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A bipolar dc microgrid features three voltage levels and is capable of transmitting power more efficiently than a unipolar system. This paper proposes a droop control to achieve load sharing and voltage balancing in such a microgrid system. Droop control is adopted to ensure that autonomous sharing of load power can be realized without communication. Moreover, the positive and negative pole voltages...
A novel design of pose deformation system for mobile robots is presented in this paper, which transforms the position of moveable wheels by pushrods mechanism to adapt rough road conditions. A simulation method, which combined the control schemes and physical structures through the Bond Graph and Simulink, is utilized to model the pose deformation and running control process of the proposed design...
Controller placement is an important problem in software-defined networks. If a controller fails, there may be no controller with enough spare capacity to serve switches of the failed controller, which leads to switches being disconnected from the controller. Even if there are controllers with enough spare capacity, reassigning switches of the failed controller may drastically increase the worst case...
This article deals with a case study of application of wireless sensor networks for control of emergency situations in an automated manufacturing. The control design approach of manufacture, which is using as self-energy production solutions and municipal utility services, is discussed. The correlation of manufacturing processes with emergency situations in critical infrastructure is taken in the...
This paper addresses challenges part of the shift of paradigm taking place in the way we produce, transmit and use power related to what is known as smart grids. The aim of this paper is to explore present initiatives to establish smart grids as a sustainable and reliable power supply system. We argue that smart grids are not isolated to abstract conceptual models alone. We suggest that establishing...
As the near space atmospheric environment is complicated and variational, aircraft electric propulsion system parameters and load characteristics of the propeller will be changed, if the control method of electric propulsion system shall not be treated, the system stability and reliability will be affected. A novel double close loops control method with current and speed was presented in this paper,...
The competitive market poses high requirements to automation systems. Fulfilling considerable requirements concerning flexibility, availability and efficiency, they have become complex mechatronic systems, featuring both discrete and continuous behavior. For reducing efforts concerning time and costs during the life cycle of production plants, simulation methods are widely applied in the development...
The reliability for measure and control system of a space environment simulator is analyzed in the paper to build the models. The paper systematically summarizes the state of measure and control system. The system structure and principles are introduced. According to requirement of environmental test, working procedures of the system are divided into the particular assignments. On the basis of reliability...
Networks on chips (NoCs) provide a mechanism for handling complex communications in the next generation of integrated circuits. At the same time, lower yield in nano-technology, makes self repair communication channels a necessity in design of digital systems. This paper proposes a reliable NoC architecture based on specific application mapped onto an NoC. This architecture is capable of recovering...
In this paper we propose a set of different configurations of failure recovery schemes, developed for network-on-chip (NoC) based systems. These configurations exploit the fact that communication in NoCs tends to be partitioned and eventually localized. The failure recovery approach is based on checkpoint and rollback and is aimed towards fast recovery from system or application level failures. The...
In this paper, we propose a cross-layer optimization approach that exploits retransmission diversity in wireless CDMA communications. Conventionally, data packets that are not correctly detected are usually dropped. These dropped packets can be used to help data packet detection. By exploiting all the retransmitted packets, data packets can be correctly detected with higher probability. The proposed...
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