Applied Mechanics and Materials Vols. 347-350

Abstract: In this paper, we address the transmit angle and receive angle estimation problem for a bistatic multiple-input multiple-output (MIMO) radar. This paper links MIMO radar angle estimation problem to the compressed sensing trilinear model. Exploiting this link, it derives a compressed sensing trilinear model-based angle estimation algorithm, which can obtain automatically paired two-dimensional angle estimation. The proposed algorithm requires no spectral peak searching or pair matching, and it has better angle estimation performance than conventional algorithms including estimation of signal parameters via rotational invariance techniques (ESPRIT) algorithm. Simulation results illustrate performance of the algorithm.

Abstract: According to the limitations of desk microwave power measurement instruments used in system setup and product line field, a brand new minisize power measurement design based on USB interface is proposed. Firstly, the design principles of analog channel, digital signal processing and the USB interface for the power sensor is introduced. Then the design fundamental of the USB communication to the host is presented. The vivid implementation of the software on the DSP, USB firmware and the PC host is fully discussed. This design features small size, light weight and programmable USB interface, which supports the Interchangeable Virtual Instruments (IVI) driver and thus simplifies the program procedure. The PC based platform allows for lower cost than traditional power meters and power sensors, and with a laptop PC it is ideal for field portable power measurement and remote multi-channel monitoring applications using all kinds of USB hubs.

Abstract: In order to improve the kill efficiency of the fighter aircraft under the complex electromagnetic environment, the anti-interference capability of all kinds of dogfight weapon is analyzed, a method of the double dogfight weapon fusillade is adopted to improve the kill capability of fighter aircraft. This paper builds up the attacking efficiency models of dogfight weapon, and proposes the optimized plan of the combination of the dogfight weapons by comparing the attacking efficiency, and provides the theoretical method to improve the kill capability of the fighter aircraft under the complex electromagnetic environment.

Abstract: As the ageing of population is getting worse in China, both people and society pay more attention to the support and nursing of the elderly, establishing many gerocomium and monitoring system for the elderly. The monitoring system mainly focuses on the real-time monitoring, however, it is still not accurate and promptly enough in aspects of nursing, quick response, and fixed position accuracy. In order to reduce nursing accidents of the elderly, the semi-active radio frequency identification (RFID) technology has been utilized in the monitoring and positioning system. The tracking and monitoring system of gerocomium has been built based on the idea of the Internet of Things Engineering, realizing the function of quick fixed position, active help-seeking, basic information management, and information processing of activities of the elderly. Therefore, in the real-time monitoring system, problems like inaccurate positioning, slow response, and delay of nursing and assisting the elderly are properly solved.

Abstract: Phase shift laser range finder, as a large-scale, high-precision measurement method, is widely used in industrial and military fields. The traditional laser range finder can not meet the need of real-time, high resolution measurement because of its low anti-jamming capability and time-consuming measurement. Owing to this, multi-channel transmitting and receiving system for phase shift laser range finder based on parallel DSP was designed. Multi-frequency modulation laser can be transmitted and received at the same time, improving the measurement speed and avoiding the wrong data fusion because of target moving. The distance was got by measuring the phase difference between the measurement signal and reference signal, and the Doppler velocity of the target is got by measuring the measurement signals frequency, The measurement signals reference signals were acquired by parallel AD convertors, the phase difference between them was calculated adopting all-phase FFT(apFFT). A new frequency correction method was proposed according to the amplitude spectrum acquired by apFFT, Amplitude spectrum is expanded into Taylor series and the correction value of frequency is calculated by relationship of spectrum lines. Monte Carlo simulation results proved that the new frequency correction method had higher resolution and better stability than Rife method and centro-baric method. The experiments is implemented on a precision guide of 3m-long, on the condition that the sampling frequency of AD converter is 937.5KHz, the apFFT transform point number is 4096, distance and velocity results can be obtained each 10ms, experiments prove that the distance measurement standard deviation better than 0.09mm and the velocity measurement standard deviation better than 0.022m/s are obtained. The system can meet the need of high accuracy ,real-time distance measurement of moving target.

Abstract: In the control process of trajectory correction projectile, a real-time accurate measurement of projectile roll angle information is required. Geomagnetic and GPS measurement principle is applied for the establishment of the projectile measured roll angle combinations mathematical calculation model, the designing of MR and GPS measuring circuits, and derivation of the singular points of the system and error resolution type. Numerical simulation methods are applied to verify the location of singular points of the combination of measurements and the linear spline combination of interpolation method of compensation the position of the magnetic vector error and the ellipsoid fitting calibration algorithm compensate for magnetic measurement error. The geomagnetic error has less effects on the combination of measured roll angle error, while the pitch angle and yaw angle error has greater impact on the roll angle error. Remove the singular point area, projectile roll angle error is less than 2°when measured by the combination of MR / GPS .

Abstract: Radar network is a typical complex adaptive system (CAS). The command and control (C2) of radar network plays a big part in improving the quality of the acquired data and the anti-damage ability of radar network. On the basis of analyzingradar networkcombat process,a method based on Agent was proposed to establish command and control (C2) modelof radar network.The structure of the Agent was put forward and based on that, theadaptive C2 model was represented as a 6-tuple system.The simulation experimentwas made in the presumed background and the results showed that the modeling of adaptive command and control of radar network was implemented.

Abstract: In order to provide efficient and suitable services for users in a ubiquitous computing environment, many kinds of context information technologies have been researched. Wireless sensor networks are among the most popular technologies providing such information. Therefore, it is very important to guarantee the reliability of sensor data gathered from wireless sensor networks. However there are several factors associated with faulty sensor readings which make sensor readings unreliable. The research put forward classifying faulty sensor readings into sensor faults and measurement errors, then propose a novel in-network data calibration algorithm which includes adaptive fault checking, measurement error elimination and data refinement. The proposed algorithm eliminates faulty readings as well as refines normal sensor readings and increase reliability. The simulation study shows that the in-network data calibration algorithm is highly reliable and its network overhead is very low compared to previous works.

Abstract: In this paper, the extensive application of audio testing software to Chinese musicology was reviewed. New audio testing software developed by Chinese musicologists include DEAM and GMAS , which along with imported audio testing software such as Solo Explore 1.0, Speech Analyzer3.0.1 have been widely applied by Chinese musicologists to ethnomusicology, archeology of music, folk music as well as musical entertainment. With the support of audio testing software, Chinese musicology has made much progress.

Abstract: A cross-platform software application was developed to manage energy generation and consumption intelligently in smart homes. The system model consists of domestic loads, household distributed energy resources and an energy storage component that supports scheduled charging/discharging. The software deals with all these electrical devices as well as their energy information, based on which real-time conditions are presented to the resident and the history can be queried. Whats more, the application fulfills kinds of energy profiling and pricing-related optimization on account of demand response, resulting more monetary benefits and comforts. The software interacts smartly with energy owners by graphical user interface (GUI) and enables an intelligent electricity usage pattern in the context of smart power consumption within the framework of smart grid.