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A model reference adaptive control based method for actuator delay estimation in real-time testing

Cheng CHEN, James M. RICLES

Frontiers of Structural and Civil Engineering 2010, Volume 4, Issue 3,   Pages 277-286 doi: 10.1007/s11709-010-0072-8

Abstract: The compensation of actuator delay is therefore critical to achieve stable and reliable experimentaldelay and achieve good actuator control for real-time tests.However, these adaptive methods all require time duration for actuator delay adaptation.Experiments show that a good actuator delay estimate can help optimize the performance of the adaptiveThe rate of adaptation also requires that a good actuator delay estimate be acquired especially for the

Keywords： real-time testing     actuator delay     compensation     adaptive control     MIT rule     discrete transfer function    

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New nonlinear stiffness actuator with predefined torque‒deflection profile

Frontiers of Mechanical Engineering 2023, Volume 18, Issue 1, doi: 10.1007/s11465-022-0721-3

Abstract: A nonlinear stiffness actuator (NSA) could achieve high torque/force resolution in low stiffness range

Keywords： compliant actuator     nonlinear stiffness actuator     nonlinear spring     predefined torque−deflection profile    

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Applicability of high dimensional model representation correlations for ignition delay times of n-heptane

Wang LIU, Jiabo ZHANG, Zhen HUANG, Dong HAN

Frontiers in Energy 2019, Volume 13, Issue 2,   Pages 367-376 doi: 10.1007/s11708-018-0584-9

Abstract: It is difficult to predict the ignition delay times for fuels with the two-stage ignition tendency becausesampling-high dimensional model representation (RS-HDMR) methods were employed to predict the ignition delayA detailed n-heptane chemical mechanism was used to calculate the fuel ignition delay times in the adiabaticBesides, the ignition delay times predicted by both types of correlations were validated against thoseTherefore, it is concluded that HDMR correlations are capable of predicting the ignition delay times

Keywords： ignition delay     random sampling     high dimensional model representation     n-heptane     fuel kinetics    

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Development of a masticatory robot using a novel cable-driven linear actuator with bidirectional motion

Frontiers of Mechanical Engineering 2022, Volume 17, Issue 4, doi: 10.1007/s11465-022-0687-1

Abstract: A cable-driven linear actuator (CDLA) capable of bidirectional motion is proposed in this study to design

Keywords： masticatory robot     cable-driven     linear actuator     parallel robot     stiffness analysis    

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Mechanical design and analysis of a novel variable stiffness actuator with symmetrical pivot adjustment

Frontiers of Mechanical Engineering 2021, Volume 16, Issue 4,   Pages 711-725 doi: 10.1007/s11465-021-0647-1

Abstract: Thus, this paper aims to design a novel variable stiffness actuator (VSA) that can provide safer physical

Keywords： variable stiffness actuator     variable stiffness module     drive module     symmetrical structure     double-deck    

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Design and characteristic research of a novel electromechanical-hydraulic hybrid actuator with two transmission

Frontiers of Mechanical Engineering 2023, Volume 18, Issue 2, doi: 10.1007/s11465-022-0735-x

Abstract: This study proposes and designs a novel electromechanical-hydraulic hybrid actuator (EMHA) that integrates

Keywords： electromechanical-hydraulic hybrid actuator (EMHA)     integration     transmission mechanisms     power assistance    

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Detection of schedule delay risk of empirical construction projects

Tsegay GEBREHIWET, Hanbin LUO

Frontiers of Engineering Management 2018, Volume 5, Issue 2,   Pages 251-267 doi: 10.15302/J-FEM-2018086

Abstract: In Ethiopian construction projects, schedule delay risk is a predominant issue because it is not properlyconstruction projects, limited efforts have been made to investigate the typical and the overall schedule delayIn this study, our aim is to detect the typical and overall schedule delay risk throughout the constructionThe findings showed that there is a typical delay risk either in the type or in the level of the different

Keywords： fuzzy analytic hierarchy process comprehensive evaluation     construction project     detection of delay risk    

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Stability analysis of uncertain fractional-order neutral-type delay systems with actuator saturation Research Articles

Zahra Sadat Aghayan, Alireza Alfi, J. A. Tenreiro Machado,a_alfi@shahroodut.ac.ir

