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A high efficiency, new-type embedded network controller based on ARM in the distributed control system is designed. It's used in various industrial control fields. It's very helpful to meet the needs of the system in real-time, reliability, low power consumption, etc. This paper designs the overall structure and the software and hardware scheme of the network controller. As the key, redundancy design...
The paper describes several model, where the computer-aided software design system BPsim.SD was used. Some of them were existing projects with available output data, and were used for system verification as the baseline deployments. Namely, the University Information System is the project of such kind, and has been developed earlier, partially by authors, who had all the initial data to be able to...
Considering characteristics of nuclear power plant digital instrumentation and control system, challenges of reliability assessment of digital instrumentation and control system are pointed out. As for its dynamic behavior and multi-states failure mode, limitation of traditional methods, research status and applicability of dynamic flowgraph methodology and other advance dynamic reliability assessment...
The traditional SPLL can't accurately track the frequency and phase of the grid voltage under the condition of unbalanced and seriously distorted three-phase voltage. To solve this problem, the novel SPLL model based on Sequence Decoupled Resonant (SDR) combined with Second Order Generalized Integrator (SOGI) is proposed. By using the technic of SDR and SOGI, this design successfully achieves the...
This paper develops a fuzzy critical chain method for resource conflict resolution in software projects scheduling. The method consists of developing a novel fuzzy estimation technique based on Delphi for activity duration, and adding the capacity constraint buffer between neighboring projects to deal with resource conflict. The size of the capacity constraint buffer is determined by computation with...
Compared to the single-robot system, the multi-robot system has more advantages and a broaden application aspect, and is becoming one of the hottest topics in Robotics. Furthermore, the simulation experiment is playing an important role in multi-robot system researches. This paper makes a good analysis and conclusion of the multi-robot system simulation software status quo, with an emphasis on the...
To reduce the energy consumption and save energy, this paper has finished the study on cement clinker burning process energy efficiency and realized the online estimation on key parameters of energy efficiency, such as coal calorific value, thermal efficiency and so on. For monitoring the real-time parameter, we have developed the energy efficiency analysis software. The software is based on the key...
The permanent magnet synchronous motor (PMSM) with high efficiency, high power factor, high control accuracy, high torque inertia, larger speed range and good torque smoothness, and a series of advantages, is playing a very important role in AC servo system. Based on vector control, a PI controller is designed to improve the control performance of permanent magnet synchronous motor. In order to realize...
The paper focuses on development and application of a software engineering system BPsim.SD, part of decision support suite BPsim.DSS, which greatly simplifies analysts work and their interaction with software developers. System is integrated into a decision support suite, which allows instant transition from software entities design to simulation of developed product with possible application of simulation...
After introducing difficulty of digital instrumentation and control system failure data estimation, it's pointed out not only random uncertainty, but also epistemic uncertainty of failure data should be addressed in a systematic way. Advantage, limitation and application status of traditional uncertainty analysis method, Bayesian theory based method, probability theory based method and two dimension...
This paper proposes a new intelligent reverse search car technology system suitable for large parking lots, using the latest research results which are NFC (Near Field Communication) technology and WIFI technology, combined with networking, Dijkstra improved algorithm, to achieve the precise positioning and fast reverse lookup the car. On the basis of reverse search technology, the software and hardware...
Equipment requirements development has great impact on the future war. First, the faults of the traditional requirements development method and the challenge faced with equipment requirements development are analyzed; then, the scenario-based equipment requirements development ideology is presented. Second, the complexity of equipment requirements system is analyzed to present the framework of equipment...
Parameters management and analysis are the basis for units running and revamping. They also provide scientific guidance for studying chemistries and dynamics of catalytic cracking reactions. So far, each FCC unit is in the status under dispersing management and lack of specified collection and management of parameters. Therefore, the parameters resource could not be shared among each other so as to...
With the fast development of the aerospace, the design and manufacture of landing gear are becoming hot topics nowadays. The development and application of the Virtual Prototyping Technology (VPT) have opened up a new field of the design and manufacture of the aircraft, the design, manufacture and test of the aircraft have made qualitative leaps in concept and method. Modeling and Simulation Techniques...
Inductively wireless power transmission technology is a new technology which uses electromagnetic resonance induction principle to transport energy within a certain distance. This paper studies principle and characteristics of inductively wireless power transmission and inductively wireless power transmission technology, making a comparison by collecting a variety of data and taking software simulation...
This paper presents a rapid and low-cost north-finder with error compensation (EC_North-Finder). An electronic compass is adopted as a core measuring unit and the steering mechanism of the instrument probe is adjusted through the translocation motor. Aiming at the influence of interference factors, a compensation algorithm which is based on the ellipse hypothesis is used in the calibration of electronic...
In recent years, many so called “robotic toys” appeared at the market. Though these devices are called toys and they are primarily intended for games, they provide a set of sensors and actuators that can be controlled from a computer. Hence these robotic devices may serve as non-expensive research tools, in particular for developing advanced software for controlling them. This paper describes a controller...
PLC is introduced into the ECM control system, which increases the ability, stability and automation of the device. But with the increasing number of peripheral equipments, it is harder to maintain the system. In the paper, ECM control system is proposed. The system includes three parts: upper system based on PC, PLC control system and servo control system. The three parts communicate with each other...
In order to achieve the signal acquisition and control requirements of engine system, this paper designs a kind of high-speed multi-channel data acquisition card, which is built with Altera Cyclone series FPGA EP1C12Q240C8N as the main control chip, using VHDL to realize the real-time acquisition and output control for high-speed multi-channel analog and switch quantity, then the card communicate...
As software and hardware have grown in functionality and complexity, the existing computer systems are confronting serious challenges with safety, dependability and reliability. Being one of the primary causes with responsibility for these challenges, the software-hardware interaction is advanced and widely studied in recent years. Unfortunately, none of the state-of-art researches has achieved widespread...
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