The purpose of this paper is to compare performances between stabilization algorithms quaternion plus attitude rate feedback and rotation matrix for an Earth-pointing spacecraft with magnetorquers as the only torque actuators. From a mathematical point view, important difference two stabilizing laws that can exhibit undesired behavior known unwinding phenomenon. A numerical case study considere...

an involution or anti-involution is a self-inverse linear mapping. in this paper, we will present two real quaternion matrices, one corresponding to a real quaternion involution and one corresponding to a real quaternion anti-involution. moreover, properties and geometrical meanings of these matrices will be given as reflections in r^3.

The purpose of this paper is to attitude estimation of Nano-satellite which requires navigation sensors data to less cost function and effection movement of Nano-satellite focus of the research is to using data of navigation sensors and methods to achieve the requirement of the attitude estimation. in this paper the following attitude estimation of the according to direction of sun of the Nano-...

Formulation of proper and efficient algorithms for robot kinematics is essential for the analysis and design of serial manipulators. Kinematic modeling of manipulators is most often performed in Cartesian space. However, due to disadvantages of most widely used mathematical constructs for description of orientation such as Euler angles and rotational matrices, a need for unambiguous, compact, s...

This paper presents the design of a flexible bending actuator using shape memory alloy (SMA) and its integration in attitude control for solar sailing. The SMA has advantages power-to-weight ratio light weight. mechanism models were designed developed. A neural network based adaptive controller was implemented to non-linear nature actuator. modules integrated into sail model with quaternion PD ...

Most of the recent research on distributed formation control unmanned aerial vehicle (UAV) swarms is founded position, distance, and displacement-based approaches; however, a very promising approach, i.e., bearing-based control, still in its infancy needs extensive effort. In problems UAVs, Euler angles are mostly used for orientation calculation, but susceptible to singularities, limiting thei...

The vectorized algorithms for GPS based attitude determination can be equivalent to a two-level optimal estimation problem. In the first level estimation the GPS carrier phase measurements can be converted to the vector observations in a sense of least squares. The second level estimation is the Wahba’s problem which describes how the attitude matrix can be derived from the vector observations....

This paper contains a concise comparison of a number of nonlinear attitude filtering methods that have attracted attention in the robotics and aviation literature. With the help of previously published surveys and comparison studies, the vast literature on the subject is narrowed down to a small pool of competitive attitude filters. Amongst these filters is a second-order optimal minimum-energy...

Satellite attitude accuracy is an important factor affecting the geometric processing accuracy of high-resolution optical satellite imagery. To address the problem whereby the accuracy of the Yaogan-24 remote sensing satellite's on-board attitude data processing is not high enough and thus cannot meet its image geometry processing requirements, we developed an approach involving on-ground attit...