- Portland, Oregon, United States
- My interests are in the electric IoT system and the terminal study and manufacture. I am having been a prof. at Wuhan... moreMy interests are in the electric IoT system and the terminal study and manufacture. I am having been a prof. at Wuhan University for over 20 years. Meanwhile, I also run a high tech. Company named SUNTRANS M & C System Co., ltd.. which in Guangzhou, China. I am always an open-minded person making friends both professionally and in social life who has the same interests. It has devoted me to the field of Smart building, Smart power grid, and AI-controlled HVAC.edit
A new-type of intelligent electric load control switch composed of three separate magnetic latching relays is presented. A method of AC current and voltage sampling and root mean square (RMS) calculation is employed to ensure reliable... more
A new-type of intelligent electric load control switch composed of three separate magnetic latching relays is presented. A method of AC current and voltage sampling and root mean square (RMS) calculation is employed to ensure reliable operation of the electric load. The method possesses such features as less hardware requirements, good real-time performance, high frequency interference eliminating. Current zero-crossing break is the most outstanding advantage of the switch. In order to guarantee the magnetic latching relay shut off at current zero-crossing point accurately in long term operation, a dynamic compensation for delay time is proposed based on all-around research of the properties of magnetic latching relay actuation time. Finally, an application of the switch in the electric load control system constructed via CAN bus and ZigBee network is well brought forth.
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Electrical load forecasting plays a key role in energy scheduling and planning. It is a challenge to predict electric load accurately due to the versatility of electrical loads and the vast number of users in DSM of low-voltage side. Most... more
Electrical load forecasting plays a key role in energy scheduling and planning. It is a challenge to predict electric load accurately due to the versatility of electrical loads and the vast number of users in DSM of low-voltage side. Most of electrical load forecasting research focused on single model prediction or combination model prediction, which cannot get the optimal performance for some cases. Therefore, how to gather maximum optimal information from various different models is a key point in load forecasting and analysis. In this paper, an optimal selection method of multiple models for electrical load forecasting is studied. This method overcomes the shortcoming of unitary model, such as the instability and poor accuracy in some cases. To evaluate the forecast performance, a practical case is studied based on the intelligent electricity management system, which is presented by Wuhan University. It can be seen that the prediction error of the forecasting models can be calcul...
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Wireless sensor and actuator network (WSAN) are composed of a large number of heterogeneous sensors and actuators. In the automated WSAN, sensors are collaborated to monitor the physical phenomenon in the surveillance field, while the... more
Wireless sensor and actuator network (WSAN) are composed of a large number of heterogeneous sensors and actuators. In the automated WSAN, sensors are collaborated to monitor the physical phenomenon in the surveillance field, while the actuators are to collect sensing data, process the data and perform appropriate actions without the existence of central controller. Most WSANs are used in the real-time sensing and reaction systems towards physical environment. In this paper, we propose a real-time architecture for automated WSAN to bind the latency in applications. In the architecture, we present distributed mechanisms for sensor-actuator event reporting and self-aware coordination to maintain the delay bound sensor-actuator communication. And then we present mechanism for ordered multi-event task assignment, and the acting coordination mechanism to provide efficient reaction and execution of the event task in time. Preliminary simulation results are presented to demonstrate the advantages of our solutions.
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A modelling approach of the motion dynamics of a four-wheel electric robot is proposed. The mechanism analysis method is employed to establish a mathematical model for a robot.With experimental data of various scenarios for the step... more
A modelling approach of the motion dynamics of a four-wheel electric robot is proposed. The mechanism analysis method is employed to establish a mathematical model for a robot.With experimental data of various scenarios for the step responses of the system, the parameters of the model are identified. Simulation shows the feasibility and reliability of the motion modelling approach.
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... at relatively low costs; possibility for connectivity to the Internet; flexible coexistence with GSM voice; providing ... out of the admission of the setting, it is regarded that there are electrical thefts and ... This is the... more
... at relatively low costs; possibility for connectivity to the Internet; flexible coexistence with GSM voice; providing ... out of the admission of the setting, it is regarded that there are electrical thefts and ... This is the principle of preventing electric larceny based on the balance of power ...
