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Grid connection of distributed generation would have a certain impact on safe and stable operation of receiving-end network, so systematic analysis on it would be significant. The method for comprehensive assessment on effects caused by grid connection of distributed generation on power grid is presented. The assessment system is divided into steady-state operation assessment, reliability assessment,...
For speed control system of ship main engine has the typical characteristics of the nonlinear and uncertainty, so it is very difficult to design speed control system of ship main engine. In order to solve the problem, active disturbance rejection speed control system is designed, which the active disturbance rejection control technology is not dependent on the system model. According to the main engine...
In order to improve the accuracy and stability of industrial fault detection and diagnosis, this paper introduces the deep learning theory and proposes an improved Deep Belief Networks (DBNs). In the first, this paper introduces the “centering trick” in the pre-training process of network. This method is done by subtracting offset values from visible and hidden variables. Then, in the process of network...
The modular high temperature reactor (MHTGR), which adopts helium as coolant and graphite as moderator and structural material, has inherent nuclear safety. Based upon multi-modular scheme, i.e. the outlet steam flows of multiple nuclear steam supply system (NSSS) modules are combined together to drive a single turbine, the inherent safety feature can be applicable to the plants at any desired power...
By applying the fractional Lyapunov direct method, this paper addresses the distributed robust containment control problem for a class of fractional-order multi-agent systems (MASs) with heterogeneous unknown nonlinearities and external disturbances. Motivated by the ideas of σ-modification and neural networks (NNs), a distributed adaptive algorithm presented here not only guarantees the containment...
In order to improve the safety of the operation of the hydrogen-cooled generator and ensure the stable operation parameters of the hydrogen as the cooling medium, this paper presents a low-cost and high-performance hydrogen quality monitoring system for the hydrogen-cooled generator with ARM microprocessor as the core. The system consists of a data terminal system and a cloud monitoring platform system...
This paper focuses on the systematic design and development of an optimized embedded system platform from ground up to handle special real-time requirements of control applications. An embedded system is usually embedded as a part of a complete device including hardware and mechanical parts, and both the hardware system and the software system are tailored and optimized to realize specific functions...
In this paper, we propose an approach to distributed localization and motion control of unicycle mobile agents for the target circumnavigation problem. The bearing angle measurement-based localization performs when not all the agents get access to the target, but its performance is decided by the motion behaviors, and vice versa. Therefore we propose a coupled framework where we estimate the relative...
Because of the complexity of crude oil flow, identification of gas-liquid two-phase flow pattern has not been completely solved nowadays. This paper proposed a new classification method of gas-liquid two-phase flow patterns using the sound signals produced by the ball impacting on the valve wall with fluid movement in a non-return valve. A visual detection system of gas-liquid two-phase flow was built...
The health status assessment of power distribution areas (PDA) can provide a basis for the decision-maker to ascertain the unhealthy PDAs among multiple PDAs. In this paper, an evaluation indicator system of the health status of PDAs is established based on four evaluation indicators. A new data acquisition system is proposed in this paper to enhance the reliability of communication system. The evaluation...
The power/signal synchronous transmission between converters has attracted much attention since no extra independent signal transmitting equipment is required. In this paper, bifurcation behaviors of a cascaded two-stage Buck-Boost converter are discussed by simplifying the second stage boost converter as constant power load. The amplitude variation of the bus voltage caused by bifurcation is used...
Failures exist ubiquitously in physical actuators, which usually are uncertain in time, pattern, and value. This effect would deteriorate system tracking performance, and even trigger instability. In this paper, we consider the problem of compensating for actuator failures by proposing a fuzzy control scheme for stochastic nonlinear systems. Comparison with existing research on stochastic nonlinear...
This paper investigates the leader-following consensus problem of the switched multi-agent systems with general second-order dynamics. In the switched systems, we consider two subsystems, CT (continuous-time) subsystems and DT (discrete-time) subsystems. A linear distributed control algorithm is proposed for leader-following consensus in the multi-agent systems with switched dynamics. Moreover, based...
Traditionally the evaluation and supervision of peak shaving operation of thermal power units depend on the simple variable of the minimum achievable load. This method didn't consider the rate of load change and the startup/shutdown time of units, and ignored the safety, emission and economy properties of the units. In addition, the peak shaving operation data of the units were acquired by means of...
This paper discusses the time synchronization issue in wireless sensor networks. An event-triggered average consensus time synchronization algorithm is proposed. This algorithm uses the average time message from one node's one-hop neighbors to update the clock parameters of the node. And it achieved acceptable synchronization accuracy. We also proposed an event-trigger mechanism to reduce the communication...
Based on the optimal firing density of the future airspace window theory, according to the principle that the actual projectile impact point error variance should be the same with the projectile impact point error variance under the theoretical optimal firing density, we put forward the construction method about the aiming point configuration of circle future airspace window. At the same time, by...
For the problem of hefty workload and bring impurity in the process of artificial transformer internal fault detection, a WiFi control based robot is designed to detect the internal fault of the oil-immersed power transformer. The outline structure of the fault detection robot for transformer is illustrated, and WiFi communication module is used to build the control system of the robot. Electromagnetic...
Compliance control using tactile sensor for robotic hands have been one of the major research topics. Most researchers use a variety of multi-dimensional force sensors with compliance control. In this paper, we replace traditional multidimensional force/torque sensor with one-dimensional pressure sensor. In order to achieve the effect of multi-dimensional sensor, we also propose a vector decomposer...
Due to the great performance in complex and narrow spaces, snake-like robots, especially snake arm robots, have gained increasing attention in recent years. In this paper, a novel cable-driven snake arm robot is proposed. For greater flexibility, the snake arm not only has multiple two-degree-of-freedom joints, but also has telescopic modules that have one degree of freedom. The kinematics and statics...
This paper presents an electrical parameter estimation method of the main-circuit insulation test for 1100kV gas insulated switchgear (GIS) equipment in order to realize the rationality of the test segmentation, equipment selection and parameter matching. First, the test method of main-circuit insulation is given. Then, the methods of estimating test capability of the variable-frequency series-resonant...
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