A Method for Real-Time Radar Signal Main Sorting

2013 ◽  
Vol 760-762 ◽  
pp. 567-571
Author(s):  
Hong Chao Wu ◽  
Wei Hua Xiao ◽  
Jian Feng Pu
Keyword(s):  
Real Time ◽  
Pulse Sequence ◽  
High Accuracy ◽  
Radar Signal ◽  
Sorting Algorithm ◽  
The Real ◽  
Sorting Algorithms ◽  
Key Technologies ◽  
Simulation Results ◽  
Sequence Simulation

The real-time radar signal sorting is one of the key technologies for electronic reconnaissance, first analyzes the defects of traditional main sorting algorithms, and then proposes a comprehensive main sorting algorithm. The method first uses the SDIF algorithm to sort PRI fixed and PRI stagger radar signal, then uses dynamic expansion association method to search PRI jitter radar signal. When using the SDIF algorithm, in order to improve the efficiency of extraction of PRI, first taking amplitude pretreatment, then only accumulate the signals whose amplitude meet certain requirements. After extracting PRI, extract to the original full pulse sequence. Simulation results show that the method of sorting has high accuracy and good real-time.

Real-time engine model development based on time complexity analysis

2021 ◽  
pp. 146808742110397
Author(s):  
Haotian Chen ◽  
Kun Zhang ◽  
Kangyao Deng ◽  
Yi Cui
Keyword(s):  
Real Time ◽  
Time Complexity ◽  
Complexity Analysis ◽  
High Accuracy ◽  
The Real ◽  
Cycle Simulation ◽  
Crank Angle ◽  
Time Requirements ◽  
Improved Model ◽  
Simulation Time

Real-time simulation models play an important role in the development of engine control systems. The mean value model (MVM) meets real-time requirements but has limited accuracy. By contrast, a crank-angle resolved model, such as the filling -and-empty model, can be used to simulate engine performance with high accuracy but cannot meet real-time requirements. Time complexity analysis is used to develop a real-time crank-angle resolved model with high accuracy in this study. A method used in computer science, program static analysis, is used to theoretically determine the computational time for a multicylinder engine filling-and-empty (crank-angle resolved) model. Then, a prediction formula for the engine cycle simulation time is obtained and verified by a program run test. The influence of the time step, program structure, algorithm and hardware on the cycle simulation time are analyzed systematically. The multicylinder phase shift method and a fast calculation method for the turbocharger characteristics are used to improve the crank-angle resolved filling-and-empty model to meet real-time requirements. The improved model meets the real-time requirement, and the real-time factor is improved by 3.04 times. A performance simulation for a high-power medium-speed diesel engine shows that the improved model has a max error of 5.76% and a real-time factor of 3.93, which meets the requirement for a hardware-in-the-loop (HIL) simulation during control system development.

Design of High Accuracy Robot Welding Machine for a Cone Bottom

2014 ◽  
Vol 496-500 ◽  
pp. 1289-1292
Author(s):  
De Huan Tang ◽  
De Yang Luo
Keyword(s):  
Real Time ◽  
Tracking System ◽  
High Accuracy ◽  
Welding Robot ◽  
Robotic Welding ◽  
High Quality ◽  
The Real ◽  
Laser Tracking ◽  
Welding Machine

This paper designed a special welding machine for an aluminum cone bottom workpiece. This machine contains highly accurate positioner system, laser tracking system, and robotic welding devices. It is used to weld the transverse seams and the longitudinal seams of the workpiece. The interaction of welding robot with positioner and the real-time seam correcting can ensure high quality of welding.

Real Time Observation of SiC Oxidation Using an In Situ Ellipsometer

2006 ◽  
Vol 527-529 ◽  
pp. 1031-1034 ◽  
Author(s):  
K. Kakubari ◽  
R. Kuboki ◽  
Yasuto Hijikata ◽  
Hiroyuki Yaguchi ◽  
Sadafumi Yoshida
Keyword(s):  
Real Time ◽  
Rate Constants ◽  
Oxidation Rate ◽  
Oxide Thickness ◽  
High Accuracy ◽  
Oxidation Time ◽  
The Real ◽  
Time Observation ◽  
Real Time Observation

Real time observation of SiC oxidation was performed using an in-situ ellipsometer over the temperature range from 900°C to 1150°C. The relations between oxide thickness and oxidation time were obtained precisely by virtue of the real time measurements. We analyzed the relations between oxide thickness and oxidation time by applying the Deal and Grove model to obtain the linear and parabolic rate constants. Taking advantage of in-situ measurements, we successfully obtained the oxidation rate constants with high accuracy.

scholarly journals Sliding wire detection system of electric lock screw tool based on motor characteristics

2021 ◽  
Vol 2137 (1) ◽  
pp. 012009
Author(s):  
Ning Zhang ◽  
Yinxin Yan ◽  
Houcheng Yang ◽  
Zhangsi Yu
Keyword(s):  
Real Time ◽  
Detection System ◽  
Low Cost ◽  
High Sensitivity ◽  
High Accuracy ◽  
Normal Operation ◽  
Automatic Assembly ◽  
The Real ◽  
Current Change ◽  
Real Time Detection

Abstract This paper presents a sliding wire detection system of electric screw locking tool based on the characteristics of motor. The system can judge whether the screw has sliding wire through the current change of motor during normal operation, and realize the real-time detection and alarm of sliding wire. The system has the advantages of high sensitivity, low cost and high accuracy. It can be widely used in automatic assembly and other fields.

