The wrist plays a critical role in the performance of the overall manipulator system, Payload capacity, workspace, range of motion, and other performance parameters are often limited by the capabilities of the wrist. Therefore, robotic wrist design has been an area of prime interest among researchers and industry alike. Research in the mechanics of robotic wrists has focused on serial architect...

Simplified models relating pitch and roll angle measurements of a roving vehicle to terrain slope and vehicle attitude were developed. The simplified models are based on previously published models by Rowe and Spencer [1] and Yang et al. [2]. These simplified models are easier to implement using microcontroller technology reducing the number of trigonometric function calculations, improving pro...

in this paper, a robust tracking control method for automatic take-off and trajectory tracking of a quadrotor helicopter is presented. the designed controller includes two parts: a position controller and an attitude controller. the attitude controller is designed by using the sliding mode control (smc) method to track the desired pitch and roll angles, which are the output of position controll...

After emerging from underground nests, sea turtle hatchlings migrate through the surf zone and out to the open ocean. During this migration, both waves and water currents can disrupt hatchling orientation by unpredictably rotating the turtles away from their migratory headings. In addition, waves cause turtles to roll and pitch, temporarily impeding forward swimming by forcing the hatchlings in...

A novel method for estimating vehicle roll, pitch and yaw using machine vision and inertial sensors is presented that is based on matching images captured from an on-vehicle camera to a rendered representation of the surrounding terrain obtained from a 3 dimensional (3D) terrain map. United States Geographical Survey Digital Elevation Maps (DEMs) were used to create a 3D topology map of the geo...

BACKGROUND AND PURPOSE Patients with right hemispheric stroke usually present an anticlockwise deviation of the subjective visual vertical (SVV) in the frontal (roll) plane. However, the occurrence of a similar disorder in the sagittal (pitch) plane has never been assessed. We investigated the subjective visual vertical in both planes in those patients. METHODS Eight patients, 4 with spatial ...

Handling pose variations for face recognition system is a challenging task. The recognition rate is drastically decreasing with the images captured in uncontrolled environment having pose variations in yaw, pitch and roll angles. When the face image with frontal pose it is proved that the recognition system performs well. In this research an attempt is made to reconstruct frontal pose face imag...

This paper presents an LQR-Based 6DOF control of an unmanned aerial vehicles (UAV), namely a small-scale quadrocopter. Due to its high nonlinearity and a high degree of coupling system, the control of an UAV is very challenging. quadrocopter trajectory tracking in a 3D space is greatly affected by the quadrocopter balancing around its roll-pitch-yaw frame. Lack of precise tracking control about...

This study examined two kinematical features of the rotational vestibulo-ocular reflex (VOR) of the monkey in near vision. First, is there an effect of eye position on the axes of eye rotation during yaw, pitch and roll head rotations when the eyes are converged to fixate near targets? Second, do the three-dimensional positions of the left and right eye during yaw and roll head rotations obey t...

---An aircraft contains three rotational motions like pitch, yaw and roll. The roll motion is controlled by the ailerons that are present on either side of an aircraft. In this paper, ailerons are considered as plant and its transfer function is used in modeling of the controller. The PID controller modeled performs better roll motion with good stability. From the MATLAB simulation results it i...