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This paper presents an online nonlinear actuator fault detection and isolation system, aiming at monitoring monitor the health of a novel ducted fan UAV. In order to cover wider flight envelope, an unscented multiple model adaptive estimation method is introduced as an extension of the EKF-based method. The proposed method provides a bank of UKFs running in parallel, each of which is responsible for...
We propose the structured two-loop flight control system of a novel tandem ducted fan vehicle for near hover flight in consideration of actuator saturations on its dynamics. The prescribed controller architecture consists of static output feedback inner loop and four PI outer loop, which is a desirable and intuitive structure for practical implementation. The effect of a limited control activity on...
Force and torque generation mechanisms for an unconventional tandem ducted fan aircraft are investigated. Numerical techniques are implemented to obtain quasi-steady thrust, numerical integration of nonlinear equations of motion and trim iteration process, respectively. The comprehensive nonlinear model is derived and simplified to linear approximations at different flight conditions for stability...
The increasing system complexity and time to market constraints are great challenges in current electronic system design. Raising the level of abstraction in the design and performing fast yet efficient high-level analysis, validation and synthesis has been widely advocated and considered as a promising solution. Motivated by the same approach, our work on system-level synthesis is presented in this...
The goal for Artificial Intelligent (AI) in modern video game field is about creating AI that is challengeable and interesting. This paper aims at implementing a method in which AI is controlled by Monte-Carlo Tree Search (MCTS) instead of Finite State Machine (FSM). Regarding as an automatic AI design, NPC controlled by MCTS outperforms FSM-controlled-NPC in mainly three aspects. We predict that,...
Metamodels based on responses from designed (numerical) experiments may form efficient approximations to functions in engineering analysis. They can improve the efficiency of engineering optimization substantially by uncoupling computationally expensive analysis models and (iterative) optimization procedures. This paper investigated the kriging metamodel approach. In order to prove accuracy and efficiency...
In this paper, we propose a improved Markov Random Field (MRF) segmentation model, which integrates region, priori knowledge and boundary information of the image, for segmenting left ventricle (LV) boundary from cardiac MR image. The proposed model incorporates geometry shape boundary information, and improves the objective function of traditional MRF model. Furthermore, Chaotic Simulated Annealing...
Architecture analysis and design language (AADL) is used to describe the hardware and software architectures of embedded applications at the system level. The implementation of such systems is often distributed across asynchronous communication infrastructures. Such a distributed system is usually composed of locally synchronous processes communicating in a globally asynchronous manner, a GALS system...
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