Munawwar Ali Abbas 1, Yanqin Bai 1,*, Mohammad Mehdi Rashidi 2,3 and Muhammad Mubashir Bhatti 4 1 Department of Mathematics, Shanghai University, Shanghai 200444, China; [email protected] 2 Shanghai Key Lab of Vehicle Aerodynamics and Vehicle Thermal Management Systems, Tongji University, Shanghai 201804, China; [email protected] 3 ENN-Tongji Clean Energy Institute of Advanced Studies, Sha...

ehicle technology at APL encompasses the four disciplines of guidance and control, navigation, aerodynamics/hydrodynamics, and propulsion as applied to military platforms and spacecraft. These disciplines are addressed in terms of historical background at APL, the status of current work, and examples of important new initiatives. The information was compiled for the Senior Leadership Team’s “Ve...

A valuable new resource being developed for today’s soldier are small ducted fan VTOL UAVs. Although beneficial in many ways, a major operational problem of ducted fan vehicles is precise control when flying in crosswinds and turbulent conditions in general. There are two significant, inherent issues associated with ducted fan control in crosswinds; 1) lateral momentum drag and 2) a duct stabil...

Keywords: Articulated vehicles Bluff bodies Road vehicle aerodynamics Square back vehicles Wake flow Wind tunnel tests a b s t r a c t An experimental study has been conducted to investigate both the time-averaged and instantaneous flow pattern over a scale articulated vehicle model for understanding the flow physics of tractor-trailer vehicles. Fully turbulent flow was used in the study and sm...

Mohammad Mehdi Rashidi 1,2, Muhammad Mubashir Bhatti 3, Munawwar Ali Abbas 4 and Mohamed El-Sayed Ali 5,* 1 Shanghai Key Lab of Vehicle Aerodynamics and Vehicle Thermal Management Systems, Tongji University, Shanghai 201804, China; [email protected] 2 ENN-Tongji Clean Energy Institute of Advanced Studies, Tongji University, Shanghai 200072, China 3 Shanghai Institute of Applied Mathematics a...

This paper presents a nonlinear robust control design procedure for a micro air vehicle, which uses the singular value (μ) and μ-synthesis technique. The optimal robust control law that combines parametric and lumped uncertainties of the micro UAV (unmanned aerial vehicle) which are realized by serial connection of the Kestrel autopilot and the Gumstix microprocessor. Thus, the robust control f...

Muhammad Mubashir Bhatti 1, Tehseen Abbas 2, Mohammad Mehdi Rashidi 3,4 and Mohamed El-Sayed Ali 5,* 1 Shanghai Institute of Applied Mathematics and Mechanics, Shanghai University, Shanghai 200072, China; [email protected] 2 Department of Mathematics, Quaid-I-Azam University, Islamabad 44000, Pakistan; [email protected] 3 Shanghai Key Lab of Vehicle Aerodynamics and Vehicle Thermal Ma...

This paper summarizes the initial development of a very small-scale rotorcraft that flies on its own power and carries sensors for atmospheric research or planetary exploration. Initial devices are electrically powered, ranging in size from 2 to 15 cm, and have involved challenges in aerodynamics, control, and manufacturing. Many interesting scaling issues arise as one shrinks a flight vehicle ...