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Anti-windup embedded magnetic actuator applied for near-high-speed milling

INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY 2013年第5-8期64卷 669-679页

作者： Lee, Rong-Mao Tsai, Nan-Chyuan Natl Cheng Kung Univ Dept Mech Engn Tainan 70101 Taiwan

A fuzzy anti-windup (AW) compensator is proposed and applied to the embedded cylindrical-array magnetic actuator (ECAMA) to ensure the superior performance of spindle position regulation for milling machines under actuator saturation. Since ECAMA is a type of active magnetic bearing (AMB), the supplied coil current and the induced magnetic force are both limited by the maximum current and power output of the AMB and the associated amplifier. Once the magnetic actuator is saturated, the required control input cannot be realized by ECAMA and may lead to drastic tremble of spindle position. In this work, an AW compensator, based on fuzzy logic algorithm, is therefore proposed to rectify the control input to ECAMA. By employing commercial software MATLAB/Simulink and signal processing interface, Module DS1104 by dSPACE, the efficacy of the fuzzy AW compensation is practically verified by intensive experiments.

关键词： Active magnetic bearing Saturation of actuator fuzzy logic algorithm

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Design of Integrated Scheduling and Automated Controlling for Surface Treatment Process using Supervisory Control and Data Acquisition (SCADA)

Design of Integrated Scheduling and Automated Controlling fo...

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IEEE International Conference on Industrial Engineering and Engineering Management (IEEM)

作者： Damayanti, D. D. Rachmat, H. Atmaja, D. S. Inst Teknol Telkom Dept Ind Engn Bandung Indonesia

ISBN: (纸本)9781479909865

This paper aims to design a model of integrated scheduling and automated controlling for a surface treatment process in an aircraft manufacturing company, where in this case aircraft parts are dyed into chemical liquid to be corrosion-proof. In the existing plant, parts dyeing processes (moving the crane and monitoring the tanks temperature) are done manually. Integrated scheduling and automation control system is proposed to improve planning, control and safety issues in the dyeing process. The scheduling system is developed using fuzzy logic algorithm to minimize makespan and the automation system is designed based on Supervisory Control and Data Acquisition (SCADA). A case study has shown that the simulation of proposed model can result in reducing makespan of about 51,3 % and the schedule can be implemented automatically in the surface treatment prototype.

关键词： Scheduling fuzzy logic algorithm SCADA Automation

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Traffic Crash Modeling Considering Inconsistent Observations, Interaction Behavior, and Nonlinear Relationships

Traffic Crash Modeling Considering Inconsistent Observations...

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作者： Lao, Yunteng University of Washington

学位级别：Ph.D.

Traffic collisions are a worldwide issue that can cause injury and death, which leads to billions of dollars in damages every year. Significant research efforts have been undertaken to develop and utilize statistical modeling techniques for analyzing the characteristics of crash count data. While these modeling techniques have been providing meaningful outputs, improvements on these modeling methods still need to better understand the crash risk and the contributing factors. Five important issues in crash data modeling are identified in this research. The first two issues are over or under dispersion with crash data and excess zeros within crash records. Considering that they have been well studied in the previous research, this study focuses on the remaining three major issues. The first one is relevant to the partial observations of multiple processes, i.e. crash data may be collected by different agencies that create multiple data sources and may be inconsistent. A modeling mechanism that takes advantage of all datasets for better estimation results is highly desirable. The second one is an interaction issue. Some collisions are single vehicle crashes, such as off-road crashes and rollover incidents, and some collisions involve interaction behavior, such as the Animal-Vehicle Collision (AVC) and the Vehicle-Vehicle Collision. The characteristics of crashes with interaction behavior are different from those with only one vehicle involved. It is challenging to develop a crash modeling scheme that can capture the interaction behavior. The last one is the nonlinear relationship issue. Most previous collision models are Generalized Linear Model-based (GLM-based) approaches. Such GLM-based approaches are constrained by their linear model specifications because, in most situations, the relationship between the crash rate and its contributing factors are not linear or may not even be monotonic. Thus, finding a way to model the collision data with nonlinear and non-monoto

