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  • Adaptive model reference control of highly maneuverable high performance aircraft

    Creator:
    Collins, David C. (David Charles), 1969-
    Abstract:
    This thesis presents an adaptive model reference controller for a highly maneuverable high performance aircraft, in particular, a modified F18. An adaptive controller is developed to maneuver an aircraft at a high angle of attack. Thus, the aircraft is required to fly over a highly nonlinear flight regime. The adaptive...
    Resource Type:
    Masters Thesis
    Full Text:
    Adaptive model reference control of highly maneuverable

  • Minimum-cost multi-item coordinated ordering models with dependent set up cost

    Creator:
    Kim, Jae Yearn
    Abstract:
    In this paper, we discuss extensions of two coordinated ordering methods which reduce inventory costs for multi-item systems. Goyal's method, which is useful for constant demand, decreases cost by assigning an order interval for each item, and an optimum number of purchase orders per period. Goyal's method is modified to...
    Resource Type:
    Masters Thesis
    Full Text:
    - Page 1. istics 4 2. Multi-echelon model 5 3. Behavior of an item under a can order policy 34 4

  • Optimal allocation of screening inspection effort for nonserial production systems

    Creator:
    Yum, Bong Jin
    Abstract:
    The economic aspects of quality control have received wide concern since its developmental stages, however, they have not been sufficiently explored. Moreover, as the need for complex products of high precision and reliability increases, most industrial firms have experienced some difficulties in meeting that need at reasonable costs with their...
    Resource Type:
    Masters Thesis
    Full Text:
    efforts within a production process, a mathematical model has been developed for determining the optimal

  • High resolution root locus plots

    Creator:
    Swenson, Edward James
    Abstract:
    A technique is presented for obtaining high resolution root locus plots and Bode diagrams. This is done by translating the origin of coordinates to the area of interest by an appropriate change of variable. The method is applicable to hand calculations or use of a potential analog computer. Examples include...
    Resource Type:
    Masters Thesis
    Full Text:
    the design of high-speed tracking antenna systems and booster control systems. HIGH RESOLUTION

  • Critical evaluation of Ouyang's model reduction method

    Creator:
    Jia, Zuxin
    Abstract:
    A model reduction method for stable, linear, time-invariant, continuous systems is critically studied. This method, proposed by Prof. Ouyang, is based on the concept of power dispersion and the least-squared estimation technique. The reduced models obtained by this method retain the stability of the stable, high order original systems and...
    Resource Type:
    Masters Thesis
    Full Text:
    model can lead to acceptable simplified control system structures (Shahriar, 1981). This topic has

  • Decentralized control of a cable-stayed beam structure

    Creator:
    Volz, Patrick U.
    Resource Type:
    Masters Thesis
    Full Text:
    Model 24 3.3 The Control Law 25 3.4 Proof of Stability (Outline) 28 3.5 Controller Performance 30

  • 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

  • Reduced condensing pressure operation in industrial ammonia refrigeration systems

    Creator:
    Wilcox, Marcus H.
    Abstract:
    A computer model was created using compressor and condenser performance data to simulate vapor-compression ammonia refrigeration system performance under various operating conditions and strategies. The model was used to estimate energy, demand, and cost savings resulting from reduced condensing pressures. Two ammonia refrigeration systems were selected for the investigation into...
    Resource Type:
    Masters Thesis
    Full Text:
    Privacy Dwight 13ushnell A computer model was created using compressor and condenser performance data

  • An adaptive pitch axis autopilot design for an unstable nonminimum phase pitch axis model

    Creator:
    Chen, Long Ren
    Abstract:
    An adaptive pitch axis autopilot design procedure is presented. The design procedure is applicable to both stable and unstable pitch axis models and to those having nonminimum phase. The design approach assumes the adaptive autopilot is activated after achieving level flight. It is shown a rate-feedback compensator can be designed...
    Resource Type:
    Masters Thesis
    Full Text:
    the entire desired flight regime. The adaptive control loop design utilizes a pole-placement algorithm

  • Nonlinear control of high performance aircraft

    Creator:
    Bean, Ronnie A.
    Abstract:
    This thesis presents the design of various controllers for a highly maneuverable, high performance aircraft, namely the modified F-18. The aircraft was required to perform high angle-of-attack maneuvers, for which the aircraft behaves in as a highly nonlinear system. An adaptive PID controller was used to control the aircraft through...
    Resource Type:
    Masters Thesis
    Full Text:
    3.3 Recursive Least Squares 12 4 Previous Work 16 4.1 PIF Control 16 4.2 Optimal Model