This paper addresses the path following control problem for scale-model fixed-wing aircraft. Kinematic guidance and dynamic control laws are developed within a single coherent framework that exploits a simple generic model of aerodynamics forces acting on the aircraft and applies to almost all regular 3D paths. The proposed control solutions are derived on the basis of theoretical stability and...

VALIDATION AND VERIFICATION OF AIRCRAFT CONTROL SOFTWARE FOR CONTROL IMPROVEMENT

Recent developments in fly-by-wire control architectures for rotorcraft have introduced new interest in the identification of time-varying pilot control behavior in multi-axis control tasks. In this paper a maximum likelihood estimation method is used to estimate the parameters of a pilot model with time-dependent sigmoid functions to characterize timevarying human control behavior. An experime...

This paper presents a new technique for generating linear fractional transformation based uncertainty models for use in the robustness analysis of flight control systems using the structured singular value . The proposed approach does not require closedform linear expressions for the aircraft dynamics – only a non-linear software model of the closed loop aircraft, which can be efficiently trimm...

This work presents an application of Linear Matrix Inequalities (LMI) for the robust control of an F-16 aircraft through an algorithm ensuring the damping factor to the closed loop system. The results show that the zero and gain settings are sufficient to ensure robust performance and stability with respect to various operating points. The technique used is the pole placement, which aims to put...

In this work we present a variational formulation for a multilayer perceptron neural network. With this formulation any learning task for the neural network is defined in terms of finding a function that is an extremal for some functional. Thus the multilayer perceptron provides a direct method for solving general variational problems. The application of this numerical method is investigated th...

This paper considers the problem of intersecting aircraft ows under decentralized con ict avoidance rules. Using an Eulerian standpoint (aircraft ow through a xed control volume), new air tra c control models and scenarios are de ned that enable the study of long-term airspace stability problems. Considering a class of two intersecting aircraft ows, it is shown that airspace stability, de ned b...

A formal approach for the mission planning and control of unmanned aircraft is described. Linear hybrid automata are used to model the chosen aircraft, the resources needed to perform a mission and the environment in which the aircraft will operate. This mission model can be verified with respect to safety criteria, like not running out of fuel, or used to perform parametric analysis, allowing ...

In this paper we present an application of fault identification and control reconfiguration in the context of a high performance aircraft. A second order divided difference filter is used to identify an internal leakage fault in an electrohydraulic actuator found in the aircraft elevator. The identified fault information is then utilized in the formulation of an aircraft systems model for progn...