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Nonlinear dynamic analysis for elastic robotic arms

H. KORAYEM, H. N. RAHIMI

Frontiers of Mechanical Engineering 2011, Volume 6, Issue 2,   Pages 219-228 doi: 10.1007/s11465-011-0218-y

Abstract: presented and the simulation is carried out to investigate the role of robot dynamic modeling in the control

Keywords： robotic arms     elastic link     elastic joint     nonlinear dynamics     optimal control    

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H∞ control in the frequency domain for a semi-active floor isolation system

Yundong SHI, Tracy C BECKER, Masahiro KURATA, Masayoshi NAKASHIMA

Frontiers of Structural and Civil Engineering 2013, Volume 7, Issue 3,   Pages 264-275 doi: 10.1007/s11709-013-0214-x

Abstract: Semi-active control with an control was adopted for the floor isolation system and a new input shapingPassive control using an oil damper was also tested for comparison.The test results show that the control effectively reduced acceleration for short period motions withThe control algorithm proved to be more advantageous than passive control because of its capacity toadjust control strategies according to the different motion frequency characteristics.

Keywords： semi-active     floor isolation     H∞ control     MR damper     shaping filter     shaking table    

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Trajectory planning of mobile robots using indirect solution of optimal control method in generalized

NAZEMIZADEH, H. N. RAHIMI, K. AMINI KHOIY

Frontiers of Mechanical Engineering 2012, Volume 7, Issue 1,   Pages 23-28 doi: 10.1007/s11465-012-0304-9

Abstract:

This paper presents an optimal control strategy for optimal trajectory planning of mobile robots byThen, the optimal path planning of the mobile robot is formulated as an optimal control problem.To solve the problem, an indirect solution of the optimal control method is employed, and conditions

Keywords： mobile robot     trajectory planning     nonlinear dynamic     optimal control    

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Full-band error control and crack-free surface fabrication techniques for ultra-precision fly cutting

H. ZHANG, S. F. WANG, C. H. AN, J. WANG, Q. XU

Frontiers of Mechanical Engineering 2017, Volume 12, Issue 2,   Pages 193-202 doi: 10.1007/s11465-017-0448-8

Abstract:

Large-aperture potassium dihydrogen phosphate (KDP) crystals are widely used in the laser path of inertial confinement fusion (ICF) systems. The most common method of manufacturing half-meter KDP crystals is ultra-precision fly cutting. When processing KDP crystals by ultra-precision fly cutting, the dynamic characteristics of the fly cutting machine and fluctuations in the fly cutting environment are translated into surface errors at different spatial frequency bands. These machining errors should be suppressed effectively to guarantee that KDP crystals meet the full-band machining accuracy specified in the evaluation index. In this study, the anisotropic machinability of KDP crystals and the causes of typical surface errors in ultra-precision fly cutting of the material are investigated. The structures of the fly cutting machine and existing processing parameters are optimized to improve the machined surface quality. The findings are theoretically and practically important in the development of high-energy laser systems in China.

Keywords： ultra-precision fly cutting     large-aperture KDP crystals     spatial frequency     processing error    

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Minimax Q-learning design for H∞ control of linear discrete-time systems Research Articles

Xinxing LI, Lele XI, Wenzhong ZHA, Zhihong PENG,lixinxing_1006@163.com,xilele.bit@gmail.com,zhawenzhong@126.com,peng@bit.edu.cn

Frontiers of Information Technology & Electronic Engineering 2022, Volume 23, Issue 3,   Pages 438-451 doi: 10.1631/FITEE.2000446

Abstract: The proposed method, which employs off-policy , learns the optimal control policies for the controllerWe prove that the method converges to the saddle solution under initially admissible control policies

Keywords： H∞ control     Zero-sum dynamic game     Reinforcement learning     Adaptive dynamic programming     Minimax Q-learning    

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Event-based H∞ control for piecewise-affine systems subject to actuator saturation Research Articles

Yonghao Jiang, Wei Wu, Xuyang Lou, Zhengxian Jiang, Baotong Cui,y.h.jiang@foxmail.com,weiwu@jiangnan.edu.cn

Frontiers of Information Technology & Electronic Engineering 2021, Volume 22, Issue 5,   Pages 615-766 doi: 10.1631/FITEE.1900601

Abstract: We deal with event-triggered controller design for discrete-time s subject to . By considering saturation information, a novel event-triggered strategy is proposed to conserve communication resources. A based condition is derived based on a piecewise Lyapunov function. This condition guarantees the stability of the closed-loop system with a certain index and reduces the number of transmitted signals. Numerical examples are given to show the efficiency of our method.

