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Finite-time model-assisted active disturbance rejection control with a novel parameters optimizer for hypersonic reentry vehicle subject to multiple disturbances

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Aerospace science and technology 2018年 79卷 588-600页

作者： Yue Yu Honglun Wang Na Li Huiping Zhang Zikang Su Xingling Shao School of Automation Science and Electrical Engineering Beihang University Beijing 100191 China Science and Technology on Aircraft Control Laboratory Beihang University Beijing 100191 China Unmanned System Research Institute Beihang University Beijing 100191 China School of Automation Beijing Institute of Technology Beijing 100081 China Beijing Aerospace Automatic Control Institute Beijing 100854 China 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

In this paper, a scheme which combines finite-time model-assisted active disturbance rejection control and novel greedy criterion-based salp swarm algorithm is developed for attitude tracking problem of hypersonic reentry vehicle with multiple disturbances. To simplify control structure, the control scheme is designed within the framework of active disturbance rejection control completely. To lessen tuning parameters, a sigmoid function-based tracking differentiator is employed to generate a more realizable attitude transient profile instead of utilizing conventional nonlinear tracking differentiator. Taking known model information as model-assisted term, finite-time model-assisted extended state observers are constructed to estimate the lumped disturbance in attitude and angular rate loop with employment of function fal . To achieve rapid response and strong robustness, finite-time model-assisted control laws are derived by utilizing function fhan . Finally, a novel greedy criterion-based salp swarm algorithm is used to optimize control parameters in finite-time model-assisted control laws to achieve optimal solution that minimizes the tracking error and energy consumption. Comparative simulations are conducted to illustrate the effectiveness of the proposed scheme.

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Study on the performance of reinforced concrete blocks treated by styrene-acrylic emulsion

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Chemical Engineering Transactions 2018年 66卷 85-90页

作者： Zhu, Jing Zheng, Wenzhong Xie, Lili Wu, Yunqiang Zhang, Yongxin Fu, Junxiang Key Laboratory of Earthquake Engineering and Engineering Vibration Institute of Engineering Mechanics China Earthquake Administration Harbin150080 China College of Civil Engineering and Architecture Harbin University of Science and Technology Harbin150080 China Key Lab of Structures Dynamic Behavior and Control of the Ministry Education Harbin Institute of Technology Harbin150090 China

This paper introduces a method of improving the performance of reinforced concrete blocks and reveals the reinforcing effect of fibers. It is pointed out that the plant fibers treated by styrene-acrylic emulsion can effectively improve the interfacial bonding conditions, for the modified straw fibers which were treated by alkali processing and acrylic coating, their performance has been significantly improved, which is conducive to absorbing energy and improving the strength of the material. This paper focuses on introducing three types of reinforced concrete blocks, it’s known that the bridging effect can effectively prevent the development of micro cracks. The occurrence of cracks increases the macroscopic tensile strain of the material and increases the ductility and toughness of the matrix. Studying plant fiber reinforced blocks will help promote the application of this new wall materials. Copyright © 2018, AIDIC Servizi S.r.l.

关键词： Tensile strain

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Compressible effect on the cavitating flow:A numeric study

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Journal of Hydrodynamics 2017年第6期29卷 1089-1092页

作者：张伟柏晓东马峥陈刚 Yong Wang Science and Technology on Water Jet Propulsion Laboratory Marine Design and Research Institute of ChinaShanghai 200011China Ministry of Education Key Laboratory of Structural Dynamic Behavior and Control School of CivilEngineeringHarbin Institute of TechnologyHarbin 150090China China Ship Scientific Research Center Wuxi 214082China Max Planck Institute for Dynamics and Self-Organization Am Faflberg 17Gottingen 3 7077Germany

To understand the effect of the compressibility on the cavitating flow, a compressible, multiphase, single component Reynolds averaged Navier-Stokes（RANS） solver is used to study the cavitating flow on a wedge in the present work. A barotropic equation of status is used. A non-linear model for compressibility in the mixture is adopted to capture the effect of the compressibility within the complex cavitation bubbly mixtures. An unsteady cavitation phenomenon is found in the numerical simulation. The numerical results of local compressibility and Mach number in the bubbly mixture are given. The mechanism responsible for the unsteady shedding of the bubbly mixture is discussed based on the numerical results.

