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IEEE International Conference on control system, Computing and engineering (ICCSCE)

作者： Mashitah Che Razali Norhaliza Abdul Wahab M. F. Rahmat S. I. Samsudin Department of Control and Instrumentation Engineering Faculty of Electrical Engineering Universiti Teknologi Malaysia Skudai Malaysia Department of Industrial Electronics Faculty of Electrical and Electronics Universiti Teknikal Malaysia Melaka Durian Tunggal Melaka Malaysia

This paper addresses two different control strategies for multivariable system. The analyzed control strategies are based on Davison and Penttinen-Koivo method. The aims of the study are to investigate the differences in the performance of static and dynamic control for wastewater treatment plant. The method proposed by Davison and Penttinen- Koivo was modified to measure the dynamic characteristic of the wastewater treatment plant. The simulations are tested using Matlab/ Simulink with several tuning parameters. Finally, the simulation graph is provided to illustrate the efficiency of the proposed approach. It was found that the presence of dynamic control is able to keep the output concentration at the desired level with the changes of input concentration, unlike static control which only able to control system with static inputs.

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Online subspace identification methods for MIMO model

Online subspace identification methods for MIMO model

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IEEE Conference on control, systems & Industrial Informatics (ICCSII)

作者： I. W. Jamaludin N. A. Wahab M. F. Rahmat S. Sahlan Department of Mechatronics Faculty of Electrical Engineering Universiti Teknikal Malaysia Melaka Malaysia Control and Instrumentation Department Faculty of Electrical Engineering Universiti Teknologi Malaysia Malaysia Universiti Teknologi Malaysia Skudai Johor MY

Subspace model identification (SMI) has been a highly interest of research topic in recent years. Subspace methods such as Multivariable Output Error State Space (MOESP) and Numerical algorithms for Subspace State Space system Identification (N4SID) algorithms are well known and often implemented especially for multivariable identification due to the use of robust numerical tools such as the QR decomposition and singular value decomposition (SVD). SMI algorithms are attractive not only because of their numerical stability and simplicity, but also for the state space form that is very suitable in estimating, predicting, filtering and control design. Several simulation studies for MOESP and N4SID algorithms performed in online version are presented. This paper focuses on computation time, order selection and the stability from both methods when performed online.

关键词： Matrix decomposition Numerical models Fitting Integrated circuits MATLAB

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The Design of Load/Unload Algorithm for 2.5" Hard Disk Drive in SSTW Process

The Design of Load/Unload Algorithm for 2.5" Hard Disk Drive...

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IEEE Conference on Industrial Electronics and Applications

作者： Watsamon Nakharin Vichitpon Boonpranchoo Vittaya Tipsuwanporn Arjin Numsomran Department of Servo Track Writing Hitachi Global Storage Technologies (Thailand) Ltd. Department of Instrumentation and Control Engineering Faculty of Engineering King Mongkut's Institute of Technology Ladkrabang

ISBN: (纸本)9781457721182

To prevent striking of head to disc in servo track writing process, head velocity is controlled by ramp loading procedure for moving read/write head from ramp to disc surface properly. The author presents the approach to design load/unload algorithm for 2.5" hard disk drive in SSTW process. The 2 Degree of Freedom PID control Structure has been applied instead of conventional PID for VCM velocity control. Furthermore;we use Characteristic Ratio Assignment Technique for adjusting PID parameters in order to obtain less overshoot in output response. The experimental results tested with self-servo track writer PH4LC unit have been shown that 2DOF PID algorithm can achieve the performance specification requirement and reducing HDI problem in load/unload control of 2.5" hard disk drive, efficiently.

关键词： Load/Unload Algorithm Hard Disk Drive SSTW

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A LabVIEW-Based Simulator for the Activated Sludge Process

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IFAC Proceedings Volumes 2012年第2期45卷 942-947页

作者： Norhaliza Abdul Wahab Muhammad Sani Gaya Yahaya Md Sam Ulf Jeppsson Reza Katebi Control and Instrumentation Department Faculty of Electrical Engineering Universiti Teknologi MalaysiaUTM Skudai 81310 Johor Malaysia (Tel:+607-5535418) Div of Industrial Electrical Engineering and Automation (IEA) Dept of Measurement Technology and Industrial Electrical Engineering (MIE) Lund University Industrial Control Centre Dept of Electronic and Electrical Engineering University of Strathclyde Glasgow UK

Abstract The activated sludge process is the main process in most urban wastewater treatment systems. It is considered complex in nature, and building its mathematical model in practice becomes difficult. A simple and easy way to build the simulation models for the system is needed. In this paper, a LabVIEW based simulator for the system is presented. LabVIEW offers a highly efficient, simple and flexible platform for simulation and control. Building applications in LabVIEW require less coding, and debugging is easy and fast. The proposed simulator utilizes the Benchmark Simulation Model no.1 (BSM 1) for the biochemical reactor and clarification processes. The operation of the simulator is via a graphical user interface (GUI) built in the LabVIEW environment. The simulation results can be displayed in digital and graphical forms. Simulation results obtained were compared with the results from other software simulation packages in which the COST/IWA Simulation Benchmark has been implemented. The developed simulator is very useful due to its efficiency and accuracy in simulating the wastewater process model. The simulator can serve as a training tool for plant operators/students to provide them with better knowledge and understanding of the process.

