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Nonsmooth identification of mechanical systems with backlash-like hysteresis

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控制理论与应用（英文版） 2013年第3期11卷 477-482页

作者： ruili dong Yonghong TAN David HE College of Mechanical and Electronic Technology Shanghai Normal University Department of Mechanical and Industrial Engineering University of Illinois

Backlash-like hysteresis is one of the nonsmooth and multi-valued nonlinearities usually existing in mechanical systems. The traditional identification method is quite difficult to be used to model the systems involved with such complex nonlinearities. In this paper, a nonsmooth recursive identification algorithm for the systems with backlash-like hysteresis is proposed. In this method, the concept of Clarke subgradient is introduced to approximate the gradients at nonsmooth points and the so-called bundle method is used to obtain the optimization search direction in nonsmooth cases. Then, a recursive algorithm based on the idea of bundle method is developed for parameter estimation. After that, the convergence analysis of the algorithm is investigated. Finally, simulation results to validate the proposed method on a simulated mechanical transmission system are presented.

关键词： Identification Mechanical system Pseudo-Hammerstein model Backlash Bundle method Subgradient

A Dynamic Hysteresis Model of Piezoelectric Ceramic Actuators

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Chinese Journal of Electronics 2023年第6期32卷 1278-1285页

作者： dong ruili TAN Yonghong XIE Yingjie LI Xiaoli College of Information Science and Technology Donghua University College of Information Mechanicaland Electrical Engineering Shanghai Normal University Shanghai Pudong Development Bank

A modified Prandtl-Ishlinskii(PI) model with rate-dependent thresholds for describing the hysteresis characteristics of piezoelectric actuators is *** on the classical PI model, a novel threshold depending on the input rate is constructed. With the novel rate-dependent threshold, the play operator has the capability to track the frequency variation of the input signal. Hence, the proposed modified PI model can be used to depict the rate-dependent hysteresis of piezoelectric actuators. Experimental results are presented to illustrate the model validation results of the proposed modeling.

关键词： Piezoelectric actuators Ceramics Hysteresis

Identification of Electrostatically Driven Scanning Micro-Mirror 36

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Identification of Electrostatically Driven Scanning Micro-Mi...

第36届中国控制会议

作者： ruili dong Yonghong Tan Hui Chen Department of Electrical and Computer Engineering University of Windsor College of Information Mechanical and Electrical EngineeringShanghai Normal University School of Computer Science Guilin University of Electronic Technology

ISBN: (纸本)9781538629185

In this paper,an identification scheme is proposed for electrostatically driven scanning *** this scheme,the first principle model of the micro-scanner is investigated *** on the analysis of the first principle model,a model structure which is more convenient for controller design is *** model structure consists of linear dynamic part and backlash-like *** linear dynamic submodel is applied to the modeling of the underdamping feature of the deflection mechanism of the micro-mirror while backlash-like hysteresis can approximate the electrostatic comb characteristic of the *** identification algorithm to handle the non-smooth backlash-like hysteresis is ***,the corresponding model validation results are presented.

关键词： Identification micro-mirror modeling backlash-like hysteresis

A new improved Bouc-Wen Model of Piezoelectric Ceramics Actuators

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A new improved Bouc-Wen Model of Piezoelectric Ceramics Actu...

第40届中国控制会议

作者： Jinyu Hu ruili dong Yonghong Tan Department of Automation Donghua University the College of Mechanical and Electronic Engineering Shanghai Normal University

In this paper,in order to describe the asymmetric and input rate-dependent hysteresis behavior of piezoelectric ceramics actuators（PEAs）,a new improved Bouc-Wen model（BWM） is ***,a new input function is introduced to characterize the asymmetric hysteresis of the PEAs,and the frequency of input voltage is introduced into the hysteresis model to characterize the dynamic hysteresis of the *** that,the parameters of the improved BWM are identified through the differential evolution ***,the experimental results show that the output of the improved BWM can well describe the hysteresis properties of PEAs.

关键词： Piezoelectric ceramics actuator Rate-dependent hysteresis asymmetric Bouc-Wen model

An Angle Tuning Method of MEMS Micro-mirror

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An Angle Tuning Method of MEMS Micro-mirror

第37届中国控制会议

作者： ruili dong Yonghong Tan Xiang Chen Engineering Research Center of Digital Textile & Apparel Technology College of Information Science and TechnologyDonghua University College of Information Electro-Mechanical EngineeringShanghai Normal University Department of Elctrical and Computer Engineering University of Windsor

In this paper,an internal model-based tuning scheme of oscillation caused by underdamping characteristic of deflection mechanism in electromagnetic MEMS *** this scheme,an approximated resonant compensator for suppressing the oscillation of micro-mirror is ***,an internal model-based tuning scheme with robust design is implemented to the angular tuning of electromagnetic *** experiments on an electromagnetically actuated micro-mirror are implemented for evaluation of the proposed tuning approach.

