Here is a recent book chapter I wrote that is available for download free of charge. http://mts.intechopen.com/articles/show/title/analysis-and-control-of-nonlinear-attitude-motion-of-gravity-gradient-stabilized-spacecraft-via-lyapRead more "Book Chapter-Analysis and Control of Nonlinear Attitude Motion of Gravity-Gradient Stabilized Spacecraft via Lyapunov-Floquet Transformation and Normal Forms"
In this new article, we present a straightforward approach to accomplish model order reduction on the invariant center manifold for large-dimensional nonlinear systems subjected to external periodic excitations. This relatively plain and direct approach is applicable to both parametrically excited and constant coefficient nonlinear systems. Our approach is powerful because it is liberated from typical […]Read more "Center Manifold Reduction of Nonlinear Dynamics With External Periodic Excitations"
In my latest article, we present a powerful direct approach to simplify complexly structured nonlinear systems with external periodic excitation via normal forms. This approach is liberated from special treatment of nonlinear systems such as ‘book-keeping’ parameters, detuning parameters etc. It does not mandate the system to be minimally excited and the system may possess […]Read more "Simplifying Nonlinear Systems With External Periodic Excitation"
In my latest journal article I have a mouthwatering treat in; gravity gradient attitude stabilization, periodic nonlinear spacecraft attitude dynamics, Chebyshev polynomials, Hopf bifurcation, sliding mode control, Lyapunov-Floquet transformation, Normal Forms, system state augmentation etc. The article titled ” Control of Nonlinear Spacecraft Attitude Motion via State Augmentation, Lyapunov-Floquet Transformation and Normal Forms ” is […]Read more "Control of nonlinear spacecraft attitude dynamics"
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After a protracted process stretching beyond 5 years, the African Union (AU) Space Working Group delivered the African Space Policy document late last year (African Space Strategy V10_1). This document was subsequently adopted by African education, science and technology ministers and is expected to be approved by the AU Heads of States Summit in January 2016. This is […]Read more "African Space Policy"
African moon mission seeks cash for first phase By Paula Park A group of African space enthusiasts have taken to the internet to raise money for what they say will be the continent’s first moon mission. Africa2Moon’s main goal is to send a probe to orbit or land on the moon and beam back video […]Read more "African Space Technology Initiatives"
Following the brutal attacks at Westgate Mall in Nairobi, I would like to convey my heart-felt condolences to the family and friends of the victims. This inexplicable and despicable beastly act occurred on 21st September 2013. May the fallen RIP and we pray for a rapid and wholesome recovery for the survivors. May God further […]Read more "Westgate Mall Attack"
During the better part of last week, the discovery of two aquifers in Turkana County, Kenya dominated the headlines of major global media outlets. These colossal underground water reserves (which have been confirmed by drilling) are estimated to contain a minimum of 250 billion cubic meters of water replenished annually at a rate of 3.4 […]Read more "Turkana Tale: Space Technology and Colossal Aquifers"