Browsing by Subject "Controls"
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Item Advanced controls and modeling of a hybrid vehicle(2008-12) Harrison, Matthew; Gale, Richard O.; Maxwell, Timothy T.The Texas Tech University Advanced Vehicle Engineering Team has been working in vehicle competitions for 20 years. From that experience the team designed a hybrid vehicle to compete in the Challenge X Competition and the EcoCAR Competition. The Challenge X competition was designed around General Motors' Equinox, which was donated by General Motors. From that platform the team went into the design, implementation, testing and calibration of the vehicle in order to design a low-emission, fuel-efficient vehicle of the future. The vehicle was a mild hybrid 2007 Saturn Geenline Vue. In this way, Texas Tech and its sponsors can give back to the community and help the environment and global economy. After the completion of the Challenge X Competition, the EcoCAR Competition began in 2008, which followed in the Challenge X Competition's footsteps. The EcoCAR design team is currently in the designing phase of the project; it is during this stage of the project that the design team will decide with what vehicle architecture the team will submit for competition. This thesis discusses the steps taken in the implementation of the Challenge X vehicle for years 3 and 4 of the competition. Also, it has the initial design architectures for the EcoCAR competition and the team structure that will enable the team to function to the best of its ability.Item Numerical examples of output regulation for waves and beams(Texas Tech University, 2005-08) Johnson, Vijay Moses Dev; Gilliam, David S.; Seshaiyer, PadmanabhanThis research work is concerned with the numerical implementation of a geometric design methodology for obtaining feedback control schemes capable of shaping the response of hyperbolic dynamical systems. In this work we are interested in the important design objectives referred to as asymptotic tracking. This type of problem represents one of the central problems in control theory. In this work we want to obtain numerical approximations of control laws capable of controlling a plant, described by hyperbolic partial differential equations, in order to have its output track a reference signal (and/or reject a disturbance) produced by a finite dimensional external generator or exogenous system. For linear distributed parameter systems this represents an extension of the geometric theory of output regulation. We also provide simple criteria for solvability of the regulator equations based on the exosystem. Two different kind of examples of set-point and harmonic tracking are dealt with this work, one for One Dimensional Wave Equation and the other for Hinged Beam Equation. Modified Euler Method is used for solving the two equations numerically. Finally we present several directions of future research in this area.Item Numerical examples of output regulation for waves and beams(2005-08) Johnson, Vijay Moses Dev; Gilliam, David S.; Seshaiyer, PadmanabhanThis research work is concerned with the numerical implementation of a geometric design methodology for obtaining feedback control schemes capable of shaping the response of hyperbolic dynamical systems. In this work we are interested in the important design objectives referred to as asymptotic tracking. This type of problem represents one of the central problems in control theory. In this work we want to obtain numerical approximations of control laws capable of controlling a plant, described by hyperbolic partial differential equations, in order to have its output track a reference signal (and/or reject a disturbance) produced by a finite dimensional external generator or exogenous system. For linear distributed parameter systems this represents an extension of the geometric theory of output regulation. We also provide simple criteria for solvability of the regulator equations based on the exosystem. Two different kind of examples of set-point and harmonic tracking are dealt with this work, one for One Dimensional Wave Equation and the other for Hinged Beam Equation. Modified Euler Method is used for solving the two equations numerically. Finally we present several directions of future research in this area.