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 34 for “"gimbal"”.
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Compliance in a gyroscope gimbal
Thesis: B.S., Massachusetts Institute of Technology, Department of Mechanical Engineering, 1958
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Control System Development for Small UAV Gimbal
… controller design, typically seen on larger gimbals, onto a new small stabilized gimbal, the Tigereye, and demonstrates the application on several small UAV aircraft. The Tigereye gimbal is a new 2lb, 2-axis, gimbal intended to provided high performance closed loop LOS stabilization through …
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Design of a two axis precision gimbal
Thesis (B.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1991.
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Theoretical design of an isoelastic gyroscope gimbal
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1959.
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Using a gimbal to calibrate an inertial measurement unit
… each of the sensors on the IMU is developed. A gimbal consisting of three concentric rings, with rotary encoders measuring the rotation between rings is designed. The IMU is fixed to the inner ring of the gimbal and rotated in space. By sweeping appropriate orientations of the IMU at appropriate …
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Analysis of optimal control of a four-gimbal system
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1980.
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Modeling of a gimbal azimuth drive and simulation of control techniques
A common problem in developing new gimbal products is predicting performance. At the beginning of the design stage, typically the proposal writing stage, it is critical to be able to anticipate the performance of a design, which may still be very roughly defined. Static performance metrics such as …
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Steering law design for redundant single gimbal Control Movement Gyro systems
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1987.
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A numerical, time domain solution for the response of a Gimbal supported gyro
… a numerical solution for the response of a gimbal supported gyro to arbitrary forcing functions and base motion, and includes the normal parasitic effects of bearing friction, viscous pivot damping, and pivot spring constants. There are relatively few restrictions on gyro and gimbal …
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Design and control of a two-axis gimbal system for use in active vision
Thesis (B.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1993.
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A pseudo-optimal control approach for a redundant degree-of-freedom in a gimbaled mechanical system
… long periods of time. The use of four gimbals in such systems allows for elimination of large platform excursions while avoiding the uncontrollable condition of gimbal lock. The thesis investigates the benefits of applying a Linear Quadratic Regulator (LQR) to the control of the …
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Mini Cheetah Sensor Suite for Visual Perception
… and manufactured incorporating a commercial gimbal. Three tests were conducted on a rigid mounted camera and a gimbal stabilized camera. AprilTag detection as well as visual qualitative analysis determined the rigid mounted camera performed better than the current gimbal configuration. …
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Model reduction of a set of elastic, nested gimbals by component mode selection criteria and static correction modes
… with complex structures. The elastic nested gimbal problem is a problem which requires model reduction techniques as a means to reduce the dynamic equations. This is done using two methods: one technique employs mode ranking criteria to select modes which influence the dynamics of the problem …
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Design and testing of a pan-tilt mechanism for severe environments
… are often supported and trained by two-axis gimbals. In current shipboard solutions the payloads are often placed on a platform above the gimbal drive train, which results in high moment loads on drive components during a wave impact. As the payloads grow in size, the moment grows as well, …
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Panoramic Video for Efficient Ground Surveillance from Small Unmanned Air Vehicles
… into a single rendered video stream as a Virtual Gimbal. The panoramic video stream is the first of its kind to be constructed from video transmissions from a small UAV, and the first known video panorama to be used to quickly survey a region within a WiSAR context. The Virtual Gimbal comprises …
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Optimal Slewing of a Constrained Telescope Using Seventh Order Polynomial Input Torques
<p>Two-axis gimbals are frequently used to point cameras and telescopes at various points of interest for surveillance, science, and art. The rotation of a two-axis gimbal system is governed by nonlinear angular momentum equations of motion. This paper presents a method for slewing a telescope in …
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Load bearing interface design for a pan-tilt mechanism for severe marine environments
… (NRL) requested the design of a two-axis gimbal device for the shipboard support of a sensor payload. Previous design efforts presented a low-mass two-axis (pan and tilt) machine. Vibration and shock testing induced failure in the interface between the payload and the tilt shaft, through …
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Spacecraft nonlinear attitude control with bounded control input
… has also been studied. In this context, a gimbal position command generation algorithm has been proposed for a pyramid-type cluster of four single gimbal control moment gyros. The proposed algorithm not only avoids the saturation of the angular momentum input from the control moment gyro …
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Systems Development of a Two-Axis Stabilised Platform to Facilitate Astronomical Observations
… certain estimated system parameters such as gimbal friction. For each gimbal, PI controllers were designed to allow manual orientation control of the telescope, compensated P controllers were designed to achieve target tracking, and compensated PI controllers were designed to reject …
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The Eyeball ROV : an underwater Remotely Operated Vehicle featuring advances in rotational actuation, communication, and localization
… an actuation scheme that utilizes a two-axis gimbal for changing the location of the center of mass of the ROV. This creates continuous and unlimited rotations in place on the part of the ROV, allowing the camera to be panned and tilted. A model of the ROV is presented, and control was tested …
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