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Remote control of smart sprinkler system based on CAN-BUS

Zhongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Central South University (Science and Technology) 2013年第SUPPL.1期44卷 292-296页

作者： Zhang, Shuzhe Ye, Hua Mao, Jianliang Shi, Yiwen School of Automation Southeast University Nanjing 210096 China Key Laboratory of Measurement and Control of Complex Systems of Engineering of Ministry of Education Southeast University Nanjing 210096 China School of Marketing and Logistics Management Nanjing University of Finance and Economics Nanjing 210046 China

Till now, most lawn is still irrigated manually or timely. That means lack of proper irrigation strategy and information management ability. However, irrational irrigation method will not only lead to unhealthy growth of lawn, but also waste of water. A new idea for lawn intelligent remote irrigation was put forward. The smart sprinkler strategy was created by researching the characters of lawn, such as water demand, heat resistance and diseases law. And the embeded control system can apply the strategy to irrigate intelligently. Tying the urban lawn features, the system was designed to be driven by solar, which makes it an energy self-sufficiency system. What's more, the sprinkler system gains the CAN bus-based network management function, which simplify the user's contol and management. Finally, the experimental results show that the system has the advantages of good effect, low cost, high reliability, easy maintenance, etc. And it will meet the demand of energy saving and environmental protection.

关键词： Remote control

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Multi-model switching control for SISO discrete systems

Multi-model switching control for SISO discrete systems

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Chinese control Conference (CCC)

作者： Zhengtao Zhan Lei Yu Jun Huang Shumin Fei Gang Yang School of Mechanical and Electric Engineering Soochow University Suzhou 215021 China Key Laboratory of Measurement and Control of Complex Systems of Engineering Ministry of Education Southeast University Nanjing China 210096 Digital Manufacture Technology Key Laboratory of JiangSu Province Huaian China 223003

For the existing problem of conventional adaptive control and multi-model adaptive switching control theory and method, a robust adaptive control via multi-model switching method for the SISO(Single Input Single Output) discrete systems. Many multi-model subsets have override the model set of the system parameters, which consist of the fixed models and adaptive models together. The best matching controller has been selected as the system controller from the design of the switching index function, which can greatly improve the system transient performance. Simulation results show that the proposed algorithm has greatly enhanced the robustness of the system and improved the transient characteristics of dynamic systems.

关键词： Switches Adaptation models Adaptive control Robustness Educational institutions

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NNDOB-based composite control for binary distillation column under disturbances

NNDOB-based composite control for binary distillation column...

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Chinese control Conference (CCC)

作者： Juan Li Xisong Chen Shihua Li Jun Yang Jiancheng Zhou School of Automation Southeast University Nanjing 210096 Key Laboratory of Measurement and Control of Complex Systems of Engineering Ministry of Education China School of Chemistry and Chemical Engineering Southeast University Jiangning District Nanjing 211189 China

This paper presents a composite disturbance rejection control strategy for high purity binary distillation column with complex characteristics, such as couplings, non-minimum phase, model mismatches and external disturbances. Main goal of the controller is to get the desired top and bottom compositions in presence of both model mismatches and external disturbances. The composite controller includes neural network inverse controller (NNIC) and neural network disturbance observer (NNDOB) both using radial basis function network (RBFN). The inverse model of the system is identified by RBFN, whose stability is proved via the Lyapunov function analysis. And a rigorous analysis is also given to show why the NNDOB can effectively suppress the disturbances. Performance of the proposed scheme is compared with PID and NNIC schemes in two cases. The feasibility, effectiveness and disturbance rejection property of the proposed method are demonstrated by the simulation studies.

关键词： Artificial neural networks Distillation equipment Observers MIMO Feeds Educational institutions

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The inversion control of nonlinear differential-algebraic-equation subsystems: Extended Interactor algorithm

The inversion control of nonlinear differential-algebraic-eq...