An Improved SDIF Radar Pulse Signal Main Sorting Algorithm

2013 ◽  
Vol 710 ◽  
pp. 637-641 ◽  
Author(s):  
Wei Hua Xiao ◽  
Hong Chao Wu ◽  
Cheng Zhi Yang ◽  
Mei Ling Wang
Keyword(s):  
Real Time ◽  
Pulse Signal ◽  
Radar Signal ◽  
Sorting Algorithm ◽  
Histogram Method ◽  
Transform Method ◽  
Sorting Method ◽  
The Poor ◽  
The Difference ◽  
Difference Histogram

In repetition frequency sorting method, sorting capability of the sequence of the difference histogram method (SDIF) to the PRI jitter radar pulses is poor. Although the PRI transform method can sort PRI jitter radar signal, the amount of computation overlarge is difficult to meet the demand for real-time sorting. Because of the poor sorting capability of SDIF algorithm to jitter PRI, this paper presents an improved algorithm of SDIF, sorts PRI jitter radar signal well, can meet the needs of real-time sorting.

A Research on Suppression of SSO Based on the Real Time Digital Simulation

2013 ◽  
Vol 732-733 ◽  
pp. 1415-1419 ◽  
Author(s):  
Chun Lin Guo ◽  
Jian Ting Xu ◽  
Yang Zhao ◽  
Xiang Ning Xiao
Keyword(s):  
Real Time ◽  
Digital Simulation ◽  
Operation Mode ◽  
System Model ◽  
The Real ◽  
Model Based ◽  
Operation Modes ◽  
Simulation Results

According to the first project using SVC to mitigate SSO in China, this paper builds the system model based on real time digtal simulator,and gives an introduction to the sysem model. Under typical operation mode and fault conditions,the performance of SVC is fully validated,it also analysis and comparise the performance of SVC under different operation modes. Simulation results show that the SVC can mitigate the SSO phenomenon.

The Application of the Complex Modulation Zoom-FFT Based on Complex Analytical Bandpass Filter in Interhamonic Detection of Power System

2011 ◽  
Vol 354-355 ◽  
pp. 1012-1015
Author(s):  
Ya Mei Liu ◽  
Hong Geng Yang ◽  
Lan Fang Li
Keyword(s):  
Theoretical Analysis ◽  
Power System ◽  
Real Time ◽  
Spectrum Analysis ◽  
Bandpass Filter ◽  
The Real ◽  
Simulation Results ◽  
Real Time Detection ◽  
Complex Modulation

Interharmoics are the signals whose frequencies are between two harmonics. Besides the usual characterics of the harmonics, interharmonics will influence the present harmonic compensating equipment, and then result in failure compensation. Therefore, precise detection of interharmonics is very important and significant. Complex modulation Zoom-FFT (ZFFT) based on complex analytical bandpass filter is introduced in the real-time detection of the power system. Contrasting to the traditional zoom spectrum algorithms, the proposed algorithm is more suitable in the intensive spectrum analysis. Detailed theoretical analysis and simulation results are presented. The effectiveness of this algorithm is verified.

Real-Time Attitude Simulation of Aerocraft Using dSPACE Emulator and Three-Axis Turn Table

2012 ◽  
Vol 187 ◽  
pp. 15-19
Author(s):  
Dao Cheng Xie ◽  
Zhong Wei Wang ◽  
Qing Hua Zeng
Keyword(s):  
Real Time ◽  
Dynamic Model ◽  
Digital Simulation ◽  
Hardware In The Loop ◽  
Serial Port ◽  
Velocity Data ◽  
Simulation Data ◽  
Key Technologies ◽  
Hardware Configuration ◽  
Simulation Results

To solve the problem of ground simulation of aerocraft attitude in hardware-in-the-loop simulation (HILS), recurrence of aerocraft attitude is realized using dSPACE emulator and three-axis turn table. The hardware configuration and key technologies of control system are introduced. Construction and downloading of the dynamic model is done in dSPACE monitor computer, the model is calculated in dSPACE emulator. The communication between dSPACE and turn table is settled with serial-port of DS4201s card. The rotate motion of the inner middle and outer axis correspond to the three-channel motion of the aerocraft body. Simulation results indicate that dSPACE finish calculating complicated dynamic model, sending and receiving velocity data through serial-port is proper, bandwidth of turn table satisfies the need of simulation. Real rotating velocity of turn table is displayed using Controldesk tools, and fits well with the digital simulation data in pitching yawing and rolling directions, and the need for real-time attitude simulation in HILS is satisfied.

ACO-Based Global Optimal Transportation Path

2012 ◽  
Vol 488-489 ◽  
pp. 1680-1683
Author(s):  
Wei Hua Zhu ◽  
Ying Shen
Keyword(s):  
Ant Colony Optimization ◽  
Real Time ◽  
Shortest Path ◽  
Real Life ◽  
Optimal Transportation ◽  
Time Analysis ◽  
The Real ◽  
Real Time Analysis ◽  
Global Optimal ◽  
Simulation Results

This paper discusses how to address some issues when contemplating the global optimal transportation path (GOTP) such as dynamics, the ability of real-time analysis as well as complexity of prediction. Using shortest path methodology, this paper abstracts the real-life problem to a graphic context. Based on the solution of ant colony optimization (ACO) algorithm, the simulation indicates that this manner is efficient and effective in dealing with these problems. The indicators utilized ACO are achieved through simulation results analysis, providing the range of exact elements.

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