Actively controlling the attitude of solar sail is necessary to adjust radiation pressure force for trajectory transfer and orbit control. The special configuration makes it very important develop a unique control strategy that differs from traditional methods. An method, based on shape variation booms, proposed in this manuscript. Firstly, we derive equations calculate torque deformed sail. Th...

The work reported in this paper is aimed at designing a velocity/altitude and position controllers for the unmanned helicopter APID MK-III by Scandicraft AB in Sweden. The controllers are able of regulating high velocities via stabilization of the attitude angles within much larger ranges than currently available. We use a novel approach to the design consisting of two steps: rst, a gradient de...

Human (visceral) obesity is associated with alterations hypothalamus-pituitary-adrenal (HPA) axis functioning. It is however not completely clear whether the HPA axis is causally or co-incidentally related to (visceral) obesity. This review summarizes supporting data of an involvement of the HPA axis in the development of (visceral) obesity. First, several DNA polymorphisms related to HPA axis ...

background: appropriate management of chronic conditions requires full knowledge of the situation-related complications and preventive behaviors, which can improve or eliminate these complications. it is also essential to evaluate treatment methods regularly, with respect to the features of each social group and the available resources. objectives: this study aimed to evaluate the level of know...

This paper describes the selection and integration of attitude sensors for a novel flying device. The overall goal of the experimental flyer project is to create a small, cheap, and lightweight device that is capable of controlled flight. This project focuses on the development of a state estimation system for the flyer that allows for precise and rapid attitude measurement. A sensor package co...

This paper reports on the synthesis of different flight controllers for an X-Cell mini-helicopter. They are developed on the basis of the most realistic mathematical model currently available. Two hybrid intelligent control systems, combining computational intelligence methodologies with other control techniques, are investigated. For both systems, Mamdanitype fuzzy controllers determine the se...

An optimized scheme can improve the navigation accuracy of RINS without changing inertial devices. In multi-position stop scheme, IMU remains stationary for most time, which makes motor control easier. However, installation errors and scale factor FOG cause platform misalignment after a certain angle rotation around horizontal axis, resulting in velocity error. Continuous suppress time-varying ...

The problem of reorienting a spacecraft in to acquire a moving target is investigated. The spacecraft is modeled as a rigid body with N axisymmetric wheels controlled by axial torques, and the kinematics are represented by Modified Rodriques Parameters. The trajectory, denoted the reference trajectory, is one generated by a virtual spacecraft that is identical to the actual spacecraft. The open...