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Research on GPS-only navigation and guidance for course-correction fuze

International Journal of Earth sciences and Engineering 2016年第3期9卷 1314-1318页

作者： Luo, Xiaolin Li, Dongguang Science and Technology on Electormechanical Dynamic Control Laboratory Beijing Institute of Technology Beijing100081 China Mechanic and Electronic Engineering North University of China Tai yuan030051 China

In the military science of ballistics, circular error probable (CEP) is a measure of a weapon system's precision. The problem is how to calculate the CEP included measurement noise, and process noise, a Kalman filter with model replacement, and a simple navigation and control algorithms. Using an augmented state formulation, covariance techniques were used to determine the variances of CEP, The linear covariance analysis proved to be a very useful and fast analysis tool for the preliminary guidance navigation system design and analysis. © 2016 CAFET-INNOVA TECHNICAL SOCIETY. All rights reserved.

关键词： Global positioning system

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Damage Detection for SMC Benchmark Problem: A Subspace-Based Approach

Damage Detection for SMC Benchmark Problem: A Subspace-Based...

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作者： Zhou, Wensong Li, Shunlong Li, Hui Key Laboratory of Structures Dynamic Behavior and Control of the Ministry of Education Harbin Institute of Technology Harbin150090 China School of Transportation Science and Engineering Harbin Institute of Technology Harbin150090 China Key Laboratory of Advanced Material and Intelligent Control Technology on Transportation Safety Harbin Institute of Technology Harbin150090 China

A full-scale bridge benchmark problem was issued by the Center of Structural Monitoring and control at the Harbin Institute of technology. The data used in this problem were collected by an in situ structural health monitoring system implemented into a full-scale cable-stayed bridge before and after the bridge was damaged, which is very rare in structural health monitoring field. This benchmark problem will help to verify and/or make comparison of the condition assessment and the damage detection methods, which are usually validated by numerical simulation and/or laboratory testing of small-scale structures with assumed deterioration models and artificial damage. With respect to damage detection of girder, one of the benchmark problems, using the monitored and field testing acceleration data, this paper describes a damage detection method, based on a residual generated from a subspace-based covariance-driven identification method, to detect the damage, and give relative quantitative damage indexes. This method was applied on both two parts of the given benchmark problem, and then detailed discussions and results on this problem are reported in this paper. © 2016 World Scientific Publishing Company.

关键词： Damage detection

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MEMS Gyro Random Error On-line Modeling Based on Recursive Least-Squares Method of System Identification

MEMS Gyro Random Error On-line Modeling Based on Recursive L...

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2016 2nd Workshop on Advanced Research and technology in Industry Applications(WARTIA 2016)

作者： Jiawei Wang Keyu Qi Kai Shi Ke Liang Jie Yan Northwestern Polytechnical University Science and Technology on Electromechanical Dynamic Control Laboratory

To develop the guided projectile with higher hit precision,promotes gyro’s performance has immensely affection on trajectory *** to the difficulty in method of MEMS angular rate gyro random error on-line modeling,this paper proposes a new algorithm of recursive least-squares method that used in the system identification *** this recursive least-squares method,a few known gyro output data are used to roughly estimate system parameters,then newly obtained data are added to the measurement formula using the recursive algorithm in order to make estimated parameters approach to its *** study indicates that the residual error between outputs of gyro random error model and outputs of real gyro highly approximates white noise,which means the error model accurately describes statistical features of gyro random error and the recursive algorithm realizes on-line modeling.

关键词： Gyro Random Error On-line Modeling System Identification Recursive Least-Squares Method

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High-speed Target Recognition Algorithm and Simulation

High-speed Target Recognition Algorithm and Simulation

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International Conference on Industrial technology and Management science(ITMS 2015)

作者： Shuai Duan Jiahao Deng School of Mechatronical Engineering Beijing Institute of Technology Science and Technology on Electromechanical Dynamic Control Laboratory

The purpose of this paper is devoted to finding a method to recognize the high-speed target for missile in a certain distance. Based on the quasi-electrostatic field characteristics of the capacitance detector, this paper analyzed the output voltage of detection circuit from a capacitance detector. It can be found that, when a high-speed target getting close to the detector, the output voltage of detection circuit changes with certain rules. Our research applied a low-speed static test to obtain the static characteristic data of the target, proposed a high-speed target recognition algorithm and set threshold values based on starting voltage, second derivative and signal duration. The result showed that the algorithm is effective to recognize high-speed missile target.