关键词： Count data modeling Diagonal inflated bivariate Poisson regression fuzzy logic algorithm Generalized Linear Model Generalized Nonlinear Model Transportation safety Civil engineering

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fuzzy compensator design against windup of a magnetic actuator during milling operation

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PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART B-JOURNAL OF ENGINEERING MANUFACTURE 2012年第B9期226卷 1454-1464页

作者： Lee, Rong-Mao Tsai, Nan-Chyuan Natl Cheng Kung Univ Dept Mech Engn Tainan 70101 Taiwan

A fuzzy anti-windup compensator is proposed and applied to the embedded cylindrical-array magnetic actuator to ensure the superior performance of spindle position regulation for milling machines under actuator saturation. Since embedded cylindrical-array magnetic actuator is a type of active magnetic bearing, the supplied coil current and the induced magnetic force are both limited by the maximum current and power output of the active magnetic bearing and the associated amplifier. Once the magnetic actuator is saturated, the required control input cannot be realized by an embedded cylindrical-array magnetic actuator and may lead to drastic tremble of the spindle position. In this work, an anti-windup compensator, based on a fuzzy logic algorithm, is therefore proposed to rectify the control input to an embedded cylindrical-array magnetic actuator. By employing commercial software, MATLAB/Simulink, and signal processing interface, Module DS1104 by dSPACE, the efficacy of the fuzzy anti-windup compensation is practically verified by intensive experiments.

关键词： Active magnetic bearing saturation of actuator fuzzy logic algorithm

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fuzzy logic algorithm for mobile robot control

Fuzzy logic algorithm for mobile robot control

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4th International Conference on Informatics in Control, Automation and Robotics

作者： Stoian, Viorel Pana, Cristina Univ Craiova Mechatron Dept Craiova Romania

ISBN: (纸本)9789728865832

This paper presents a fuzzy control algorithm for mobile robots which are moving next to the obstacle boundaries, avoiding the collisions with them. Four motion cycles (programs) depending on the proximity levels and followed by the mobile robot on the trajectory (P1, P2, P3, and P4) are shown. The directions of the movements corresponding to every cycle, for every reached proximity level are presented. The sequence of the programs depending on the reached proximity levels is indicated. The motion control algorithm is presented by a flowchart showing the evolution of the functional cycles (programs). The fuzzy rules for evolution (transition) of the programs and for the motion on X-axis and Y-axis respectively are described. Finally, some simulations are presented.

关键词： fuzzy logic algorithm mobile robots obstacole avoidance trajectory controller

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Position regulator for spindle of milling machine by embedded magnetic bearings

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JOURNAL OF INTELLIGENT MANUFACTURING 2011年第4期22卷 563-574页

作者： Tsai, Nan-Chyuan Shih, Li-Wen Lee, Rong-Mao Natl Cheng Kung Univ Dept Mech Engn Tainan 70101 Taiwan

The goal of this work is to concurrently counter-balance the dynamic cutting force and regulate the spindle position deviation by integrating active magnetic bearing (AMB) technique, fuzzy logic algorithm and an adaptive self-tuning feedback loop. The mathematic model for cutting dynamics is constructed by experiments so that the system parameters can be on-line estimated by employing the proposed fuzzy logic algorithm. Once the cutting force can be real-time estimated, the corresponding compensation force can be exerted by the equipped AMB to counter-balance the cutting force (i.e., via inner-loop), in addition to the spindle position regulation by the feedback of spindle position (i.e., via outer-loop). At the end, the experimental simulations on realistic milling are presented to verify the efficacy of the fuzzy controller for spindle position regulation and the capability of the dynamic cutting force counterbalance.

关键词： Active magnetic bearing Cutting process fuzzy logic algorithm

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Development of a predictive out of step relay using model based design

Development of a predictive out of step relay using model ba...