Keywords： 事件触发控制；分段仿射系统；线性矩阵不等式；执行器饱和；H∞性能    

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Impact of wind power generating system integration on frequency stabilization in multi-area power system with fuzzy logic controller in deregulated environment

BHATESHVAR,H. D. MATHUR,H. SIGUERDIDJANE

Frontiers in Energy 2015, Volume 9, Issue 1,   Pages 7-21 doi: 10.1007/s11708-014-0338-2

Abstract: The proposed control strategy suggests a substantial contribution to system inertia in terms of short-termThe control scheme uses fuzzy logic based design and takes frequency deviation as input to provide quickconditions are also analyzed in simulation studies for the same power system model with the proposed controlSimulation results advocates the justification of control scheme over other schemes.

Keywords： two area power system     automatic generation control     wind power generating system (WPGS)     deregulated environment    

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reference tracking control design for a class of nonlinear systems with time-varying delays

Mei-qin LIU,Hai-yang CHEN,Sen-lin ZHANG

Frontiers of Information Technology & Electronic Engineering 2015, Volume 16, Issue 9,   Pages 759-768 doi: 10.1631/FITEE.1500053

Abstract: This paper investigates the trajectory tracking control for a class of nonlinear systems with timevaryingFirst, the definition of the tracking control is given.A scaling factor is introduced to deal with the disturbance such that the control precision is improvedFinally, a CSTR system is provided to demonstrate the effectiveness of the established control laws.

Keywords： H∞     reference tracking     Nonlinear system     State feedback control     Time-varying delays     Unified model    

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A pre-compensation method of the systematic contouring error for repetitive command paths

H. CHEN,Y. P. CHEN

Frontiers of Mechanical Engineering 2015, Volume 10, Issue 4,   Pages 367-372 doi: 10.1007/s11465-015-0367-5

Abstract:

For a repetitive command path, pre-compensating the contouring error by modifying the command path is practical. To obtain the pre-compensation value with better accuracy, this paper proposes the use of a back propagation neural network to extract the function of systematic contouring errors. Furthermore, by using the extracted function, the contouring error can be easily pre-compensated. The experiment results verify that the proposed compensation method can effectively reduce contouring errors.

Keywords： contouring error     pre-compensation     motion control system     back propagation (BP) neural network    

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Control of the agglomeration of crystals in the reactive crystallization of 5-(difluoromethoxy)-2-mercapto

Yongli WANG, Shuyuan MA, Xiaodong Lü, Chuang XIE

Frontiers of Chemical Science and Engineering 2012, Volume 6, Issue 4,   Pages 423-431 doi: 10.1007/s11705-012-1211-7

Abstract: In addition, the crystallization process of DMB was optimized by a new control strategy of supersaturation

Keywords： 5-(difluoromethoxy)-2-mercapto-1H-benzimidazole (DMB)     reactive crystallization     agglomeration    

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Internal corrosion control and monitoring of Puguang gas gathering system

Ou Li,Li Shijie,Su Guofeng

Strategic Study of CAE 2010, Volume 12, Issue 10,   Pages 70-75

Abstract: The corrosion control plan of"carbon steel + corrosion inhibitor + pigging + corrosion monitoringThe execution effect of corrosion control & monitoring was preliminarily evaluated, and the proposal

Keywords： Puguang sour gas field     H2S     CO2     wet gas transmission     corrosion inhibition     corrosion monitoring    

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Endemicity of H9N2 and H5N1 avian influenza viruses in poultry in China poses a serious threat to poultry

Jiao HU,Xiufan LIU

Frontiers of Agricultural Science and Engineering 2016, Volume 3, Issue 1,   Pages 11-24 doi: 10.15302/J-FASE-2016092

Abstract: The H9N2 and H5N1 avian influenza viruses (AIVs) have been circulating in poultry in China and becomeof influenza viruses, such as the well-known viruses of the highly pathogenic avian influenza (HPAI) H5N2and the 2013 novel H7N7, H7N9 and H10N8 subtypes, thereby threatening both the poultry industry andHere, we will review briefly the prevalence and evolution, pathogenicity, transmission, and disease control