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Chinese control Conference (CCC)

作者： Qiang Zang Kaifeng Zhang Xianzhong Dai Ying Zhou Tao Li School of Information and Control Engineering Nanjing University of Information Science & Technology 210044 China Key Laboratory of Measurement and Control of Complex Systems of Engineering Ministry of Education Southeast University Nanjing 210096 China College of Automation Nanjing University of Posts and Telecommunications 210003 China

For a class of nonlinear differential-algebraic equations subsystems, whose index is one and interconnection is local measurable, the inversion control problem is studied by extending Interactor algorithm of nonlinear ordinary differential equations systems. Compared with existing results, the proposed method in this paper bears better realization because of no complex matrix transformation being needed. Firstly, the definition of right inverse systems is presented. Secondly, an extended Interactor algorithm is proposed to judge whether the controlled systems are invertable. Once the controlled systems are invertable, a physical realizable right inverse system is constructed, with which the controlled systems are made linearization and decoupled so that linear control methods can be applied. Finally, an excitation controller is designed for one synchronous generator of multi-machine power systems based on the proposed method in this paper. The simulation results illustrate the validity of the proposed control method in this paper.

关键词： Electronic mail Educational institutions Differential equations Algorithm design and analysis Power systems control engineering

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A fast convergence deadlock control strategy of Petri nets based on MIP algorithm

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International Journal of Advancements in Computing Technology 2012年第17期4卷 589-598页

作者： Wang, Shouguang Wang, Dong Tan, Zhonghong Guan, Xuanxuan Wang, Chengying School of Information and Electronic Engineering Zhejiang Gongshang University Hangzhou 310018 China Key Laboratory of Measurement and Control of Complex Systems of Engineering Ministry of Education Southeast University Nanjing China

This paper presents a deadlock prevention method for a class of flexible manufacturing systems (FMS) where deadlocks are caused by unmarked siphons in the Petri net. In order to prevent deadlock, we propose a new algorithm to forbid the bad states maximally at each iteration so that the number of reachable states comes nearest to the optimal one. First, compute a maximal unmarked siphon by using an MIP algorithm. Then, obtain a subnet based on the unmarked siphon. Next, compute all minimal siphons of the subnet and add monitors to control them. We choose the right minimal siphon to control at last by comparison of their state number. This strategy is an iterative method. With the development of this algorithm, we avoid the redundant monitors, and hence significantly improve the computational efficiency. Finally, the proposed method is illustrated by using an example.

关键词： Petri nets

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A coordination and optimization method for multi-bridge waterjet cutting processes

A coordination and optimization method for multi-bridge wate...

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42nd International Conference on Computers and Industrial engineering 2012, CIE 2012

作者： Li, Jun Sun, Qirui Dai, Xianzhong Key Laboratory of Measurement and Control of Complex Systems of Engineering Southeast University Ministry of Education Nanjing 210096 China

ISBN: (纸本)9781627486842

Recently, the rapidly increasing demand for cutting of large-sized flat work pieces calls for the emergence of large waterjet cutting machine tools. Multi-bridge waterjet cutting machines are one of the preferred solutions. However, there must be an overlap between the work areas of any pair of adjacent bridges on each of which a workhead with a nozzle is installed in a multi-bridge machine to ensure that no dead zones exist for cutting. It means that a pair of adjacent bridges may crash with each other over their superposed processing area and result in damages or a breakdown of the machine. It is an interference problem that a multi-bridge machine suffers from. This paper proposes a coordination policy to avoid interference, where the dimensional overlap of any pair of adjacent bridges is transformed into those of their processing time sequences. Thus, by shifting the processing time sequences to eliminate the time overlaps, the collision between the corresponding two bridges can be avoided. Subsequently, to enhance reliability of the system, a GA-based optimization algorithm incorporated with the coordination policy is designed for scheduling the multiple cutting paths of a machine to minimize the totally potential need of coordination. The validity of the presented method is confirmed by applying it into a case study. © 2012 CIE & SAIIE.

关键词： Machine tools

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Realizability of n-port resistive networks with 2n terminals

Realizability of n-port resistive networks with 2n terminals

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Asian control Conference

作者： Michael Z. Q. Chen Chanying Li Kai Wang Zhiqiang Zuo Minghui Yin Guanrong Chen Department of Mechanical Engineering University of Hong Kong Hong Kong China School of Automation Nanjing University of Science and Technology Nanjing China Academy of Mathematics and Systems Science Chinese Academy of Sciences Beijing China Tianjin Key Laboratory of Process Measurement and Control School of Electrical Engineering and Automation Tianjin University Tianjin China Department of Electronic Engineering City University of Hong Kong Hong Kong China

In this paper, we consider the realizability problem of n-port resistive networks containing 2n terminals. A necessary and sufficient condition for any real symmetric matrix to be realizable as the admittance of an n-port resistive network containing 2n terminals is obtained. The condition is based on the existence of a parameter matrix. We then focus on a three-port resistive network containing six terminals. A necessary and sufficient condition is derived for any real symmetric matrix to be realizable as the admittance of a three-port resistive network containing six terminals and at most five positive elements, whose topological structure is properly restricted.