关键词： quasi-electrostatic field high-speed target recognition capacitance detector algorithm

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Alumina Ceramic Based High-Temperature Performance of Wireless Passive Pressure Sensor

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Photonic Sensors 2016年第4期6卷 328-332页

作者： Bo WANG Guozhu WU Tao GUO Qiulin TAN School of Computer Science and Control Engineering North University of China Taiyuan 030051 China Key Laboratory of Instrumentation Science & Dynamic Measurement Ministry of Education North University of China Taiyuan 030051 China Science and Technology on Electronic Test and Measurement Laboratory North University of China Taiyuan 030051 China

A wireless passive pressure sensor equivalent to inductive-capacitive （LC） resonance circuit and based on alumina ceramic is fabricated by using high temperature sintering ceramic and post-fire metallization processes. Cylindrical copper spiral reader antenna and insulation layer are designed to realize the wireless measurement for the sensor in high temperature environment. The high temperature performance of the sensor is analyzed and discussed by studying the phase-frequency and amplitude-frequency characteristics of reader antenna. The average frequency change of sensor is 0.68 kHz/℃ when the temperature changes from 27℃ to 700℃ and the relative change of twice measurements is 2.12%, with high characteristic of repeatability. The study of temperature-drift characteristic of pressure sensor in high temperature environment lays a good basis for the temperature compensation methods and insures the pressure signal readout accurately.

关键词： Pressure sensor wireless passive high temperature zero drift resonant frequency

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A method to quickly predict dispersion for impact point of high spin rate projectile

A method to quickly predict dispersion for impact point of h...

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2015 Joint International Mechanical,Electronic and Information technology Conference(JIMET 2015)

作者： Xiao-lin Luo Science and Technology on Electormechanical Dynamic Control Laboratory Beijing Institute of Technology

ISBN: (纸本)9781510817982

A method for real time in flight prediction of the ground impact point and dispersion of indirect fire projectiles is investigated. A three degree of freedom projectile model solution is used to be determined the total dispersion of trajectory. With the root mean square method, mean point of impact error(MPI) of projectile is simulation. the final simulation verifies that the method proposed is use for determined the total dispersion of trajectory.

关键词： Precision Error Mean Point of Impact Error Monte Carlo analysis The Root Mean Square Method

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On two asymmetry wake patterns behind two side-by-side square cylinders

On two asymmetry wake patterns behind two side-by-side squar...

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第二届全球华人水动学学术会议

作者： Wei Zhang Xiaodong Bai Science and Technology on Water Jet Propulsion Laboratory Marine design and research institute of China Ministry of Education Key laboratory of Structural Dynamic Behavior and Control School of Civil EngineeringHarbin Institute of Technology

Several asymmetric wake patterns are discovered for flow behind two side-by-side circle *** present work extends previous researches to study flow behind two side-by-side square cylinders with focus on two types of asymmetric wake flow,namely deflected oscillatory wake and flip-flop,which are believed to be of the same *** combination of the direct numerical simulation by lattice Boltzmann method(DNS-LBM) and the state-of-art dynamic mode decomposition(DMD) is used to explore the underlying physics of the *** types of asymmetric wake patterns are presented in the wake like the wake of a pair of circle *** is confirmed that the deflection of the wake is not of Coanda ***,the dynamic modes of the flows are extracted from the numerical *** comparing the corresponding modes,it is found here the two types of flow are of different mechanism.

关键词： Wake flow pattern Side-by-side cylinder DMD DNS-LBM

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Optimization of quadrature error correction method for silicon MEMS gyroscopes

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Guangxue Jingmi Gongcheng/Optics and Precision Engineering 2016年第1期24卷 134-142页

作者： Cao, Hui-Liang Wang, Yu-Liang Shi, Yun-Bo Shen, Chong Li, Hong-Sheng Liu, Jun Yang, Zhi-Cai Science and Technology on Electronic Test & Measurement Laboratory North University of China Taiyuan030051 China Key Laboratory of Instrumentation Science and Dynamic Measurement of the Ministry of Education North University of China Taiyuan030051 China Beijing Institute of Aerospace Control Devices Beijing100094 China School of Instrument Science and Engineering Southeast University Nanjing210096 China