关键词： Cavitation compressibility barotropic flow

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Review and analysis on spalling critical temperature of concrete and fibers dosage to prevent spalling at elevated temperatures

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Jianzhu Jiegou Xuebao/Journal of Building Structures 2017年第1期38卷 161-170页

作者： Chen, Mingyang Hou, Xiaomeng Zheng, Wenzhong Wu, Bo Key Lab of Structures Dynamic Behavior and Control of China Ministry of Education Harbin Institute of Technology Harbin150090 China State Key Laboratory of Subtropical Building Science South China University of Technology Guangzhou510640 China

The principle of fire safety design is to ensure that concrete structures will not collapse or spall during fire and can be repaired after fire. There is important significance to research the spalling critical temperature of concrete without fibers or with lower fibers and rational fibers dosage to prevent spalling at elevated temperatures. The test results on fire-induced concrete spalling were analyzed. The relationship of spalling critical temperature and concrete cube compressive strength was obtained. Results show that the spalling critical temperature decreases with the increase of concrete compressive *** relationship of volume dosage of polypropylene (PP) fibers and steel fibers to prevent spalling and concrete compressive strength was obtained. The dosage of PP fibers increases linearly with the increase of concrete compressive strength, while the dosage of steel fibers increases with the increase of concrete compressive strength and the relationship can be expressed as an exponent *** is not safe to apply the recommendation in EN 1992-1-2: 2004 'Design of concrete structures: part 1-2: general rules: structural fire design' that the volume dosage 0.22% of PP fibers in concrete to prevent spalling. The proposed formula for fibers dosage will reduce the fire-induced spalling of concrete effectively. © 2017, Editorial Office of Journal of Building Structures. All right reserved.

关键词： Steel fibers

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Research on Output Characteristics Calculation Method of Micro-Magnetoelectric Generator

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Beijing Ligong Daxue Xuebao/Transaction of Beijing Institute of technology 2017年 37卷 198-201and206页

作者： Sui, Li Bian, Xin-Yuan Zhang, Li-Dan Su, Huai-Wei Shi, Geng-Chen Science and Technology on Electromechanical Dynamic Control Laboratory Beijing Institute of Technology Beijing100081 China

The small-sized magnetoelectric generator has many advantages such as high power density, small axial size, long-term storage, and good prospects for fuze power supply. The output performance of the magnetoelectric generator is influenced by the coil parameters and the magnetic circuit structure, and it is difficult to get the analytical model. In order to analyze the output performance of magnetoelectric generator theoretically, the output voltage of the generator by method of combining analytical derivation and simulation analysis can be otained. The magnetoelectric generator were designed and machined according to the calculation results. The experimental results of the output performance of the magnetoelectric generator show that the error between the theoretical analysis and experimental results is only 0.2%, which proves the rationality of the calculation method proposed in the present paper. © 2017, Editorial Department of Transaction of Beijing Institute of technology. All right reserved.

关键词： Magnetos

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Sigmoid function based integral-derivative observer and application to autopilot design

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Mechanical Systems and Signal Processing 2017年 84卷 113-127页

作者： Xingling Shao Honglun Wang Jun Liu Jun Tang Jie Li Xiaoming Zhang Chong Shen 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

To handle problems of accurate signal reconstruction and controller implementation with integral and derivative components in the presence of noisy measurement, motivated by the design principle of sigmoid function based tracking differentiator and nonlinear continuous integral-derivative observer, a novel integral-derivative observer (SIDO) using sigmoid function is developed. The key merit of the proposed SIDO is that it can simultaneously provide continuous integral and differential estimates with almost no drift phenomena and chattering effect, as well as acceptable noise-tolerance performance from output measurement, and the stability is established based on exponential stability and singular perturbation theory. In addition, the effectiveness of SIDO in suppressing drift phenomena and high frequency noises is firstly revealed using describing function and confirmed through simulation comparisons. Finally, the theoretical results on SIDO are demonstrated with application to autopilot design: 1) the integral and tracking estimates are extracted from the sensed pitch angular rate contaminated by nonwhite noises in feedback loop, 2) the PID(proportional-integral-derivative) based attitude controller is realized by adopting the error estimates offered by SIDO instead of using the ideal integral and derivative operator to achieve satisfactory tracking performance under control constraint.

关键词： Sigmoid function Integral-derivative observer Drift phenomena Chattering effect Singular perturbation Describing function Autopilot design

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

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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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