Frontiers of Information Technology & Electronic Engineering 2021, Volume 22, Issue 10,   Pages 1402-1412 doi: 10.1631/FITEE.2000438

Abstract: This study analyzes the problem of of fractional-order delay systems of neutral type under actuator

Keywords： 分数阶系统；稳定性；中立时滞；鲁棒性；饱和性    

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Dynamical research on spherical micro actuator with piezoelectric ceramic stacks drivers

ZHANG Ruihua, CHEN Haichu

Frontiers of Mechanical Engineering 2007, Volume 2, Issue 4,   Pages 433-438 doi: 10.1007/s11465-007-0074-y

Abstract: This paper develops a 30 mm × 30 mm × 50 mm spherical micro actuator driven by piezoelectric ceramicFirst, the space coordinate relationship of the spherical micro actuator and a dynamic model are setSecond, The Runge-Kutta arithmetic is used to calculate the dynamical parameters of the micro actuatorwith a micro-gripper based on the sample spherical micro actuator, and the experimental research onof the micro actuator, driving signal frequency, friction coefficient of the contact surface between

Keywords： spherical     micro-gripper     friction coefficient     dynamic     frequency    

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End-to-end delay analysis for networked systems

Jie SHEN,Wen-bo HE,Xue LIU,Zhi-bo WANG,Zhi WANG,Jian-guo YAO

Frontiers of Information Technology & Electronic Engineering 2015, Volume 16, Issue 9,   Pages 732-743 doi: 10.1631/FITEE.1400414

Abstract: End-to-end delay measurement has been an essential element in the deployment of real-time services inTraditional methods of delay measurement based on time domain analysis, however, are not efficient asWe propose a novel theoretical framework to analyze the end-to-end delay distributions of networked systemsdelay distribution is indeed the inverse Laplace transform of the transfer function of the signal flowBy analyzing the time responses of the transfer function, we obtain the end-to-end delay distribution

Keywords： Networked system     End-to-end     Delay distribution    

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Impact drive rotary precision actuator with piezoelectric bimorphs

ZHANG Hongzhuang, ZENG Ping, HUA Shunming, CHENG Guangming, YANG Zhigang

Frontiers of Mechanical Engineering 2008, Volume 3, Issue 1,   Pages 71-75 doi: 10.1007/s11465-008-0008-3

Abstract: An impact drive rotary precision actuator with end-loaded piezoelectric cantilever bimorphs is proposedcantilever bimorphs, a specific fixed-frequency and adjustable-amplitude is confirmed to control the actuatorThe results show that an actuator excited by fixed-frequency and the adjustable-amplitude ramp voltageability, simple structure and only one percent the cost of traditional impact drive mechanisms, the actuator

Keywords： specific fixed-frequency     waveform     piezoelectric cantilever     mechanisms     adjustable-amplitude    

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Motion control of multi-actuator hydraulic systems for mobile machineries: Recent advancements and future

Bing XU, Min CHENG

Frontiers of Mechanical Engineering 2018, Volume 13, Issue 2,   Pages 151-166 doi: 10.1007/s11465-018-0470-5

Abstract: recent advancements and upcoming trends in motion control technologies employed in designing multi-actuatorHowever, motion control technologies of multi-actuator hydraulic systems have faced increasing challengesThen, the advanced operation methods of multi-actuator mobile machineries are reviewed, including coordinated

Keywords： motion control     electrohydraulic control     energy efficiency     mobile machineries    

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Effect of 2,5-dimethylfuran addition on ignition delay times of n-heptane at high temperatures

Zhenhua GAO, Erjiang HU, Zhaohua XU, Geyuan YIN, Zuohua HUANG

Frontiers in Energy 2019, Volume 13, Issue 3,   Pages 464-473 doi: 10.1007/s11708-019-0609-z

Abstract: The experimental observations indicate that the ignition delay times nonlinearly increase with an increasethe competition of small radicals, which primarily leads to the nonlinear increase in the ignition delay

Keywords： ignition delay time     shock tube     kinetic model     2     5-dimethylfuran (DMF)     n-heptane    

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Preparation and performance of soft actuator based on IPMC with silver electrodes

Qi CHEN, Ke XIONG, Kan BIAN, Ning JIN, Bangfeng WANG,

Frontiers of Mechanical Engineering 2009, Volume 4, Issue 4,   Pages 436-440 doi: 10.1007/s11465-009-0054-5