This paper focuses on finding out a optimum quadrature error correction method for a dual-mass Micro-electro-mechanical System (MEMS) gyroscope with quadrature error correction combs and sense feedback combs. The structure of the gyroscope was introduced, and influences of quadrature errors on the output signals were simulated and quantized. The results show that quadrature error equivalent angular rate is 200(°)/s and the demodulation phase error is less than 2°, which generates 15(°)/s variation of output signal. Three kinds of quadrature error correction methods used commonly in measuring this structure were investigated, and they are Charge Injecting Method (CIM), Quadrature Force Correction Methods (QFCM) and Quadrature Coupling Stiffness Correction Method (QCSCM). The feasibility of the three method was verified in theory. A gyroscope without quadrature error correction was tested, the results show that the quadrature signal peak-peak amplitudes from left and right mass preamplifiers are 150 mV and 300 mV respectively. Then, the correction method based on left mass and right mass independently was proposed. The the experiments based on CIM, QFCM and QCSCM were performed. The results show that the quadrature error signals are eliminated basically, their bias values and bias stabilities are -8.361(°)/s and 423(°)/h, 2.419(°)/s and 82(°)/h, 1.751(°)/s and 25(°)/h, respectively. According to the results, the QCSCM is verified to be the optimal method for quadrature error correction, and the theory analysis result is correct. © 2016, science Press. All right reserved.

关键词： Silicon

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Flexible piezoelectric wind energy generator

Flexible piezoelectric wind energy generator

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2015 4th International Conference on Computer, Mechatronics, control and Electronic Engineering (ICCMCEE 2015)

作者： Wang Pengyingkai Sui Li Liu Guohua Shi Gengchen Science and technology on Electromechanical Dynamic Control Laboratory Beijing Institute of Technology

ISBN: (纸本)9781510813465

This paper proposes the scheme of a flexible piezoelectric generator. The generator using direct piezoelectricity of PVDF, can covert wind power to charge output. It possesses such advantages as: light, small-sized and better flexibility. Using FEA method, this paper carries out modal analysis and harmonic response analysis for the generator. From the modal analysis results, we get the generator's the first for modal are 6.95 Hz, 43.51 Hz, 76.06 Hz and 122.84 Hz. From harmonic response analysis results, we get the amplitude-frequency characteristic curve of the generator's output voltage, and the results show that the generator will generate higher voltage when it vibration in second-order than first –order. In order to verify the accuracy of simulation, a series experiments are carried out. Simulation and experiment on the generator proved the reliability in the wind and shows the excellent quality of generating electric energy.

关键词： Piezoelectric generator Wind Flexible FEA method

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Back-stepping robust trajectory linearization control for hypersonic reentry vehicle via novel tracking differentiator

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Journal of the Franklin Institute 2016年第9期353卷 1957-1984页

作者： Xingling Shao Honglun Wang Key Laboratory of Instrumentation Science & Dynamic Measurement Ministry of Education North University of China Taiyuan 030051 China National Key Laboratory for Electronic Measurement Technology School of Instrument and Electronics North University of China Taiyuan 030051 China School of Automation Science and Electrical Engineering Beihang University Beijing 100191 China Science and Technology on Aircraft Control Laboratory Beihang University Beijing 100191 China

This paper proposes a back-stepping robust trajectory linearization control (TLC) design for hypersonic reentry vehicle (HRV) attitude tracking problem from a novel tracking differentiator perspective. First, the attitude kinematics and dynamics for HRV is formulated and rewritten in feedback form with mismatched and matched uncertainties introduced by variations of various aerodynamic coefficients . Second, a sigmoid function based novel tracking differentiator (STD) with global fast convergence property , simple structure and chattering-free in differential estimation is developed to handle the “explosion of term” problem in back-stepping TLC design. In addition, dynamical performance and noise-attenuation ability of STD are analyzed in frequency domain by describing function method. Third, how to convert between sigmoid function based disturbance observer (SDO) and STD is given, and based on the estimates of uncertainties provided by SDO in attitude and angular rate loop, the back-stepping robust TLC is synthesized to track the respective commands in dual-loop. Then, the stability of the composite SDO-enhanced back-stepping TLC approach is established. Finally, extensive simulation results are presented to demonstrate the effectiveness of the proposed control strategy in improving disturbance attenuation ability and performance robustness against multiple uncertainties.

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