关键词： Simulator LabVIEW Activated Sludge Process Wastewater Treatment Plant Simulation Benchmark

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Development of real-time flight simulator for quadrotor

Development of real-time flight simulator for quadrotor

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International Conference on Advanced Computer Science and Information system (ICACSIS)

作者： Joga D. Setiawan Yuhanes D. Setiawan Mochammad Ariyanto Agus Mukhtar Agus Budiyono Laboratory of Control System and Robotics Faculty of Engineering Diponegoro University Indonesia Smart Robot Center AeroSpace Engineering Department Konkuk University South Korea

The purpose of this research is to build a real-time flight simulator for quadrotor systems and verify if the simulator runs in real time. The simulator was constructed by writing the mathematical models of quadrotor dynamic in MATLAB/Simulink. Using xPC Target software environment, three PCs were set up to work in sync to make the simulation run in real time. This paper shows several simulation results of the quadrotor dynamic in three flight directions. These results validate the stable performance of PD controller being used. At the same time it can be revealed that the simulation runs in real time by observing the percentage processing usage of the computer as function of simulation time. The simulator can be very useful for researchers to understand the character of the quadrotor system being developed and for pilots to complete a mission using the quadrotor system.

关键词： Solid modeling Computational modeling Mathematical model Real-time systems Computers Propellers PD control

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Fault detection and isolation for nonlinear systems via HOSM multiple-observer

Fault detection and isolation for nonlinear systems via HOSM...

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8th IFAC Symposium on Fault Detection, Supervision and Safety of Technical Processes, SAFEPROCESS 2012

作者： Ríos, H. Edwards, C. Davila, J. Fridman, L. National Autonomous University of Mexico Electrical Engineering Engineering Faculty C.P. 04510 Mexico D.F. Mexico Control and Instrumentation Research Group Department of Engineering University of Leicester University Road Leicester LE1 7RH United Kingdom National Polytechnic Institute Section of Graduate Studies and Research ESIME-UPT C.P. 07340 Mexico D.F. Mexico Department of Automatic Control CINVESTAV-IPN Mexico D.F. AP-14-740 Mexico

ISBN: (纸本)9783902823090

The fault detection and isolation problem is studied for a class of nonlinear systems. Under structural conditions, a bank of High-Order Sliding-Mode observers is proposed. The value of the equivalent output injection is used for detecting and isolating particular faults in the system. The proposed method provides finite-time isolation of actuator and plant faults. Simulation results support the proposed approach. © 2012 IFAC.

关键词： Fault detection

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controller Design for Simulation control of Intelligent Pneumatic Actuators (IPA) system

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Procedia engineering 2012年 41卷 593-599页

作者： Ahmad ‘Athif Mohd Faudzi Khairuddin bin Osman M.F. Rahmat Nu’man Din Mustafa M. Asyraf Azman Koichi Suzumori Department of Mechatronics and Robotics Engineering Faculty of Electrical Engineering Universiti Teknologi Malaysia 81310 Skudai Malaysia Department of Industrial Electronics Faculty of Electrical and Electronics Universiti Teknikal Malaysia Melaka Hang Tuah Jaya 76100 Durian Tunggal Melaka Malaysia Department of Control and Instrumentation Engineering Faculty of Electrical Engineering Universiti Teknologi Malaysia 81310 Skudai Malaysia Graduate School of Natural Science and Technology Okayama University Okayama Japan

Intelligent Pneumatic Actuators (IPA) is a system for application that requires better control and accuracy. The purpose of this paper is to present a controller design for simulation control of an IPA system using Proportional-Integrative (PI) controller and pole-placement feedback controller. Before the controller is designed, a model identification is used to obtain the plant using transfer function. The flow for the controller design starts with the theory, mathematical calculation, procedures and the implementation of the simulation control by using MATLAB software. Furthermore, simulation results are compared and analyzed to illustrate the performance of the proposed controllers.

关键词： Intelligent Pneumatic Actuator (IPA) system Identification (SI) PI controller Feedback controller

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The effect of functional electrical stimulation (FES) on paraplegic muscle fatigue

The effect of functional electrical stimulation (FES) on par...

