Simulation Based Envelope Protection Systems for Unmanned Rotorcraft

his paper presents the development of envelope protection systems for unmanned rotorcraft systems using simulation models. Issues associated with unmanned autonomy and automatic limit avoidance systems are addressed. The integration of two types of modular envelope protection systems into a UAV's flight control system, namely envelope protection using command limiting and control limiting is discussed. The development of an envelope protection system as used in Georgia Tech's Yamaha R-Max unmanned helicopter (GTMax) is presented as an example. Copyright © 2005 by the American Helicopter Society International, Inc. All rights reserved.


Evaluation of rotorcraft system identification approaches
Kaymak, Serkan; Tekinalp, Ozan; Kutay, Ali Türker; Department of Aerospace Engineering (2013)
This thesis addresses rotorcraft system identification approaches and estimating the stability and control parameters for linear system identification of a helicopter in hover. Output error and least square methods are used for the system identification. Inputs of the system identification analysis are obtained from the nonlinear helicopter model written in FLIGHTLAB commercial software environment. A linear helicopter model is used for identification. For validation, results obtained from identified helico...
Numerical Simulation of a Flexible X-Wing Flapping-Wing Micro Air Vehicle
Deng, S.; Perçin, Mustafa; van Oudheusden, B. W.; Bijl, H.; Remes, B.; Xiao, T. (2017-07-01)
Numerical simulations were performed to investigate the flowfield around a flexible flapping-wing micro air vehicle using an in-house-developed computational fluid dynamics solver. To include the dynamics of the flexible wings and its impact on the aerodynamic behavior of the micro air vehicle, the wing-deformation pattern during flapping was experimentally determined by a stereovision measurement. These data were subsequently interpolated to be employed as prescribed flapping kinematics in the numerical fl...
Design and control OF X5 unmanned aerial robot
Noudeh, Mehran Ebadollahi; Leblebicioğlu, Mehmet Kemal; Department of Electrical and Electronics Engineering (2015)
This thesis presents a mathematical model and an autopilot of a new type Unmanned AerialRobot(UAR)namedX5withafocusonVerticalTake-offandLanding(VTOL) systems. Physically,itconsistsofalargepropellertocarrythemainpayload,andfour small propellers for controlling the attitude. It presents a nonlinear 6 degrees of freedom (DOF) model of X5 based on Newton-Euler method for simulation and control. The mathematical model introduced in this work includes the rotor dynamics and detailed aerodynamic effects. Theautopi...
Goal oriented modeling of situation awareness in a command and control system
Soğancı, Hasan Ali; Oğuztüzün, Mehmet Halit S.; Department of Computer Engineering (2010)
This thesis presents a preliminary goal oriented modeling of situation awareness in a command and control system. Tropos, an agent oriented software development methodology, has been used for modeling. Use of Tropos allows us to represent, at the knowledge level, the Command and Control actors along with their goals and interdependencies. Through refinement we aim to derive an architectural design for the Situation Awareness component of an Air Defense Command and Control system. This work suggests that goa...
System identification and control of a fixed wing aircraft by using flight data obtained from x-plane flight simulator
Çetin, Ender; Kutay, Ali Türker; Department of Aerospace Engineering (2018)
In this thesis, a linear state-space model of an aircraft is obtained by applying numerical integration system identification method. Flight test data used in the system identification is obtained by using X-Plane flight simulation program. In X-Plane Flight Simulator, the flight tests are made by using different excitations on the control surfaces. The linear models obtained by system identification are verified by applying the inputs to the linear model and then the outputs are compared with the X-Plane f...
Citation Formats
İ. Yavrucuk, “Simulation Based Envelope Protection Systems for Unmanned Rotorcraft,” Chandler, AZ; United States, 2005, p. 669, Accessed: 00, 2021. [Online]. Available: