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.
Results
Showing 1 to 20 of 92 for “"Minimum-time"”.
-
Quantifying aircraft agility using minimum-time maneuvers
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1990.
-
Terminal transient for minimum-time dash mission
The terminal stage of a minimum-time mission of a high- performance aircraft is studied using both a reduced-order "energy" model formulation and a point-mass model formulation of the aircraft. The mission is confined to vertical plane maneuvers, and is defined as consisting of three stages; a …
-
Energy management of three-dimensional minimum-time intercept
A real-time computer algorithm to control and optimize aircraft flight profiles is described and applied to a three-dimensional minimum-time intercept mission. The proposed scheme has roots in two well-known techniques: singular perturbations and neighboring-optimal guidance. Use of …
-
Control of flexible spacecraft during a minimum-time maneuver
… The zero-order control is to be carried out in minimum time, which implies on-off control. On the other hand, the perturbed model is described by a high-order set of linear time-varying ordinary differential equations subjected to persistent, piecewise-constant disturbances caused by inertial …
-
Minimum Time/Minimum Fuel Control of an Axisymmetric Rigid Body
Many times it is necessary to reorient an aerial vehicle during flight in a minimum time or minimum fuel fashion. This thesis will present a minimum time/fuel control solution to reorienting an axisymmetric rigid body using eigenaxis maneuvers. Any fixed desired attitude can be achieved by rotating …
-
Secure Minimum Time Data Collection (SMTDC) protocol for wireless sensor networks
… a predefined trajectory can improve the real-time data collection duration and efficiency in wireless sensor networks (WSN). Due to the fixed trajectory and limited communication range, data collection is conducted using a many-to-one communication pattern known as convergecast. However, …
-
Nonlinear feedback solution for minimum-time intercept with constant thrust acceleration.
Massachusetts Institute of Technology. Dept. of Aeronautics and Astronautics. Thesis. 1966. M.S.
-
A minimum time response scheme for specified accuracy, path following robot manipulators
Thesis: M.S., Massachusetts Institute of Technology, Department of Mechanical Engineering, 1987
-
Learning a Spatial Field in Minimum Time with a Team of Robots
… problem where the goal is to minimize the time required to learn a spatial field. Specifically, our goal is to ensure that the mean square error between the learned and actual fields is below a predefined value. We study three versions of the problem. In the placement version, the objective …
-
Time-efficient Evacuation Routing Algorithm Incorporating Contraflow
… achieve an effective evacuation plan, evacuation time and computation time need to be short. In this thesis two aspects of evacuation algorithms are discussed: minimum time evacuation using contraflow and minimum time using evacuation routing planning. To make evacuation time shorter by using …
-
A quadratic regulator-based heuristic for rapidly exploring state space
… psuedometric proportional to the length, in time, of the quickest possible trajectory between two points in state space. We derive this minimum-time metric for the double integrator and show that an affine quadratic regulator (AQR) design can be used to approximate the exact minimum-time …
-
Low-latency trajectory planning for high-speed navigation in unknown environments
… of space the vehicle can potentially traverse. A minimum-time, state and input constrained trajectory is generated for each cluster until a collision-free trajectory is found (if one exists). Relaxing position constraints reduces the planning problem to finding the switching times for the …
-
Optimal Paths in Gliding Flight
… First, an approach is developed for planning minimum-time paths, for a fixed speed glider, that are sub-optimal but are guaranteed to be feasible in the presence of unknown time-varying currents. Next the minimum-time problem for a glider with speed controls, that may vary between the stall …
-
An On-Road Investigation of Commercial Motor Vehicle Operators and Self-Rating of Alertness and Temporal Separation as Indicators of Driver Fatigue
… field investigation employed, for the first time, a completely automated, trigger-based data collection system capable of evaluating driver performance in an extended duration real-world commercial motor vehicle environment. The complexities associated with the development of the system, both …
-
Exploring the Impact of Challenging Behaviors on Treatment Efficacy in Autism Spectrum Disorder
… therapeutic interventions with maximum efficacy, minimum time and minimum cost for individuals.</p>
-
System Characterization, Control and Optimal Feed -Rate Scheduling for High -Speed Machining and Nano Positioning
… and completes the required task in the minimum time, while satisfying all performance requirements such as dimensional error, maximum cutting force, etc. A bi-directional scan structure is adopted for the algorithm and a sub-optimization structure for each optimized point. These features …
-
Design of a rapid, continuous, small-scale device for creating dry powders from concentrated suspensions containing active pharmaceutical ingredients
… compounds are large batch processes. The minimum time-to-patient for drug manufacturing is approximately 100 days. Using a continuous manufacturing process, the time-to-patient could be reduced to less than ten days. The scope of this paper encompasses the design of a machine for the …
-
Multi-agent, multi-objective path planning in complex environments
… specifications given on these labels in minimum time. By describing the record of visited labels as an automaton, we translate our problem to a Canadian traveler problem on an adapted state space. We propose a strategy that exploits possible a priori knowledge about the labels and the …
-
A simulator study to evaluate Emergency Alert Lighting system for truck mounted attenuators
… (delay vs. no delay) were compared during daytime and nighttime scenarios. Participants were asked to drive a freeway scenario to observe whether the horn caused any unsafe reactions, then they drove eight different rural highway scenarios in which they encountered a mobile work zone …
Page 1 of 5