10 research outputs found

    Aerial Vehicles

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    This book contains 35 chapters written by experts in developing techniques for making aerial vehicles more intelligent, more reliable, more flexible in use, and safer in operation.It will also serve as an inspiration for further improvement of the design and application of aeral vehicles. The advanced techniques and research described here may also be applicable to other high-tech areas such as robotics, avionics, vetronics, and space

    Ultrafast Active Response Strategy against Malfunction Attack on Fault Current Limiter

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    Fault current limiter (FCL) is a crucial device to guarantee the corresponding breaker can clear the fault with over-limit short-circuit current (SCC). If a FCL is disabled by malicious cyber-attackers, the breaker will fail to clear the fault. Under this circumstance, the breaker failure protection system will be activated to trip all the connected transmission lines, resulting in a severe N-k contingency. In order to deal with the breaking failure caused by FCL malfunction attack, we propose an ultrafast active response strategy (UFARS) based on deep neural network framework. Firstly, an Long Short-Term Memory (LSTM) network is designed to extract features from the time sequence of SCC. Then, a deep reinforcement learning (RL) based approach is proposed to determine the optimal strategy to clear the fault. More specifically, with the features from the LSTM network, the deep RL will select and trip a combination of transmission lines connected to the faulty line, such that the SCC will become smaller than the breaking capacity. Thus, the fault can be cleared with the corresponding breaker. After the fault is cleared, the tripped connected transmission lines will be reclosed to recover the integrity of power system. An environment is established to simulate the power system dynamics and obtain the essential data to train the proposed deep neural network. Numerical results show that the proposed strategy can clear the fault with the minimum impact on power system stability

    Aspects and directions of internal arc protectio

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    Ultrafast Active Response Strategy against Malfunction Attack on Fault Current Limiter

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    Astrionic system optimization and modular astrionics for NASA missions after 1974. Preliminary definition of astrionic system for space tug Mission Vehicle Payload (MVP)

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    Results of preliminary studies to define the space tug astrionic system, subsystems, and components to meet requirements for a variety of missions are reported. Emphasis is placed on demonstration of the modular astrionics approach in the design of the space tug astrionic system

    30th International Conference on Electrical Contacts, 7 – 11 Juni 2021, Online, Switzerland: Proceedings

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    Proceedings of the 2018 Canadian Society for Mechanical Engineering (CSME) International Congress

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    Published proceedings of the 2018 Canadian Society for Mechanical Engineering (CSME) International Congress, hosted by York University, 27-30 May 2018
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