Based on magnetometer measurements only, three-axis attitude, rate, and orbit estimation are successfully achieved. A single Augmented Dynamics Extended Kalman Filter (ADEKF) is configured by combining the spacecraft nonlinear attitude dynamics and quaternion kinematics with orbital mechanics. The filter design is adopted for three-axis stabilized

A nonlinear control scheme using a Modified State-Dependent Riccati Equation (MSDRE) is developed through a pseudo-linearization of spacecraft augmented nonlinear dynamics and kinematics. The full-state knowledge required for the control loop is provided through a generalized algorithm for spacecraft three-axis attitude and rate estimation based on

A generalized algorithm for spacecraft three-axis attitude and rate estimation is presented. The filter concept presented here is quite general and applicable to a wide range of sensor systems. The structure of the filter is built using spacecraft nonlinear dynamics in the presence of momentum exchange devices. Then quaternion kinematics are augmen

This paper presents the application of a Modified State–Dependent Riccati Equation MSDRE approach in multi-object attitude and rate tracking. A nonlinear controller using the MSDRE is developed through a pseudo-linearization of spacecraft augmented nonlinear absolute dynamics and kinematics. The developed controller is adopted to solve a trajecto

Vehicle clamping is a practice that started in the 1950’s in order to enforce traffic and parking regulations usually inside private premises.It often involves the immobilization of a vehicle via a wheel lock that is attached to the tyres of a car in order to make sure that it cannot be driven. However, not only is this practice burdensome to dri

In this paper design of active suspension in a quarter car model is presented. The idea of suspension is to improve the ride quality while maintaining good handling characteristics to different road disturbance. The purpose of designing the active controller for vehicle suspension systems is to decrease the traditional design between ride and handl

Marine benthic dinoflagellates can be found in many different habitats including seaweeds, dead coral and sediments. New species are continuously being described based on morphology and molecular approaches, this is obviously a type of organisms which has been overlooked in many parts of the world. However, subsequent identifications by other resea

يحاول صياغة نظرية معاصرة في موضوع الأهلية، ضمن إطارمقاصد الشريعة، مع الاستفادة من معطيات العلوم النفسية الحديثة. ونظراً لأنالأحكام الشرعية تتناول المراحل العمرية للإنسان، وما يتعرض له من أح�

Background: Melastoma malabathricum L. (family Melastomaceae) has been traditionally used as remedies against various ailments including those related to pain. The methanol extract of M. malabathricum leaves has been proven to show antinociceptive activity. Thus, the present study aimed to determine the most effective fraction among the petroleum e

Background Methanol extract of Bauhinia purpurea L. (family Fabaceae) (MEBP) possesses high antioxidant and anti-inflammatory activities and recently reported to exert hepatoprotection against paracetamol (PCM)-induced liver injury in rats. In an attempt to identify the hepatoprotective bioactive compounds in MEBP, the extract was prepared in diffe