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... In the future work, an asymmetrical half-bridge converter [10] topology, which is more convenient to realize soft switch-ing, will be employed ... REFERENCES [1] Wen feng, Jiang jiuchun, Zhangweige, and Guo huiping, Research on the... more
... In the future work, an asymmetrical half-bridge converter [10] topology, which is more convenient to realize soft switch-ing, will be employed ... REFERENCES [1] Wen feng, Jiang jiuchun, Zhangweige, and Guo huiping, Research on the charge mode of series-connected batteries ...
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ABSTRACT Load shifting (LS) is a main task of demand side management (DSM). It has been treated as a kind of oper- ation efficiency improvement in the POET (performance, operation, equipment and technology) frame- work and has been... more
ABSTRACT Load shifting (LS) is a main task of demand side management (DSM). It has been treated as a kind of oper- ation efficiency improvement in the POET (performance, operation, equipment and technology) frame- work and has been formulated as an optimal control problem. In literature, the number of pump switches and the accumulative operation time of individual pumps are barely considered in the operation optimization of pump stations. In this paper, we integrate the two issues into the general optimal control (GOC) problem of pumping stations to form an optimal control problem with consideration of pump switches (OCPS) and an optimal control problem with consideration of accumulative operating time (OCOT), respectively. Particle swarm optimization (PSO) algorithm is employed to solve the newly formu- lated problems. An intake pump station is taken as a case study. GOC, OCPS, OCOT and a hybrid of OCPS and OCOT (OCPS + OCOT) are applied to the station for simulation study. The results show that the opti- mal control approaches have the ability to achieve both energy efficiency and LS. Nearly 30% energy cost savings can be obtained by the optimal control approaches. The savings are mostly generated by shifting the operation status of the pumps according to time, specifically, time-of-use (TOU) tariff. Compared with GOC, the newly proposed approaches are more feasible for field applications.
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... The collector module is installed at this place in charge of collecting each household electricmeter data via RS485 bus ... This contributes to less bandwidth and energy consumption. ... 1] A. Mahmood, M. Aamir, and MI Anis, Design... more
... The collector module is installed at this place in charge of collecting each household electricmeter data via RS485 bus ... This contributes to less bandwidth and energy consumption. ... 1] A. Mahmood, M. Aamir, and MI Anis, Design and Implementation of AMR Smart Grid Sytem ...
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Antenna’s servo-control system based on aeroboat is a 3-loop DA mixed control system composed of position feedback, velocity feedback and current feedback. The system combined with stabilized loop and tracking loop realizes real-time... more
Antenna’s servo-control system based on aeroboat is a 3-loop DA mixed control system composed of position feedback, velocity feedback and current feedback. The system combined with stabilized loop and tracking loop realizes real-time pointing movement of the antenna. To eliminate the effect on aiming at the target of aeroboat motion, the server-control of 3-axis angle position is realized based on the direct current torque motor drive. The system isolates influence of aeroboat’s movement effectively, responds quickly, and it has good self-adapting ability to non-linear and time-changing of controlled object.
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Wireless sensor and actuator network (WSAN) are composed of a large number of heterogeneous sensors and actuators. In the automated WSAN, sensors are collaborated to monitor the physical phenomenon in the surveillance field, while the... more
Wireless sensor and actuator network (WSAN) are composed of a large number of heterogeneous sensors and actuators. In the automated WSAN, sensors are collaborated to monitor the physical phenomenon in the surveillance field, while the actuators are to collect sensing data, process the data and perform appropriate actions without the existence of central controller. Most WSANs are used in the real-time sensing and reaction systems towards physical environment. In this paper, we propose a real-time architecture for automated WSAN to bind the latency in applications. In the architecture, we present distributed mechanisms for sensor-actuator event reporting and self-aware coordination to maintain the delay bound sensor-actuator communication. And then we present mechanism for ordered multi-event task assignment, and the acting coordination mechanism to provide efficient reaction and execution of the event task in time. Preliminary simulation results are presented to demonstrate the advantages of our solutions.
Research Interests:
A modelling approach of the motion dynamics of a four-wheel electric robot is proposed. The mechanism analysis method is employed to establish a mathematical model for a robot.With experimental data of various scenarios for the step... more
A modelling approach of the motion dynamics of a four-wheel electric robot is proposed. The mechanism analysis method is employed to establish a mathematical model for a robot.With experimental data of various scenarios for the step responses of the system, the parameters of the model are identified. Simulation shows the feasibility and reliability of the motion modelling approach.
