Nonlinear dynamic model of a high-altitude unmanned airship, expressed by generalized coordinate, was built. A nonlinear compensation was introduced into the control loop to linearize and decouple the nonlinear system globally. In view of the imprecisely known inertia parameters of the airship, an adaptive law was proposed based on the feedback linearization to realize asymptotic tracking of an...

We believe that solar powered, autonomous airships with the capability to embark on extended duration sampling missions will serve as valuable tools for environmental science. In this paper, we outline our vision for an autonomous airship and discuss some of the applications for which such a craft would be well suited. We also report on our efforts to date to realize this vision. Specifically, ...

Firstly, a novel structure of indoor quad-rotor airship is proposed to overcome the traditional indoor airship shortcomings such as poor balance and lack of buoyancy in this paper. The kinetic model is established according to the design structure and flight characteristics by the principle of Newtonian mechanics and the laws of physics. The force analysis on the quad-rotor airship, including g...

Stratospheric airship is capable of stationkeeping at high altitude in precondition of the balance of buoyancy and weight, thrust and drag. Based on specific computation process, when some hypotheses are given, the length of airship can be calculated and it is emphasized to analyze the impacts on payload capability performance and conceptual parameters (such as length, surface area and volume) ...

In the context of an airship development programme, inviscid flow behavior and its coupling with structure flexibility are investigated. For this purpose, we have chosen a nonlinear analysis tool relying on the unsteady Euler model for the flow part and the classical elastodynamic equations for the structure. The numerical model for the flow is based on a Mixed Element Volume discretization der...

The stratospheric airship is a kind of aircraft that completely relies on the cycle photovoltaic energy systems to achieve long duration flight. accurate estimation operating temperature solar cell modules extremely important for design photovoltaics system (PV system), output power calculation PV system, and balance. However, related study has been rarely reported. A support vector machine pre...

A blimp is a small airship that has no metal framework and collapses when deflated. In the first part of this paper, dynamic modeling of small autonomous non rigid airships is presented, using the Newton-Euler approach. This study discusses the motion in 6 degrees of freedom since 6 independent coordinates are necessary to determine the position and orientation of this vehicle. Euler angles are...