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International Colloquium on Signal Processing & Its Applications, CSPA

作者： R. Jailani M. O. Tokhi Faculty of Electrical Engineering Universiti Teknologi MARA Shah Alam Selangor Darul Ehsan Malaysia Department of Automatic Control and System Engineering University of Sheffield UK

Stimulation trains of different combination of frequency and pulse-width can be used to generate the muscle force required to perform a functional task during functional electrical stimulation (FES). However, with repetitive activation, the muscle will fatigue and an increase in either the frequency or the pulse-width of stimulation will be required to enable the targeted muscle force to be maintained. This study compares isometric performance and paraplegic muscle fatigue using two different protocols: protocol 1 uses 5 different stimulation frequencies varying from 10Hz to 50Hz with other parameters fixed; and protocol 2 uses 5 different stimulation pulse-widths varying from 200μs to 400μs with other parameters fixed. This range is selected based on a suitable frequency and a pulse width for paraplegic. Muscle performance is assessed by measuring percent decline in peak force and maximum muscle force for different stimulation frequencies and pulse-widths. A simple rule is introduced to avoid spasm or injury to the leg during FES application. The results from this study show that higher frequency gives faster muscle fatigue and the selection of force required to perform a functional task is important for obtaining the optimum stimulation parameters. Stimulation pulse-width has no significant effect on the muscle fatigue but highly affects the maximum muscle force. The rule proposed is important and is found to be useful to avoid leg injury, spasm or uncomfortable feeling during FES application. This rule also can be used to choose optimum stimulation parameters.

关键词： Muscles Force Fatigue Frequency modulation Neuromuscular stimulation Protocols Torque

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Development of Hamstrings Muscle Model for Paraplegic with Functional Electrical Stimulation

Development of Hamstrings Muscle Model for Paraplegic with F...

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International Conference on Intelligent systems, Modelling and Simulation (ISMS)

作者： R. Jailani M.O. Tokhi Faculty of Electrical Engineering Universiti Teknologi MARA Shah Alam Selangor Darul Ehsan Malaysia Department of Automatic Control and System Engineering University of Sheffield UK

This paper presents the development of paraplegic hamstrings muscle model with Adaptive Neuro-Fuzzy Inference system (ANFIS). A series of experiments using Functional Electrical Stimulation (FES) with different stimulation frequencies, pulse width and pulse duration to investigate the impact on muscle output torque are conducted. The data that is obtained is used to develop the paraplegic hamstrings muscle model. 588 training data and 220 testing data set are used in the development of hamstrings muscle model. The ANFIS hamstrings muscle model is found to be the most accurate muscle model representing paraplegic hamstrings muscle model. The established model is then used to predict the behaviour of the underlying system and will be used in the future for the design and evaluation of various control strategies.

关键词： Muscles Data models Mathematical model Computational modeling Testing Adaptation models Neuromuscular stimulation

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Modeling and Validation of 7-DOF Ride Model for Heavy Vehicle

Modeling and Validation of 7-DOF Ride Model for Heavy Vehicl...

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International Conference on Intelligent systems(ICIS’2012);International Conference on Automotive,Mechanical and Materials engineering(ICAMME’2012);International Conference on Electrical,Electronics and Biomedical engineering(ICEEBE’2012);International Conference on Eco-systems and Biological Sciences(ICEBS’2012);International Conference on Management and Social Sciences(ICMSS’2012);International Conference on Applied Chemistry and Pharmaceutical Sciences(ICACPS’2012)

作者： Syabillah Sulaiman Pakharuddin Mohd Samin Hishamuddin Jamaluddin Roslan Abd Rahman Mohammad Safwan Burhaumudin the Department of Automotive Engineering Faculty of Mechanical Engineering Universiti Teknologi Malaysia (UTM)81300 Skudai Johor Malaysia the Department of System Dynamics and Control Faculty of Mechanical Engineering Universiti Teknologi Malaysia (UTM)81300 Skudai Johor Malaysia

This paper presents the modeling and validation of a 7-degree of freedom (DOF) full vehicle model to study ride performance of a heavy vehicle. To improve suspension control system that can reduce roll over effect and improve ride comfort, dynamic modeling of passive heavy vehicle model was constructed. Such simulation model was developed in MATLAB Simulink software. Several assumptions related to 7-degree of freedom modeling were made and stated in this paper. This heavy vehicle model was validated using vehicle dynamics simulation software known as TruckSim. The validation was done by comparing the simulation results. A ride test was conducted at two different speeds, and the simulation results consist of roll angle, pitch angle, and vehicle body displacement are analyzed.

关键词： Heavy vehicle, MATLAB/Simulink, Ride Model, Validation Model

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