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An intelligent three-Phase voltage unbalance measuring instrument is presented in this paper. This instrument is designed on the ATT7022C. To improve its performance, the two degree Newton interpolation algorithm is applied. The... more
An intelligent three-Phase voltage unbalance measuring instrument is presented in this paper. This instrument is designed on the ATT7022C. To improve its performance, the two degree Newton interpolation algorithm is applied. The three-Phase voltage unbalance is calculated based on the definition of the voltage unbalance factor (VUF) defined by the International Electrotechnical Commission (IEC). The results of the experiments show that this instrument is effective, feasible and precise.
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This paper proposes the application flow of mean-shift clustering in NILM system. The raw data is extracted by meter which install on the main electric entrance of the resident, the mean-shift clustering is based on the data after events... more
This paper proposes the application flow of mean-shift clustering in NILM system. The raw data is extracted by meter which install on the main electric entrance of the resident, the mean-shift clustering is based on the data after events detector processing, and the result of clustering is used as input data of final identification. A actual residential trail is given to show the clustering is available in the NILM system.
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Research Interests: Thermodynamics, Analytical Chemistry, Construction Materials, Wireless Sensor Networks, Sensors, and 14 moreComputer Simulation, Wireless Technology, Real Time, Fires, Adaptive Routing, Fire Hazard, Time Factors, Emergencies, Computer communication networks, Fire Extinguishing Systems, Wireless Sensor Network, Electrical And Electronic Engineering, Rescue work, and Disaster planning
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Chaos generation is an interesting research topic in the study of coupled complex dynamical networks. In this paper, based on mathematical analysis of Lyapunov exponent and boundedness of networks, the emergence of chaos for a class of... more
Chaos generation is an interesting research topic in the study of coupled complex dynamical networks. In this paper, based on mathematical analysis of Lyapunov exponent and boundedness of networks, the emergence of chaos for a class of nonlinear complex networks is investigated and some new criteria of chaos generation are derived. The effectiveness of theoretical results is verified by a numerical example.
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This paper is focused on the measure and control system for large pumping station auxiliary equipments. The design of system has advantages as follows, functions of sensing measure, compensation calculation and policy control are... more
This paper is focused on the measure and control system for large pumping station auxiliary equipments. The design of system has advantages as follows, functions of sensing measure, compensation calculation and policy control are decentralized to the intelligent measure and control equipments in the field improve stability and reliability of the system; digitalized application eliminates the analog signal transmission errors and fundamentally improves the accuracy of measure and control; CAN-Bus has a higher data transfer rate and distribution capacity of bus resources; isolated CAN-Bus design makes the system anti-overvoltage ability strong; simple requirements of communication network wiring highlight the economy of the system. The application of the system is also described in the paper.
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A high-precision pH sensor based on electrochemical principle is proposed in the paper. The principle of the sensor, the performance parameters of MCU, hardware architecture and experiment are introduced. The NEC microprocessor, which is... more
A high-precision pH sensor based on electrochemical principle is proposed in the paper. The principle of the sensor, the performance parameters of MCU, hardware architecture and experiment are introduced. The NEC microprocessor, which is low-power and high stability, is adopted as core processor. The three operational amplifiers same-phase parallel amplifying circuit not only matches the impendence of the pH combination electrode, but also eliminates the impact of wire resistance on pH measurement. The system's capacity of resisting disturbance is improved. Using 18-bit AD converter, which has programmable amplifier on chip, improves measurement accuracy. Both theoretical analysis and experimental results show the effectiveness of the pH sensor. A full description of the pH sensor and implementation are presented.
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A novel ranging method based on self-calibration principle is proposed in the paper. This method can be used in vehicle ranging to achieve accurate distance measurement. The principle of the method, hardware architecture and experiment... more
A novel ranging method based on self-calibration principle is proposed in the paper. This method can be used in vehicle ranging to achieve accurate distance measurement. The principle of the method, hardware architecture and experiment analysis are introduced. Self-calibration principle can eliminate the impact of the velocity of ultrasound on vehicle ranging. Plenty of experiments have been done to validate the design. Both theoretical analysis and experimental results show the effectiveness of the method. A full description of the method and implementation are presented.