Abstract: The surface electrodes of traditional ionic polymer-metal composites (IPMC) are made of platinum. To reduce the production cost, nonprecious metals such as silver is proposed. A new approach of electroless silver plating based on chemical deposition method is adopted, getting two types of IPMCs, Pt-Ag IPMC, and Ag-Ag IPMC. The microscopic analysis, driving abilities tests, and their surface-electrode resistance analysis show that Ag and Pt particles penetrate inside Nafion membrane with gradient distribution throughout the membrane. The maximum electro-active bending deformation angles of the specimens, which are obtained under the same specimen dimension and constrains, are about 60° for Pt-Pt IPMC and Pt-Ag IPMC and 90° for the Ag-Ag IPMC, respectively, corresponding to the driving voltage of 3 V, 4 V, and 1.5 V. The surface-electrode resistance of Ag-Ag IPMC is the lowest and the most stable, which shows that the proposed approach is valid. The experiments show that the IPMC technology based on the silver electrode is feasible.

Keywords： ionic polymer-metal composites (IPMC)     Nafion     intelligent material     soft actuators     electroless silver plating    

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Ignition delay of dual fuel engine operating with methanol ignited by pilot diesel

ZOU Hongbo, WANG Lijun, LIU Shenghua, LI Yu

Frontiers in Energy 2008, Volume 2, Issue 3,   Pages 285-290 doi: 10.1007/s11708-008-0060-z

Abstract: An investigation on the ignition delay of a dual fuel engine operating with methanol ignited by pilotpolytropic index of compression process of the dual fuel engine decreases linearly while the ignition delayCompared with the conventional diesel engine, the ignition delay increment of the dual fuel engine isWith the elevation of the intake charge temperature from 20°C to 40°C and then to 60°C, the ignition delayMoreover, with the increase in engine speed, the ignition delay of the dual fuel engine by time scale
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Title Author Date Type Operation

A model reference adaptive control based method for actuator delay estimation in real-time testing

Cheng CHEN, James M. RICLES

Journal Article

New nonlinear stiffness actuator with predefined torque‒deflection profile

Journal Article

Applicability of high dimensional model representation correlations for ignition delay times of n-heptane

Wang LIU, Jiabo ZHANG, Zhen HUANG, Dong HAN

Journal Article

Development of a masticatory robot using a novel cable-driven linear actuator with bidirectional motion

Journal Article

Mechanical design and analysis of a novel variable stiffness actuator with symmetrical pivot adjustment

Journal Article

Design and characteristic research of a novel electromechanical-hydraulic hybrid actuator with two transmission

Journal Article

Detection of schedule delay risk of empirical construction projects

Tsegay GEBREHIWET, Hanbin LUO

Journal Article

Stability analysis of uncertain fractional-order neutral-type delay systems with actuator saturation

Zahra Sadat Aghayan, Alireza Alfi, J. A. Tenreiro Machado,a_alfi@shahroodut.ac.ir

Journal Article

Dynamical research on spherical micro actuator with piezoelectric ceramic stacks drivers

ZHANG Ruihua, CHEN Haichu

Journal Article

End-to-end delay analysis for networked systems

Jie SHEN,Wen-bo HE,Xue LIU,Zhi-bo WANG,Zhi WANG,Jian-guo YAO

Journal Article

Impact drive rotary precision actuator with piezoelectric bimorphs

ZHANG Hongzhuang, ZENG Ping, HUA Shunming, CHENG Guangming, YANG Zhigang

Journal Article

Motion control of multi-actuator hydraulic systems for mobile machineries: Recent advancements and future

Bing XU, Min CHENG

Journal Article

Effect of 2,5-dimethylfuran addition on ignition delay times of n-heptane at high temperatures

Zhenhua GAO, Erjiang HU, Zhaohua XU, Geyuan YIN, Zuohua HUANG

Journal Article

Preparation and performance of soft actuator based on IPMC with silver electrodes

Qi CHEN, Ke XIONG, Kan BIAN, Ning JIN, Bangfeng WANG,

Journal Article

Ignition delay of dual fuel engine operating with methanol ignited by pilot diesel

ZOU Hongbo, WANG Lijun, LIU Shenghua, LI Yu

Journal Article