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American Society of Agricultural and Biological Engineers Annual International Meeting 2015

作者： Huang, Zhaoliang Zhu, Qibing Huang, Min Huang, Ge Key Laboratory of Advanced Process Control for Light Industry Jiangnan University Ministry of Education Wuxi214122 China Computer Science Department Colorado State University Fort CollinsCO80523 United States

ISBN: (纸本)9781510810501

Size and color are two important indexes to measure the external quality of apples. The current apple size and color detection methods are mostly designed on PC platform, which are difficult to be popularized to smaller companies and growers for the high expense. This research designed and implemented a novel detection system based on embedded platform that covers full function of apple size and color detection but with much lower cost. The hardware of system was mainly composed of ARM11 processor, CMOS camera and stepping motor. The real-time image of apple was acquired by CMOS camera and diameter value was extracted from image as index of size after image preprocessing. Considering that HSI color model is more close to human visual perception than RGB color model, the RGB image acquired by the CMOS camera was transformed to HSI color model. The H component was calculated to determine the percents of red component, which was used for color grading of apple. Preliminary experiments show that the average detection time is 300ms, color detection accuracy is 90% and size (60∗60 pixel) detection accuracy is 93%, respectively. Compared with the traditional apple detection system, this system has the advantages of higher detection speed, lower cost, and smaller size. It will have a good prospect of application in apple quality detecting areas.

关键词： Stepping motors

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The data filtering based iterative estimation algorithms for a water level system described by a pseudo-linear ARMA model

The data filtering based iterative estimation algorithms for...

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第26届中国过程控制会议（CPCC2015）

作者： Lanjie Guo Yanjiao Wang Feng Ding Key Laboratory of Advanced Process Control for Light Industry(Ministry of Education) Jiangnan University

This paper considers the parameter estimation problem of a water level system described by a pseudo-linear autoregressive moving average(ARMA) model. We derive the state space model of a three-tank water level system by using the fluid dynamics, and obtain the discrete-time model and its input-output representation by using the linearization method and the Euler method. By using the filtering technique, a filtering based gradient iterative(F-GI) algorithm is given and a filtering based least squares iterative(LSI) algorithm is presented for improving the convergence rates and furthermore, a filtering based decomposition LSI algorithm is derived for improving the computational *** key is to use the hierarchical identification principle, to apply the data filtering technique and the decomposition technique to identification, and to replace the unknown terms in the information vectors with their estimates. Compared with the F-GI algorithm, the filtering based LSI algorithm and the filtering based decomposition LSI algorithm have faster convergence rates. The simulation results indicate that the proposed algorithms are effective.

关键词： Parameter estimation Iterative identification Data filtering Pseudo-linear system Water level system

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Electrical Servo Screwdown control System on Cold Rolling Mill for Traveler Substrate

Electrical Servo Screwdown Control System on Cold Rolling Mi...

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第十四届分布式计算及其应用国际学术研讨会

作者： Xueyang Yu Jing Hui Key Laboratory of Advanced Process Control for Light Industry Ministry of Education Jiangnan University

A novel roll position control method, based on electrical screwdown, is proposed to solve the problems such as the complicated operation and poor positioning precision of the manual screwdown on the cold rolling mill for traveler substrate. The new system adopts PLC as the main controller,servo driving system as the actuator, and realizes the flexible adjustment of the roll gap by the proper programming of PLC and the touch *** construction and operation principle of position control system, the hardware realization and the software design are detailedly *** engineering practice proves that the system has 0.001 mm of the high control accuracy, suiting to requirements of the thickness of 0.4 mm-2 mm of the traveler substrate.

关键词： traveler substrate cold rolling mill electrical servo screwdown position control

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Optimal switching policy for performance enhancement of distributed parameter systems based on event-driven control

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Chinese Physics B 2014年第7期23卷 211-217页

作者：穆文英崔宝同楼旭阳李纹 Key Laboratory of Advanced Process Control for Light Industry (Ministry of Education) Jiangnan University

This paper aims to improve the performance of a class of distributed parameter systems for the optimal switching of actuators and controllers based on event-driven control. It is assumed that in the available multiple actuators, only one actuator can receive the control signal and be activated over an unfixed time interval, and the other actuators keep dormant. After incorporating a state observer into the event generator, the event-driven control loop and the minimum inter-event time are ultimately bounded. Based on the event-driven state feedback control, the time intervals of unfixed length can be obtained. The optimal switching policy is based on finite horizon linear quadratic optimal control at the beginning of each time subinterval. A simulation example demonstrate the effectiveness of the proposed policy.

关键词： distributed parameter systems optimal switching policy event-driven

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Model updating strategy for classification of maize seeds using hyperspectral imaging

Model updating strategy for classification of maize seeds us...

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American Society of Agricultural and Biological Engineers Annual International Meeting 2015

作者： Tang, Jinya Huang, Min Zhu, Qibing Huang, Ge Key Laboratory of Advanced Process Control for Light Industry Jiangnan University Ministry of Education Wuxi214122 China Computer Science Department Colorado State University Fort CollinsCO80523 United States

ISBN: (纸本)9781510810501

Hyperspectral imaging is a promising technique for identifying variety of seeds. But the hyperspectral features of seeds are vulnerable to the influence of years. Present modeling methods mostly depend on the training samples in the same year and prediction accuracy of these models will be decreased when these models are used to discriminate the same kind of seeds from the other different years. To improve the stability and robustness of the model, hyperspectral image coupled with model updating strategy based on support vector data description (SVDD) algorithm and Least squares support vector machine (LSSVM) was proposed. SVDD was used to find new samples which were not contained in the original model to update present SVDD model, respectively. Recognition experiments on four kinds of maize seeds under different years showed that the model updating strategy based on SVDD and LSSVM worked well, and the prediction accuracy of model was improved from 84.13% to 93.91% by adding 11.5% to 13.15% of samples under testing from other years to the original training set.