关键词： MEMS micro-mirror model-based tuning oscillation

A Hybrid Compensation Scheme for the Input Rate-Dependent Hysteresis of the Piezoelectric Ceramic Actuators

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Journal of donghua University(English Edition) 2024年第4期41卷 436-446页

作者： dong ruili TAN Yonghong HOU Jiajia ZHENG Bangsheng College of Information Science and Technology Donghua UniversityShanghai 201620China College of Mechanical and Electronic Engineering Shanghai Normal UniversityShanghai 200234China

A hybrid compensation scheme for piezoelectric ceramic actuators(PEAs)is *** the hybrid compensation scheme,the input rate-dependent hysteresis characteristics of the PEAs are *** feedforward controller is a novel input rate-dependent neural network hysteresis inverse model,while the feedback controller is a proportion integration differentiation(PID)*** the proposed inverse model,an input ratedependent auxiliary inverse operator(RAIO)and output of the hysteresis construct the expanded input space(EIS)of the inverse model which transforms the hysteresis inverse with multi-valued mapping into single-valued mapping,and the wiping-out,rate-dependent and continuous properties of the RAIO are analyzed in *** on the EIS method,a hysteresis neural network inverse model,namely the dynamic back propagation neural network(DBPNN)model,is ***,a hybrid compensation scheme for the PEAs is designed to compensate for the ***,the proposed method,the conventional PID controller and the hybrid controller with the modified input rate-dependent Prandtl-Ishlinskii(MRPI)model are all applied in the experimental *** results show that the proposed method has obvious superiorities in the performance of the system.

关键词： hybrid control input rate-dependent hysteresis inverse model neural network piezoelectric ceramic actuator

An Online Fault Diagnosis Method for MEMS Micromirrors

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An Online Fault Diagnosis Method for MEMS Micromirrors

第43届中国控制会议

作者： Yonghong Tan Jiawei Mu Fumin Wang ruili dong Qingyuan Tan Qingmei Cao Shanghai Normal University donghua University University of Windsor University of Shanghai for Science and Technology

A method for online fault detection and diagnosis of electromagnetic scanning micromirrors used in laser scanners has been proposed. In this method, a state space model with hysteresis is developed to describe the characteristics of electromagnetic scanning micromirrors(ESM). Based on this model, a non-smooth extended state observer is designed to detect the failure of ESM. Then, an online fault diagnosis mechanism is built for the isolation of failures of ESM based on the residual data in both time and frequency-domains. Finally, the proposed diagnostic method was validated through experiments, and the results showed that the proposed method can accurately isolate the faults occur in the micromirrors.

关键词： Micromirror hysteresis fault detection diagnosis

艾灸联合早期康复训练对出血性脑卒中患者上肢功能障碍的影响

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中国民间疗法 2021年第4期29卷 53-55页

作者：董瑞丽山西省中西医结合医院山西太原030013

目的:探讨艾灸联合早期康复训练对出血性脑卒中患者上肢功能障碍的改善效果。方法:选取90例出血性脑卒中患者,根据干预方法的不同分为对照组和观察组,每组45例。对照组给予早期康复训练,观察组给予早期康复训练联合艾灸治疗。比较两组... 详细信息

目的:探讨艾灸联合早期康复训练对出血性脑卒中患者上肢功能障碍的改善效果。方法:选取90例出血性脑卒中患者,根据干预方法的不同分为对照组和观察组,每组45例。对照组给予早期康复训练,观察组给予早期康复训练联合艾灸治疗。比较两组患者干预前、干预3个月后上肢功能、神经功能及日常生活能力。结果:干预3个月后,两组患者肢体运动功能FMA量表上肢部分(FMA-UE)评分、改良日常生活活动能力量表(MBI)评分均高于干预前,且观察组高于对照组,差异均有统计学意义(P<0.05);两组患者美国国立卫生研究院卒中量表(NIHSS)评分均低于干预前,且观察组低于对照组,差异均有统计学意义(P<0.05)。结论:艾灸联合早期康复训练可改善出血性脑卒中患者的上肢功能,缓解其神经功能损伤,提升日常生活能力。

关键词：出血性脑卒中艾灸早期康复训练上肢功能神经功能日常生活能力

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浓香型大曲中的嗜热真菌

中国酿造 2011年第4期30卷 75-77页

作者：董瑞丽罗惠波叶光斌四川理工学院生物工程学院四川自贡643000 酿酒生物技术及应用四川省重点实验室四川自贡643000

试验通过分子生物学方法对浓香型大曲中真菌区系进行了研究。构建了真菌18S rRNA基因文库,并从文库中随机挑选85个阳性克隆子进行限制性片段长度多态性(RFLP)和测序比对分析,结果发现,克隆子编号D71、D46、D47的序列结果分别与Thermoasc... 详细信息

试验通过分子生物学方法对浓香型大曲中真菌区系进行了研究。构建了真菌18S rRNA基因文库,并从文库中随机挑选85个阳性克隆子进行限制性片段长度多态性(RFLP)和测序比对分析,结果发现,克隆子编号D71、D46、D47的序列结果分别与Thermoascus crustaceus、Thermomyces lanuginosus和Talaromyces byssochlamydoides的相似度达到99%,该结果表明浓香型大曲中存在很多以前未报道的嗜热真菌。

关键词：浓香型大曲分子生物学嗜热真菌