In previous continuous opinion dynamics models based on bounded confidence assumptions, individuals can only influence each other’s opinions when those opinions are sufficiently close; subsequently, agents construct their self-opinions using opinions collected from other agents. All of these models lack the element of an agent’s inner self-attitude. In this paper we describe our proposal for a ...

A novel adaptive unscented Kalman filter (AUKF) based estimation algorithm is proposed for a 3U Cubsat. This small satellite employs a three axis magnetometer and three MEMS gyroscopes as well as three magnetic torque rods and one reaction wheel on the pitch axis. Unlike the existing UKF, in this paper, an n+1 sigma set is used to estimate the nanosatellite attitude instead of 2n + 1 sigma poin...

An overview of air-bearing spacecraft simulators is provided. Air bearings have been used for satellite attitude determination and control hardware veriŽ cation and software development for nearly 45 years. It is interesting to consider the history of this technology: how early systems were Ž rst devised and what diverse capabilities current systems provide. First a survey is given of planar sy...

This paper presents a computationally-fast inverse dynamics model based on unit quaternion orientation representation for use in the generation of unmanned aircraft trajectories when the flight envelope may include all flight path orientations, a necessary attribute for aerobatics or unmanned air-to-air combat vehicles. The model removes the inherent singularities in Euler-angle attitude repres...

This paper presents a localization fusion technique for civil-engineering machines. It is designed for 6 DOF position and attitude determination. The system uses an optical instrument called SIREM, which provides azimuth and elevation angles of known landmarks. The approach is based on dead-reckoning techniques updated by the external measurements of SIREM using the Extended Kalman Filter forma...

The relative motion control for an uncertain chaser spacecraft to approach a tumbling space target is investigated in this paper. The nonlinear coupled dynamics for relative translational and rotational motions of the two spacecrafts are modeled. Based on the model, relative position and attitude controllers are designed by a unified nonlinear robust adaptive control method without using the ta...

This article describes the framework and dynamics of an evidence-based practice mentorship program for staff nurses. Staff development educators can be instrumental as leaders in an evidence-based practice fellowship program, as they foster a thirst for lifelong learning, assist with developing a questioning attitude, and inspire nurses to ask clinical questions. The program serves as a bridge ...

A nonlinear adaptive attitude controller is designed in this paper that compensates for dynamic uncertainties in the spacecraft inertia matrix and unknown dynamic and static friction effects in the control moment gyroscope (CMG) gimbals. Attitude control torques are generated by means of a four single gimbal CMG pyramid cluster. The challenges to develop the adaptive controller are that the con...

This paper presents an investigation into development of feed-forward and feedback control strategies for active vibration suppression and attitude control of flexible spacecrafts. The feed-forward loop consists of a computed-torque scheme and a command shaping technique based on component synthesis vibration suppression (CSVS) method which was developed based on linear systems theory. For rela...

Methods for measuring or estimating ground shape by a laser range finder and a vision sensor (Exteroceptive sensors) have critical weaknesses in terms that these methods need a prior database built to distinguish acquired data as unique surface conditions for driving. Also, ground information by Exteroceptive sensors does not reflect the deflection of ground surface caused by the movement of UG...