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2nd IEEE PES International Conference and Exhibition on Innovative Smart Grid Technologies (ISGT Europe)

作者： Kirby, B. Zou, L. Cao, J. Kamwa, I. Heniche, A. Dobrescu, M. Alstom Grid UK St Leonards Ave Stafford ST17 4LX England Inst Rech Hydroquebec IREQ Varennes PQ J3X 1S1 Canada

ISBN: (纸本)9781457714214

This paper describes the development of an out of step relay using model based design (MBD) approach. Results of simulation testing on the model and target are also discussed. The predictive out of step algorithm is used to detect severe power swings and out of step conditions between different sections of a power system. To satisfy the functional specifications, the instability detection must be done in a rapid, reliable and safe way. The development of this device has been carried out in collaboration with Hydro-Quebec. The predictive out of step detection is realized by using fuzzy logic, which processes variables derived from the voltage and current on the transmission line. System level modeling and simulation has been done in Matlab / Simulink. Automated code generation has been used to produce the target software. Target implementation has been successful on the hardware platform.

关键词： Out of step relay instability detection fuzzy logic algorithm model based design

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Spindle vibration suppression for advanced milling process by using self-tuning feedback control

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INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY 2010年第1-4期48卷 1-10页

作者： Tsai, Nan-Chyuan Shih, Li-Wen Lee, Rong-Mao Natl Cheng Kung Univ Dept Mech Engn Tainan 70101 Taiwan

关键词： Active magnetic bearing Cutting process fuzzy logic algorithm

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Counterbalance of cutting force for advanced milling operations

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MECHANICAL SYSTEMS AND SIGNAL PROCESSING 2010年第4期24卷 1191-1208页

作者： Tsai, Nan-Chyuan Shih, Li-Wen Lee, Rong-Mao Natl Cheng Kung Univ Dept Mech Engn Tainan 70101 Taiwan

The goal of this work is to concurrently counterbalance the dynamic cutting force and regulate the spindle position deviation under various milling conditions by integrating active magnetic bearing (AMB) technique, fuzzy logic algorithm and an adaptive self-tuning feedback loop. Since the dynamics of milling system is highly determined by a few operation conditions, such as speed of spindle, cut depth and feedrate, therefore the dynamic model for cutting process is more appropriate to be constructed by experiments, instead of using theoretical approach. The experimental data, either for idle or cutting, are utilized to establish the database of milling dynamics so that the system parameters can be on-line estimated by employing the proposed fuzzy logic algorithm as the cutting mission is engaged. Based on the estimated milling system model and preset operation conditions, i.e., spindle speed, cut depth and feedrate, the current cutting force can be numerically estimated. Once the current cutting force can be real-time estimated, the corresponding compensation force can be exerted by the equipped AMB to counterbalance the cutting force, in addition to the spindle position regulation by feedback of spindle position. On the other hand, for the magnetic force is nonlinear with respect to the applied electric current and air gap, the characteristics of the employed AMB is investigated also by experiments and a nonlinear mathematic model, in terms of air gap between spindle and electromagnetic pole and coil current, is developed. At the end, the experimental simulations on realistic milling are presented to verify the efficacy of the fuzzy controller for spindle position regulation and the capability of the dynamic cutting force counterbalance. (C) 2009 Elsevier Ltd. All rights reserved.

关键词： Active magnetic bearing Cutting process fuzzy logic algorithm

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Reference Slip Ratio Generation and Adaptive Sliding Mode Control for Railway Rolling Stocks

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INTERNATIONAL JOURNAL OF PRECISION ENGINEERING AND MANUFACTURING 2009年第2期10卷 39-44页

作者： Park, Sung Hwan Kim, Jong Shik Choi, Jeong Ju Pusan Natl Univ Sch Mech Engn RIMT Pusan 609735 South Korea

We propose a reference slip ratio generation algorithm that accounts for a large adhesion force to improve the braking performance of railway rolling stocks even if the rail conditions change. Our algorithm is based on fuzzy logic, the efficiency of which was evaluated by comparing the braking distances of rolling stocks using the proposed algorithm and using constant reference slip ratios under various rail conditions. Our proposed slip ratio generation algorithm was used as the basis of an adaptive sliding mode controller for a rolling stocks quarter model. In this design, an adaptive rule was developed using the Lyapunov stability theorem, and the performance of the proposed control system was evaluated by computer simulation.

关键词： Railway rolling stocks Adaptive sliding mode control fuzzy logic algorithm Adhesion force Brake systems

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