coordinating simple robots

    Creator:
    Knudson, Matthew D.
    Abstract:
    Coordinating multiple robots to achieve a complex task requires solving two distinct control problems: the high-level control problem of ensuring that each robot aims to perform a useful task (e.g., coordination) and the low-level control problem of ensuring that each robot actually performs the correct actions to achieve its task...
    Resource Type:
    Masters Thesis
    Full Text:
    Hierarchical and Adaptive Control to Coordinating Simple Robots Abstract approved: Kagan Tumer Coordinating

  • Spatially explicit inter-temporal forest management decision under the risk of fire

    Creator:
    Konoshima, Masashi
    Abstract:
    This paper presents a framework for analyzing efficient spatial allocation of forest management efforts - fuel treatment and harvest - under the risk of fire. The framework integrates a fire behavior model and a spatially-explicit stochastic dynamic optimization model. I investigate the effects of spatial interaction across plots during forest...
    Resource Type:
    Dissertation
    Full Text:
    hypothetical landscape. Their model searched for optimal fire control efforts to minimize risk of burning a

  • On the modeling and control of horizontal pendulum wave energy converters

    Creator:
    Boren, Blake C.
    Abstract:
    Presented is an investigation into the modeling, active control design, and simulation of a generic horizontal pendulum wave energy converter, known as a PWEC. A description is provided of the dominant attributes PWECs have, showcasing their promising potential as wave energy converters. Seeking to further promote this potential, an active...
    Resource Type:
    Masters Thesis
    Full Text:
    to optimal and model predictive control theory are given. Simulation of the generic PWEC occurs

  • Aseismic performance of a cable-stayed structure with decentralized H[infinity] control

    Creator:
    Chńg, Guan B.
    Abstract:
    The dissertation uses state-of-the-art structural engineering theories, in parallel with the modern and still-developing control theory of electrical engineering to mitigate the vibratory responses of a double-stayed bridge subjected to strong earthquake ground motions. First, a nonlinear finite element model of the double-stayed bridge subjected to non-uniform (multi-support) earthquake excitations...
    Resource Type:
    Dissertation
    Full Text:
    , Physical Dimensions, and Locations of Sensors and Control Actuators 6 2.2 Finite Element Model of the

  • Planning for controllable network devices in power transmission systems

    Creator:
    Kosterev, Dmitry N.
    Abstract:
    The full capacity of the existing transmission lines is often underutilized due to the system stability requirements. Controllable network devices represent the effective means of improving the system stability, and their deployment allows better use of the existing transmission facilities and can help to avoid construction of new lines. This...
    Resource Type:
    Dissertation
    Full Text:
    Characteristics 40 3.4.1 TCSC Ratings 41 3.4.2 Capability characteristics 42 3.5 Powerflow Model and Control