An autopilot scheme of volumetric-modulated arc therapy (VMAT)/intensity-modulated radiation therapy (IMRT) planning with the guidance of prior knowl-edge is established with recorded interactions between a planner and a commercial treatment planning system (TPS). Microsoft (MS) Visual Studio Coded UI is applied to record some common planner-TPS interactions as subroutines. The TPS used in this...

This paper solves an accurate fixed-time attitude and position control problems of a quadrotor UAV system. The aircraft system is subject to nonlinearities, parameter uncertainties, unmodeled dynamics, external time-varying disturbances. To deal with the under-actuation problem quadrotor’s hierarchical structure inner–outer loop framework adopted for flight design. Robust nonlinear strategies a...

Modeling and experimental identification results for a small unmanned aerial vehicle (UAV) are presented. The numerical values of the aerodynamic derivatives are computed via the Digital DATCOM software using the geometric parameters of the airplane. Flight test data are utilized to identify the stability and control derivatives of the UAV. The aerodynamic angles are estimated and used in conju...

A piloted simulation was conducted to study handling qualities for capsule spacecraft entering the Earth’s atmosphere. Eight evaluation pilots, including six pilot astronauts, provided Cooper-Harper ratings, workload ratings, and qualitative comments. The simulation began after descending through the atmospheric entry interface point and continued until the drogue parachutes deployed. There wer...

In developing an aircraft simulation, a number of aircraft dynamic models are available with a range of fidelity. However, many applications of simulation also require a model of the flight control or of the pilot to realize their goals. These models can be difficult to implement using classical control methods and, in the case of flight control systems, may not be publicly available. This pape...

This letter addresses the problem of steering a robotic vehicle along geometric path specified with respect to reference frame moving in three dimensions, termed Moving Path Following (MPF) motion control problem. The MPF is solved for large class vehicles that require minimum positive forward speed operate. restriction poses additional challenges design, and developed using concepts, wherein a...

Icing has now become an important factor endangering flight safety. This paper takes the icing data of NACA 23012 airfoil as example, establishes influence model for real-time simulation based on time and aircraft angle attack, analyzes different geometry characteristics. The two-dimensional interpolation method is used to improve aircraft’s stall area, which mainly divided into correction lift...

A dynamic model that considers both linear and complex nonlinear effects extensively benefits the model-based controller development. However, predicting a detailed aerodynamic with good accuracy for unmanned aerial vehicles (UAVs) is challenging due to their irregular shape low Reynolds number behavior. This work proposes an approach full translational dynamics of quadrotor UAV by feedforward ...

Motivated by challenging mission scenarios, this paper tackles the problem of multiUnmanned Aerial Vehicle (UAV) cooperative control in the presence of time-varying communication networks. Specifically, we address the problem of steering a fleet of UAVs along given paths (path following) so as to meet spatial and/or temporal constraints. One possible scenario is the situation where a fleet of v...