Keywords： avian influenza virus     H9N2     H5N1     novel viruses     public health    

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Development progress of China’s 600 km/h high-speed magnetic levitation train

Frontiers of Engineering Management 2022, Volume 9, Issue 3,   Pages 509-515 doi: 10.1007/s42524-022-0199-z

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Keywords： 600 km/h high-speed magnetic levitation train     development history     technological innovation    

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growth of a-few-layered MoS on CdS nanorod for high efficient photocatalytic H production

Frontiers in Energy 2021, Volume 15, Issue 3,   Pages 752-759 doi: 10.1007/s11708-021-0779-3

Abstract: grown on CdS nanorod by a solid state method using sulfur powder as sulfur source for photocatalytic Hm(MoS2): m(CdS) = 1: 50 (m is mass) reaches 542 μmol/h,which is 6 times of that on pure CdS (92 μmol/h).

Keywords： photocatalytic H2 production     CdS     MoS2 cocatalyst     charge separation    

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Probes and nano-delivery systems targeting NAD(P)H:quinone oxidoreductase 1: a mini-review

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 2,   Pages 123-138 doi: 10.1007/s11705-022-2194-7

Abstract: The two-electron cytoplasmic reductase NAD(P)H:quinone oxidoreductase 1 is expressed in many tissues.NAD(P)H:quinone oxidoreductase 1 is well-known for being highly expressed in most cancers.Because it is a quinone reductase, many bioimaging probes based on quinone structures target NAD(P)H:fluorescent, near-infrared and two-photon fluorescent probes, as well as nanosystems for delivering the NAD(P)H:valuable information for the future development of probes and nano-delivery systems that target NAD(P)H:

Keywords： NAD(P)H:quinone oxidoreductase 1     cancer therapy     target     probe     nanosystem    

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Title Author Date Type Operation

Nonlinear dynamic analysis for elastic robotic arms

H. KORAYEM, H. N. RAHIMI

Journal Article

H∞ control in the frequency domain for a semi-active floor isolation system

Yundong SHI, Tracy C BECKER, Masahiro KURATA, Masayoshi NAKASHIMA

Journal Article

Trajectory planning of mobile robots using indirect solution of optimal control method in generalized

NAZEMIZADEH, H. N. RAHIMI, K. AMINI KHOIY

Journal Article

Full-band error control and crack-free surface fabrication techniques for ultra-precision fly cutting

H. ZHANG, S. F. WANG, C. H. AN, J. WANG, Q. XU

Journal Article

Minimax Q-learning design for H∞ control of linear discrete-time systems

Xinxing LI, Lele XI, Wenzhong ZHA, Zhihong PENG,lixinxing_1006@163.com,xilele.bit@gmail.com,zhawenzhong@126.com,peng@bit.edu.cn

Journal Article

Event-based H∞ control for piecewise-affine systems subject to actuator saturation

Yonghao Jiang, Wei Wu, Xuyang Lou, Zhengxian Jiang, Baotong Cui,y.h.jiang@foxmail.com,weiwu@jiangnan.edu.cn

Journal Article

Impact of wind power generating system integration on frequency stabilization in multi-area power system with fuzzy logic controller in deregulated environment

BHATESHVAR,H. D. MATHUR,H. SIGUERDIDJANE

Journal Article

reference tracking control design for a class of nonlinear systems with time-varying delays

Mei-qin LIU,Hai-yang CHEN,Sen-lin ZHANG

Journal Article

A pre-compensation method of the systematic contouring error for repetitive command paths

H. CHEN,Y. P. CHEN

Journal Article

Control of the agglomeration of crystals in the reactive crystallization of 5-(difluoromethoxy)-2-mercapto

Yongli WANG, Shuyuan MA, Xiaodong Lü, Chuang XIE

Journal Article

Internal corrosion control and monitoring of Puguang gas gathering system

Ou Li,Li Shijie,Su Guofeng

Journal Article

Endemicity of H9N2 and H5N1 avian influenza viruses in poultry in China poses a serious threat to poultry

Jiao HU,Xiufan LIU

Journal Article

Development progress of China’s 600 km/h high-speed magnetic levitation train

Journal Article

growth of a-few-layered MoS on CdS nanorod for high efficient photocatalytic H production

Journal Article

Probes and nano-delivery systems targeting NAD(P)H:quinone oxidoreductase 1: a mini-review

Journal Article