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 47 for “"three degree-of-freedom"”.
-
Three Degree-of-Freedom Parallel Actuator Telescope Mount
… contains the design, implementation, and testing of an original, small-scaled two degree-of-freedom telescope mount and a medium-scaled three degree-of-freedom telescope mount inspired by the six degree-of-freedom Stewart-Gough platform telescope mount. The end product is intended to achieve …
-
Dynamics of three-degree-of-freedom systems with quadratic nonlinearities
The dynamics of two three-degree-of-freedom systems with quadratic nonlinearities are studied. The first system has two simultaneous two-to-one internal resonances. The second has a combination internal resonance. In both cases the response to a primary resonant excitation of the third mode is …
-
Simulations of a three degree of freedom brachiating Y-bot robot
Brachiation is a means of locomotion for lightweight apes like gibbons. It involves the animal swinging its arms to gain moment and swing forward. A large amount of research has been done studying a simplified two-link two DOF robot, named "acrobot" by Mark Spong. While the problems of this robot …
-
Design of a three degree of freedom force-reflecting haptic interface
Thesis (B.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1993.
-
Enhancement of non-motorized three degree of freedom assessment tool for stroke patients
The use of robotic devices for physical rehabilitation of the upper limb following brain injury can assist physiotherapists in rehabilitation program. The presence of robotic rehabilitator will help physiotherapists to assess the stroke patients effectively during their rehabilitation process. …
-
The design and implementation of a three degree of freedom force output joystick
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1990.
-
The development of a three-degree-of-freedom vibration control system test facility
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1994.
-
Improved design of three-degree of freedom hip exoskeleton based on biomimetic parallel structure
… needs. This thesis introduces a novel design of a three-degree of freedom parallel robotic structured hip exoskeleton, which is quite different from these existing exoskeletons. An exoskeleton unit for walking typically is designed as a serial mechanism which is used for the entire leg or …
-
Three Degree-of-Freedom Simulator Motion Cueing Using Classical Washout Filters and Acceleration Feedback
… The latter was the case for Virginia Tech's three degree-of-freedom motion-base. The most common method of motion cueing is to use washout filters to produce the best motion cues within the physical limitations of the motion system. This algorithm is named the classical washout algorithm and …
-
Control system design for a three degree of freedom virtual environment simulator using motor/brake pair actuators
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1990.
-
Determination of interaction curves for the stability of a three degree of freedom, shallow arch model under multiple dynamic loads
The primary purpose of this study is to determine stability boundaries (interaction curves) for a three degree of freedom, shallow arch model under multiple dynamic loads. The model consists of four rigid bars connected by frictionless pins, with rotational springs and dashpots at the three …
-
Ride Simulation of Passive, Active, and Semi-Active Seat Suspensions for Off-Road Vehicles
… active, and semi-active suspension systems for off-road vehicle seat suspensions. Each suspension model was combined with a three degree of freedom model of the vehicle operator to formulate models of the ride systems of off-road vehicles. Ride performance of the suspension systems were computer …
-
An application of linear covariance analysis to the design of responsive near-rendezvous missions
This thesis investigates a new class of launch vehicles capable of being released from an aircraft which ultimately have the goal of achieving near-rendezvous conditions at orbital altitudes up to 800 km. These launch vehicles would be capable of carrying small payloads, on the order of two to six …
-
Pitch-Control Predictor-Corrector and Neural Network Ascent Guidance
… and evaluated for a rocket-based upper stage of a two-stage-to-orbit launch vehicle. Detailed descriptions of the predictor-corrector algorithm and a neural network loop modification are given. The mission requirement is insertion into a stable 50 x 100 nmi orbit at 375,000 ft altitude, …
-
Comparison of robotic positional control strategies
A comparison of robotic positional control strategies was done using computer simulation on a three degree-of-freedom manipulator. The manipulator was subjected to different payloads, trajectories at different velocities, varying different controller sample rates and different motor saturation …
-
Approximations for Singular Integral Equations
This work is a numerical study of a class of weakly singular neutral equations. The motivation for this study is an aeroelastic system. Numerical techniques are developed to approximate the singular integral equation component appearing in the complete dynamical model for the elastic motions of a …
-
Orbital rendezvous using an Augmented Lambert Guidance scheme
The development of an Augmented Lambert Guidance Algorithm that matches the position and velocity of an orbiting target spacecraft is presented in this thesis. The Augmented Lambert Guidance Algorithm manipulates the inputs given to a preexisting Lambert guidance algorithm to control the boost of a …
-
Effects of stabilizer bars on road vehicle ride quality
… improve the safety and road-holding capabilities of vehicles, manufacturers have begun a trend toward increasing vehicle body roll resistance by introducing stiffer roll-stabilizer bars. In this study vehicle suspension and road surface models are developed to investigate the effects of such …
-
Aggressive landing maneuvers for unmanned aerial vehicles
VTOL (Vertical Take Off and Landing) vehicle landing is considered to be a critically difficult task for both land, marine, and urban operations. This thesis describes one possible control approach to enable landing of unmanned aircraft systems at all attitudes, including against walls and ceilings …
-
An investigation of the dynamic lateral stability and control of a parawing vehicle
Parawing vehicles may have unusual values of many of the mass and aerodynamic factors affecting dynamic lateral stability and control. These unusual characteristics are due in large part to the fact that the center of gravity of parawing vehicles is located far below the parawing, whereas …
Page 1 of 3