Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 42 for “"simple control"”.
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The development of a simple control system to correct backlash
The control of systems that exhibit backlash has historically been a challenge. In these systems, there are essentially two steady state characteristic response curves separated by a deadband zone. This thesis work is motivated by the desire to accurately control the position of an actuator stem …
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Voltage-Offset Resistive Control for Photovoltaics
This thesis introduces voltage-offset resistive control (VRC) for photovoltaic (PV) applications that exhibits low sensitivity to solar irradiance changes. Although there are numerous control schemes and maximum power point tracking (MPPT) methods for PVs, few focus on maintaining low sensitivity …
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Qualitative Reasoning in an Expert System Framework
… offers many operational advantages (e.g., a simple control structure), but is limited to expressing an expert's surface level knowledge in the form of pattern-decision pairs. The computer should have access to 'deeper' knowledge if it is to understand and justify its planning actions. …
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Inter-fingercoordinated DC motor driven grasping robotic hand
… is both energy inefficient and complicated to control. An alternative method includes employing only one motor to control multiple joints. Investigating humanoid hand movements used in everyday tasks, graduate students working with Professor Asada discovered through Principal Component Analysis …
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Modeling, design, control and validation of a multiple-input DC-DC converter topology for effective renewable energy management
… components, higher power density and centralized control. A novel multiple-input single-output DC-DC converter topology is proposed for effective energy management. The topology is designed depending on the conventional structure of boost and buck converters and benefits greatly from this …
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Applicability of deep learning approaches to non-convex optimization for trajectory-based policy search
… is a powerful tool for determining good control sequences for actuating dynamical systems. In the past decade, trajectory optimization has been successfully used to train and guide policy search within deep neural networks via optimizing over many trajectories simultaneously, subject to a …
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Design and parametric simulation of radially oriented electromagnetic actuators
… a cylindrical surface. Due to its robust design, simple control scheme, and large output force capability, the actuator design is developed to be considered for wellbore manipulation and other downhole oil exploration and production activities. The complete simulation - including capacitor bank …
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Asynchronous Circuit Stacking for Simplified Power Management
… of VDD to the entire stack and incorporating simple control mechanisms, the dynamic range fluctuation problem can be mitigated. A 130nm Bulk CMOS process and a 32nm Silicon-on-Insulator (SOI) CMOS process are used to evaluate the theoretical effect of stacking different circuitry while running …
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Tailoring the angular and spectral reflectance characteristics of color-dynamic films by modifying their photonic texture and topcoat roughness
Controlling nano- and microscale morphology is essential for tailoring the appearance of structurally colored stretchy films. An effective approach for controlling the optical properties of such color-dynamic photonic films, which are manufactured holographically, is demonstrated using two simple …
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Policy regularized model predictive control framework for robust legged locomotion
A novel Policy Regularized Model Predictive Control (PR-MPC) framework is developed to allow general robust legged locomotion with the MIT Cheetah quadruped robot. The full system is approximated by a simple control model that retains the key nonlinearities characteristic to legged contact dynamics …
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Neural Correlates of Theory of Mind in Patients with Euthymic Bipolar Disorder : Comparison with Normal Subjects
… to and inferring from the ambiguous(test) or simple(control) speech task conversed by virtual avatars with happy, neutral or angry emotion. We assessed brain responses associated with the listening and inference of different tasks and also the impact of emotional loading on the task inference. …
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Communicating expertise in system operation and fault diagnosis to non-experts
… the effects on performance of augmenting a simple control panel device with a model of the functions of the device, interacting with the model, and augmenting the device with graphically superimposed procedural indicators (directions). The five augmented display conditions studied were: …
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Weighted arrays for modal isolation and active control of complex structures
… modal isolation and robust broadband feedback control on complex structures with high performance and limited modeling. The weighted array technique proposed here enables the design of reduced-order controllers for complex structures and offers the potential to improve closed-loop robustness …
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Nonlinear control with two complementary Lyapunov function
… new approach which eliminates this challenge: a simple control Lyapunov function [CLF] is assumed then the algorithm seeks to reduce the value of the Lyapunov function. If the control effort would have no effect at any iteration, the CLF is switched in an attempt to regain control. There is some …
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Combustion oscillations in a ducted burner
… speed cine Schlieren photographs.<br/><br/>A simple control volume model of low frequency oscillatory burning is developed which permits important features of the parametric study to be reproduced. Two columns of unburnt mixture and fully burnt gas are linked by a simplified flame zone. …
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Design and control of an anthropomorphic robot finger with multi-point tactile sensation
… this problem through the fabrication and simple control of a planar 2-DOF robotic finger inspired by anatomic consistency, self-containment, and adaptability. The robot is equipped with a tactile sensor array based on optical transducer technology whereby localized changes in light …
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Uncertainty, complication and optimal model construction
… The particular models studied are linear control models in which the embedded optimization is that of observer/ controller design. The existence of an optimal knowledge partition rests on the tradeoff between the gain in accuracy achieved by more knowledge about a system offset by the …
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Applicability of hybrid methods in engine control system design
The new control techniques of off-line model predictive control and level set methods have been applied to the challenges of engine management for diesel exhaust aftertreatment. Theoretical work has been supported by experiments carried out in a diesel engine test cell. A control relevant air-path …
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Multi-parameter control for centrifugal compressor performance optimization
… impeller speed to implement a multi-parameter control on a centrifugal compressor system is assessed. The assessment consists of first developing a one-dimensional meanline model for estimating performance of centrifugal compressor system followed by the formulation of a control framework …
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Digital geometric-sequence control technique for bidirectional dual active bridge DC-DC converters used in future electric vehicles
… for future EVs. Generally, there are two control loops used for bidirectional DC-DC converters: The inner current loop and The outer loop. The control of DAB converters used in EVs are proved to be challenging due to the wide range of operating conditions and non-linear behavior of the …
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