关键词： Hyperspectral imaging

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A Dynamic Clustering Method with Overlaps for Event Detection in WSNs

A Dynamic Clustering Method with Overlaps for Event Detectio...

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第三十四届中国控制会议

作者： Yuan HU Yugang NIU Bei Chen Key Laboratory of Advanced Control and Optimization for Chemical Process of Ministry of Education (East China University of Science and Technology) Central academy Shanghai Electric Group Co. Ltd.

ISBN: (纸本)9781467374439

Clustering is an energy efficient routing protocol for wireless sensor networks. Traditional clustering methods can prolong the network lifetime and achieve scalable performance, but they do not consider the event development. In many applications, the scalability and occurrence region of events often change. A dynamic clustering method with overlaps(DCMO) is proposed in this paper. Due to the 2-logical-coverage overlaps of the proposed clustering method, the clusters can be migrated with the changing tendency of events. As a result, the sensed data can be transmitted at a lower price. Simulations show that the proposed DCMO method has lower energy consumption, compared with LEACH protocol.

关键词： Clustering,event development,2-logical-coverage overlaps,event detection

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Recursive State Estimation for Stochastic Hybrid Systems with Unknown Transition Probabilities

Recursive State Estimation for Stochastic Hybrid Systems wit...

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第26届中国过程控制会议（CPCC2015）

作者： Shunyi Zhao Biao Huang Fei Liu Key Laboratory of Advanced Process Control for Light Industry (Ministry of Education) Jiangnan University Department of Chemical and Materials Engineering University of Alberta

This paper considers the recursive state estimation problem for a class of Markov jump linear systems(JMLSs) with unknown transition probabilities(TPs). Compared with other existing recursive estimators, the underlying real but unknown TPs to be addressed in our method are allowed to be time-variant. The expectation and covariances of residual error calculated in the interacting multiple model(IMM) algorithm are computed to demonstrate that Kalman filter running under true systems can still perform satisfactorily in the presence of wrong TPs and the various mode probabilities reflect the influences of uncertain TPs. A compensation operator which heuristically modifies the posterior probabilities by adjusting a compensation parameter is then developed. A moving target tracking example of the proposed method is presented to demonstrate the effectiveness.

关键词： Recursive state estimation JMLSs unknown TPs time-variant systems IMM

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Predictor-based Synchronization Algorithms for Multiple Harmonic Oscillators with Communication Delay

Predictor-based Synchronization Algorithms for Multiple Harm...

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IEEE International Conference on Information and Automation

作者： Cheng-Lin Liu Key Laboratory of Advanced Process Control for Light Industry (Ministry of Education) Institute of Automation Jiangnan University

ISBN: (纸本)9781467391054

Synchronization problem is investigated for multiple harmonic oscillators with identical communication delay, and two predictor-based distributed algorithms, which include asynchronously-compensated form and synchronously-compensated form, are proposed. To analyze the delay robust-ness intuitively, two predictor-based algorithms accompanied with the normal asynchronously-matched and synchronously-matched distributed algorithms are studied for a simplest interconnection topology that a oscillator follows a leader. Under general directed topology, delay-dependent sufficient conditions are obtained respectively for the synchronization algorithm in asynchronously-compensated and synchronously-compensated algorithms by using frequency-domain analysis. Numerical simulations illustrate the correctness of the theoretical analysis.

关键词： Harmonic oscillators Synchronization Communication delay Predictor-based synchronization algorithm

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Non-destructive Measurement for Monascus Solid-State Fermentation via NIR Spectroscopy Calibration

Non-destructive Measurement for Monascus Solid-State Ferment...

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第26届中国过程控制会议（CPCC2015）

作者： Xin Chen Yanyan Yin Fei Liu Key Laboratory of Advanced Process Control for Light Industry(Ministry of Education) Institution of Automation Jiangnan University

This paper considers nondestructive measurement of the Monascus solid-state fermentation taking usage of near infrared spectroscopy analysis *** content and p H value are important chemical indicators of the solid-state fermentation process and reflect biochemical activities of the *** this paper,NIR spectra of the fermentation process are selected and chemo-metrics model is established taking usage of least square random variable ensemble *** correlation coefficient of the moisture content of prediction set is *** correlation coefficient of the p H value of prediction set is *** model performance is accessible and the effectiveness of the strategy is proven.

关键词： Near-infrared spectroscopy Monascus solid-state fermentation process Random variable subspace ensemble strategy

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Electrical Servo Screwdown control System on Cold Rolling Mill for Traveler Substrate

Electrical Servo Screwdown Control System on Cold Rolling Mi...

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The 14th International Symposium on Distributed Computing and Applications to Business,Engineering and Science(DCABES 2015)(第十四届分布式计算及其应用国际学术研讨会)

作者： Xueyang Yu Jing Hui Key Laboratory of Advanced Process Control for Light Industry Ministry of Education Jiangnan UniversityWuxiChina

A novel roll position control method,based on electrical screwdown,is proposed to solve the problems such as the complicated operation and poor positioning precision of the manual screwdown on the cold rolling mill for traveler *** new system adopts PLC as the main controller,servo driving system as the actuator,and realizes the flexible adjustment of the roll gap by the proper programming of PLC and the touch *** construction and operation principle of position control system,the hardware realization and the software design are detailedly *** engineering practice proves that the system has 0.001mm of the high control accuracy,suiting to requirements of the thickness of 0.4mm-2mm of the traveler substrate.

关键词： traveler substrate cold rolling mill electrical servo screwdown position control

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