Nonlinear control problems in turbofan engines are challenging. No single nonlinear controller can achieve desired effects a full flight envelope, but the case of multiple controllers, there exist bumpless transfer between different controllers. To this end, paper presents mechanism for an uncertain switched system based on integral sliding mode (ISMC), and be used speed engines. The is to desc...

Beginning in the mid-1980s, the phenomenon of capital flight from developing countries received considerable attention in the economics literature. Capital flight destroys the domestic macroeconomic environment and decreases transparency and accountability. It restricts financial resources when a country is looking for economic growth and development. The purpose of this article is to measure t...

This paper presents a Linear Parameter Varying (LPV) modeling approach for the longitudinal motion of a Boeing 747 series 100/200. The three approaches used to obtain the quasi-LPV models are Jacobian Linearisation, State Transformation, and Function Substitution. Linear Parameter Varying models are a key step in applying LPV control synthesis which guarantee a level of stability and robustness...

This paper applies a model reduction method for linear parameter-varying (LPV) systems based on parameter-varying balanced realization techniques to a body freedom flutter (BFF) vehicle. The BFF vehicle has a coupled short period and first bending mode with additional structural bending and torsion modes that couple with the rigid body dynamics. These models describe the BFF vehicle dynamics wi...

Designing the motion platform for flight simulator is closely coupled with particular aircraft’s envelope. While in training, pilot on has to experience same feeling as aircraft. That means that simulators need simulate all cases and forces acting upon during flight. Among many existing mechanisms, parallel mechanisms based Stewart are suitable because they have six degrees of freedom. In this ...

This letter presents the modeling, system identification and nonlinear model predictive control (NMPC) design for longitudinal, full envelope velocity of a small tiltwing hybrid unmanned aerial vehicle (H-UAV). A first-principles based dynamics is derived identified from flight data. It captures important aerodynamic effects including propeller-wing interaction stalled airfoils, but still simpl...

This paper details the application of an adaptive neural network based limit detection and avoidance algorithm for envelope protection on the autonomous Yamaha R-Max unmanned helicopter test bed. Software-in-the-loop and flight test results are presented. The envelope protection system is implemented as a mid-level controller component into the unmanned helicopter software infrastructure, calle...

Recent decades have witnessed increased interest in the design, development and testing of unmanned underwater vehicles for various civil and military missions. A great array of vehicle types and applications has been produced along with a wide range of innovative approaches for enhancing the performance of UUVs. Key technology advances in the relevant area include battery technology, fuel cell...

A reliability assessment framework is presented for small unmanned aerial vehicles. The analysis considers several candidate architectures with different numbers of controllable surfaces and servos. It is assumed that a servo fault detection algorithm is available and affected by known rates of false alarms and missed detections. The aircraft flight envelope is analyzed to determine the fault l...