关键词： Symmetric matrices Ports (Computers) Admittance Educational institutions Resistors Joining processes Passive networks

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Energy efficient target tracking algorithm using cooperative sensors

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Journal of systems engineering and Electronics 2012年第5期23卷 640-648页

作者： Chun Zhang Shumin Fei School of Automation Southeast UniversityNanjing 210096P.R.China Key Laboratory of Measurement and Control of Complex Systems of Engineering Ministry of EducationSoutheast UniversityNanjing 210096P.R.China

Target tracking is one of the applications of wireless sensor networks（WSNs）.It is assumed that each sensor has a limited range for detecting the presence of the object,and the network is sufficiently dense so that the sensors can cover the area of *** to the limited battery resources of sensors,there is a tradeoff between the energy consumption and tracking *** solve this problem,this paper proposes an energy efficient tracking *** on the cooperation of dispatchers,sensors in the area are scheduled to switch their working mode to track the *** energy consumed in active mode is higher than that in monitoring or sleeping mode,for each sampling interval,a minimum set of sensors is woken up based on the select ***,other sensors keep in sleeping *** analysis and simulation results show that the proposed algorithm provides a better performance than other existing approaches.

关键词： target tracking wireless sensor network energy consumption tracking accuracy

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A self-learning algorithm based on support vector machine for scheduling a job-shop-like knowledgeable manufacturing cell

A self-learning algorithm based on support vector machine fo...

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2011 International Conference on Mechanical engineering, Materials and Energy, ICMEME 2011

作者： Li, Wen-Chao Yan, Hong-Sen Key Laboratory of Measurement and Control of Complex Systems Engineering Southeast University Ministry of Education Nanjing 210096 China Department of Transportation Jiangsu University Zhenjiang 212013 China

ISBN: (纸本)9783037853405

The job-shop-like knowledgeable manufacturing cell scheduling is a NP-complete problem and there has not been a completely valid algorithm for it until now. An algorithm with self -learning ability is proposed through the addition of precedence constraint of operations on the basis of directed graph. A method based on support vector machine is constructed to choose accurately interchangeable operations by small samples earning to obtain the better scheduling. The classification accuracy can be improved by the continuous addition of new instances to the sample library. The results of simulation show that the algorithm performs well for the job-shop-like knowledgeable manufacturing cell. © (2012) Trans Tech Publications, Switzerland.

关键词： Computational complexity

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Absorbance experiments on different pesticide formulations and mixed concentration sensor design

Absorbance experiments on different pesticide formulations a...

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American Society of Agricultural and Biological Engineers Annual International Meeting 2012

作者： Guan, Xianping Qiu, Baijing Zhang, Xiaodong Zuo, Zhiyu Dong, Xiaoya Key Laboratory of Modern Agricultural Equipment and Technology Ministry of Education Jiangsu University Zhenjiang 212013 China Key Laboratory of Measurement and Control of Complex Systems of Engineering Ministry of Education Southeast University Nanjing 210096 China

ISBN: (纸本)9781622762088

This paper carried out the absorbance experiments on different pesticide formulations and mixed pesticide concentration sensor design for online mixing system based on the precision spray requirements. There are many different pesticide formorlations, among which wettable powder (WP) and emulsifiable concentrates (EC) are most widely used ones in China. The optical methods were chosen for quick and precise measurement based on the physical characteristics of commonly used pesticide formulations and generally low spraying concentrations. Firstly we carried out monochromatic light absorbance experiments to study the optical properties of different pesticide formulations. We prepared the solutions with different possible spraying concentrations of WP and EC of several commonly used pesticdes and used UV-Vis spectrophotometer to measur the absorbance of the prepared solutions. The experiment results show that: in the UV-visible wavelength range, the absorbances of the suspension or emulsion of WP or EC generally decrease with increasing optical wavelength, but the solution concentration and the absorbance value is not proportional. In the 600-800nm range the absorbances have good differentiation. In order to select the appropriate absorbance range of wavelengths and considering the available of laser diode, the monochromatic light with wavelength of 650nm was chosen as the source light. Then we carried out the preliminary design of mixed pesticide concentration sensor. The sensor is composed of monochromatic light source module, the light detection circuit and signal processing module. The structure of the sensor was also preliminarily designed.

关键词： Absorbance

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