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A precision and low-cost non-contact sensor has been devised for steering wheel angle using a giant magnetoresistance (GMR) sensor. Detailed design scheme has been given for automobile steering wheel sensor, which scheme includes hardware circuit design, software design, and formula for computing absolute steering wheel angle. The algorithm feasibility is verified through MATLAB simulation. The devised...
The noise resistance is the key in the study of speech recognition technology, this paper proposed an improved Wiener filter combining with the new model of PUM. The model by using the modified Wiener filter to filter out of broadband noise, provides the PUM only partial band noise pollution of speech signal, makes up for the PUM does not apply to speech signal frequency band to be noise pollution...
The straight light path type optical current transformer is exposed to the magnetic field interference in the three-phase power system. In this paper the mathematical model of magnetic interference rate (MIR) of straight light path type optical current transformer was established, and the MIR characters of straight light path type optical current transformer were researched. The research showed that...
Due to the reversible properties of pump turbine, its operation along the "S" shape curve can lead to unstable operation, like remarkable unit frequency oscillation, under unload condition. To solve the problem, a robust non-fragile fractional order PID controller (FOPID) of pump turbine governing system is proposed in this paper. Furthermore, a combination of bacterial foraging algorithm...
The detection and identification of the kinds of ships, i.e., warship or merchant ship, is of great interest for military use. Ships are usually detected and recognized based on ship physical fields, and the commonly used ship physical fields include sound field, magnetic field, hydraulic pressure field, electric field, gravity field, etc, which all contain plenty of discriminative information. However,...
Temperature and humidity play important role in many industrial fields. To examine the relationship between these two parameters, a PC program was developed with the help of LabVIEW to acquire both temperature and humidity variations in real time. To reduce the system cost, a simple data acquisition card was employed in the aspect of hardware design. The developed program has a user-friendly interface...
The hardware-in-the-loop (HIL) simulation system of spacecraft attitude and orbit control has been studied. In this paper, the composing of the HIL system and the main functions of sub-systems are given. The method to determine the scaling ratio of a simulation system is introduced. A novel communication scheme is designed based on optical reflective fiber memory. The details to design a GNC/dynamic...
The security issues of smart grid have drawn more and more attention in the recent years. As a foundational part of smart grid, the cyber and physical security of advanced metering infrastructure (AMI) is of critical importance. Various securing solutions for AMI have been proposed, most of which based on cryptographic technology. However, as learned from experiences in IT environment, intrusion detection...
This paper introduces a kind of virtual logic analyzer based on FPGA for hardware circuit and LabVIEW graphical language for the host computer software. It focuses on the integration of the hardware, and data processing by software. The results of specific tests show that the virtual instrument has the characteristics of functional modularization, friendly interface, easy maintenance, lower cost and...
SIGSO (Slightly Inclined Geostationary-Satellite Orbit) satellite communication system has rich frequency resources. Spread spectrum communication can make up power constrained via frequency bandwidth, which can improve reliability and security of system. In this paper, we put forward a system structure and system resource management strategy and allocation method which is very suitable for SIGSO...
Monitoring of rotating machinery plays an essential role in industry. The basic software and hardware structure of the shaft vibration monitoring system of rotating machinery is introduced in this paper. The vibration signals caused by different reasons were analyzed. The national standard is based on vibration vibration velocity amplitude as the evaluation standard, but can not determine what is...
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