Spilios Theodoulis

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Abstract—This article presents a detailed study concerning the equilibrium analysis and the linear parameter-varying (LPV) modeling of the six degrees-of-freedom (6DoF) nonlinear model of a fin-guided, gun-launched projectile. The equilibrium manifold of the system is obtained through a minimal vector of parameters characterizing its flight envelope and a(More)
This article deals with the design of a pitch/yaw dynamics load factor autopilot for a 155mm spin-stabilized projectile which is controlled using a nose-mounted course correction fuse equipped with two rotating aerodynamic surfaces. A q-LPV model necessary for controller synthesis, which considers the actual sensor position in the fuse, is proposed. An(More)
This article presents an experimental setup for parameter identification and control algorithm design for a guided projectile placed inside a wind tunnel. A detailed description of the hardware contained in the projectile such as the actuators, sensors and the embedded computer is given. The associated software environment, namely a custom realtime Linux(More)
The goal of this article is threefold: (1) Present a thorough model of a generic fin-guided projectile involving the 6DoF nonlinear dynamics, equilibrium point computation, Linear Parameter Varying (LPV) modeling & stability analysis concepts (2) Investigate various structures of low complexity closed loop feedback controllers that could be potentially(More)
This article explores in detail the influence of the sensor position on the pitch/yaw dynamics modeling and on the autopilot design and performance for a 155mm canard-guided spin-stabilized projectile which incorporates a nose-mounted course correction fuse (CCF) for trajectory correction. A complete and exact nonlinear model is given and used for computing(More)