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 67 for “"Open Loop Control"”.
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Optimal open-loop control of industrial robots
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1983.
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Control of mixing in a nonreactive plane shear layer: I. Open-loop control. II. Feedback control.
A control system for the enhancement and regulation of mixing in a nonreactive plane shear layer has been developed in a two-stream closed-return water facility. Mixing of a passive scalar is estimated using a thermal analog in which the two streams have uniform, steady temperatures differing by …
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Constant Orbital Momentum Equilibrium Trajectories of a Gyrostat-Satellite
… relative equilibria on the same COMET, an open-loop control law is developed that drives a gyrostat-satellite along the COMET until the target relative equilibrium is reached. For transitions between relative equilibria on different COMETs, an open-loop control law is developed that …
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Parallelized Distributed Embedded Control System for 2D Walking Robot for Studying Rough Terrain Locomotion
… joint. A distributed, parallelized, embedded control system was developed to provide the control structure for the Jaywalker. This system was chosen for its ability to execute simultaneous tasks efficiently. The two level control system provides a first level to implement a higher level …
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Exploration of Vibrational Control of Two Underactuated Mechanical Systems
Control of underactuated mechanical systems is of interest as it allows for control authority over all of a system's degrees of freedom without requiring actuation of the full system. In addition to this, open-loop control of a system provides the advantage of applying to systems with unmeasurable …
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A Machine Learning Approach to Improve Diameter Control in Desktop Fiber Extrusion Processes
A machine learning approach to controlling the diameter of a desktop fiber extrusion process with a PLC is developed and evaluated against the performance of PID control. The deep reinforcement learning model can learn how to control the output diameter of the process based on a given target …
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High Fidelity Studies in Closed-Loop Control of Unsteady Aerodynamics
… and explore the success of a nonlinear, closed loop flow control strategy based on POD-ROM focusing on boundary-layer transitional flow in high-fidelity computational studies involving FDL3DI ILES code. Controlling the boundary-layer transition from laminar to turbulent allows the laminar …
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Model-free tracking control of an optical fiber drawing process using deep reinforcement learning
… learning (DRL) approach for tracking control of an optical fiber drawing process is developed and evaluated. The DRL-based control is capable of regulating the fiber diameter to track either steady or varying reference trajectories in the presence of stochasticity and non-linear …
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Force Feedback for Reliable Robotic Door Opening
Opening a door is still a hard problem in robotics. Many robotic manipulators use open-loop position control to open doors, which reduces reusability and reliability in the face of slight differences or sensor errors. Many others use force feedback or impedance control but skip past the problem of …
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Reduction Of Vortex-driven Oscillations In A Solid Rocket Motor Cold Flow Simulation Through Active Control
Control of vortex-driven instabilities was demonstrated via a scaled-down, cold-flow simulation that modeled closed-end acoustics. When vortex shedding frequencies couple with the natural acoustic modes of a choked chamber, potentially damaging low-frequency instabilities may arise. Although …
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Predictive Control of Electric Motors Drives for Unmanned Off-road Wheeled Vehicles
… friendly, they are also easier to control. This also gives another reason to enhance further the energy economy of those unmanned electric vehicles. Off-road vehicles research was always challenging, but in the present work the nature of the off-road land is utilized to benefit from …
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Optimizing dynamic locomotion in Baleka II: from simulation to real-world running
… by achieving rapid legged locomotion through open-loop control. Building upon its predecessor, this research seeks to evaluate the robot's capacity to perform agile tasks by incorporating trajectory optimization algorithms and conducting real-world experiments. The study is structured around …
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Development of time delay voltage control for lead acid battery using arduino
A time delay controller with voltage control technique is designed and developed in this project. In order to control the output voltage, a DC-DC buckboost converter has been development. The buckboost circuit with mosfet as a switching component has been drives by using gate driver as a medium …
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Three phase inverter for induction motor control using fuzzy-pi controller with arduino
… inverter for induction motor using Fuzzy-PI controller with Arduino. The Fuzzy-PI controller is designed using the Matlab’s Simulink program software. The purpose of the controller is to control the current fed to the induction motor during motor operation. Using this Fuzzy-PI control …
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On the operability of heat exchanger networks
… the degree to which plants may be satisfactorily controlled. This report presents a study of the operability of heat exchanger networks (HENs).The integration of heat exchange systems such as HENs typically results in significant steady-state cost savings which is the motivation for their …
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Spingineering : quantum control in the presence of relaxation
… processes can be corrected or ameliorated using open loop control with unitary controllers. We examine the different mechanisms of decoherence and relaxation on simple spin systems and discuss when the modes can be corrected. We show experimentally the feasibility of our correction schemes using …
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Development of PID current control for DC motor using arduino
… is to design and to develop of PID Current Control that could be applied for the DC motor. The control technique was called as current control technique by comparing the output current with the reference current. Thus, the PID controller will force the output current to follow the reference …
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Two Methods for Modeling Scalar Hysteresis and their use in Controlling Actuators with Hysteresis
The accurate control of a positioning system that exhibits scalar hysteresis requires a control strategy that incorporates compensation for the hysteresis. One approach is to develop a compensator based on an inverse hysteresis operator. This method uses an open loop control in which the inverse …
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Nonlinear optimal control and near-optimal guidance strategies in spacecraft general attitude maneuvers
Solving the optimal open-loop control problems for spacecraft large-angle attitude maneuvers generally requires the use of numerical techniques whose reliability is strongly case dependent. The primary goal of this dissertation is to increase the solution reliability of the associated nonlinear …
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A perturbation approach to control of rotational/translational maneuvers of flexible space vehicles
An open loop control law is applied to a flexible spacecraft that admits translational, as well as rotational and flexural motion. The translational degrees of freedom are coupled to the rotation and deformation through the active controls applied to the structure. The objective of any maneuver is …
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