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A New Approach To Reduce The Non-Linear Characteristics Of A Stressed Power System By Using The Normal Form Technique In The Control Design Of The Excitation System, Hadi Lomei, Danny Sutanto, Kashem M. Muttaqi, Mohsen Assili
A New Approach To Reduce The Non-Linear Characteristics Of A Stressed Power System By Using The Normal Form Technique In The Control Design Of The Excitation System, Hadi Lomei, Danny Sutanto, Kashem M. Muttaqi, Mohsen Assili
Faculty of Engineering and Information Sciences - Papers: Part A
In this paper, a new approach is presented to reduce the nonlinear characteristics of a stressed power system by reducing its second-order modal interaction through retuning some parameters of the generator excitation system. In order to determine the second-order modal interaction of the system, a new index on nonlinearity is developed using normal form theory. Using the proposed index of nonlinearity, a sensitivity function is formed to indicate the most effective excitation system parameters in the nonlinear behavior of the system. These dominant parameters are tuned to reduce the second-order modal interaction of the system and to reduce the index …
Modeling And Current Control Strategy For A Medium-Voltage Cascaded Multilevel Statcom With Lcl Filter, Xuehua Zhao, Liping Shi, Libing Chen, Zhenglong Xia, A R. Bendre
Modeling And Current Control Strategy For A Medium-Voltage Cascaded Multilevel Statcom With Lcl Filter, Xuehua Zhao, Liping Shi, Libing Chen, Zhenglong Xia, A R. Bendre
Faculty of Engineering and Information Sciences - Papers: Part A
The Static Synchronous Compensator (STATCOM a.k.a. SVG) is widely used to regulate dynamic reactive power and to solve dynamic voltage stability problems. Modeling shows that a cascaded STATCOM, which is composed of several cascaded H-bridges, not only has strong coupling characteristics when an LCL filter is added but it is also a non-linear, multivariable system. Therefore, its practical design and application are difficult to mplement. In this paper an internal decoupling control algorithm is introduced to provide independent control of the active and reactive currents. Decoupling control algorithms are proposed, and models and simulation of the decoupling are provided. We …
Optimal Distribution Control Of Non‐Linear Tire Force Of Electric Vehicles With In‐Wheel Motors, Boyuan Li, Haiping Du, Weihua Li
Optimal Distribution Control Of Non‐Linear Tire Force Of Electric Vehicles With In‐Wheel Motors, Boyuan Li, Haiping Du, Weihua Li
Faculty of Engineering and Information Sciences - Papers: Part A
An over-actuated control system has the advantage of being able to use redundant actuators to reconfigure the control system and it can realize fault tolerant control. In order to achieve improved vehicle stability and handling performance for electric vehicles with in-wheel steering and driving motors, the control of the vehicle body slip angle and yaw rate is actually an over-actuated control problem. To obtain the optimal solution for this control problem, this study proposes a two-level tire force distribution control method, where the upper level controller calculates the desired lateral and longitudinal forces generated by friction on the tire of …
A Decentralized Multiagent-Based Voltage Control For Catastrophic Disturbances In A Power System, Sk. Razibul Islam, Kashem M. Muttaqi, Danny Sutanto
A Decentralized Multiagent-Based Voltage Control For Catastrophic Disturbances In A Power System, Sk. Razibul Islam, Kashem M. Muttaqi, Danny Sutanto
Faculty of Engineering and Information Sciences - Papers: Part A
In this paper, a multiagent-based voltage and reactive power control in the case of a multiple contingency is presented. Incorporating the agent-based autonomous feature to the intelligence of the remote terminal units, the present power system control structure can be used to help in preventing system voltage collapse during catastrophic disturbances. The control algorithm is based on a decentralized architecture of intelligent agents and the determination of a local zone that can carry out quick countermeasures in a decentralized manner as a multiagent system (MAS) during an emergency situation. An adaptive determination of the local zones undergoing voltage collapse has …
Direct Power Control Of Dfig Based Wind Turbine Based On Wind Speed Estimation And Particle Swarm Optimization, Mehrdad Tarafdar Hagh, S Roozbehani, F Najaty, S Ghaemi, Yingjie Tan, Kashem M. Muttaqi
Direct Power Control Of Dfig Based Wind Turbine Based On Wind Speed Estimation And Particle Swarm Optimization, Mehrdad Tarafdar Hagh, S Roozbehani, F Najaty, S Ghaemi, Yingjie Tan, Kashem M. Muttaqi
Faculty of Engineering and Information Sciences - Papers: Part A
This paper presents a direct power control (DPC) design of a grid connected doubly fed induction generator (DFIG) based wind turbine system in order to track maximum absorbable power in different wind speeds. A generalized regression neural network (GRNN) is used to estimate wind speed and thereby the maximum absorbable power is determined online as a function of wind speed. Finally the proposed DPC strategy employs a nonlinear robust sliding mode control (SMC) scheme to calculate the required rotor control voltage directly. The concept of sliding mode control is incorporated into particle swarm optimization (PSO) to determine inertial weights. The …
Simple Structure For Reactive Power Control Of Ac Photovoltaic Modules, Viet Thang Tran, Danny Sutanto, Kashem M. Muttaqi
Simple Structure For Reactive Power Control Of Ac Photovoltaic Modules, Viet Thang Tran, Danny Sutanto, Kashem M. Muttaqi
Faculty of Engineering and Information Sciences - Papers: Part A
The objective of this paper is to propose a simple structure for reactive power control (RPC) of AC Photovoltaic (AC PV) modules. With the proposed structure, a cost-effective microcontroller can be adopted to achieve an effective reactive power control in order to support the grid voltage within acceptable bounds by absorbing or supplying reactive power. Moreover, the sliding mode control (SMC) is adopted to enhance the current control's dynamic response and reduce the current harmonic distortion. Comprehensive simulation of an AC PV module connected to grid using PSIM software with different operation modes are used to demonstrate the control strategy. …
Robust Position Control Of A Novel Series Elastic Actuator Via Disturbance Observer, Emre Sariyildiz, Gong Chen, Haoyong Yu
Robust Position Control Of A Novel Series Elastic Actuator Via Disturbance Observer, Emre Sariyildiz, Gong Chen, Haoyong Yu
Faculty of Engineering and Information Sciences - Papers: Part B
This paper proposes a new robust position control method for a novel series elastic actuator (SEA). It is a wellknown fact that SEAs provide many benefits in force control, e.g., lower reflected inertia and impedance, greater shock tolerance, safety, and so on. However, current SEA designs have a common performance limitation due to the compromise on the selection of spring stiffness. The performance of an SEA can be significantly improved by changing the stiffness of the spring; however, designing a variable-stiffness SEA is a quite challenging task. In this paper, a novel variable-stiffness SEA, which can relax the fundamental performance …
Suboptimal Mppt Control For Power Management In Pv-Diesel Remote Area Power Supply Systems, Yingjie Tan, Lasantha G. Meegahapola, Kashem M. Muttaqi
Suboptimal Mppt Control For Power Management In Pv-Diesel Remote Area Power Supply Systems, Yingjie Tan, Lasantha G. Meegahapola, Kashem M. Muttaqi
Faculty of Engineering and Information Sciences - Papers: Part A
Maximum power point tracking (MPPT) is commonly being used in solar-photovoltaic (PV) power generation systems to maximise solar energy extraction. In this paper it is proposed to operate the solar-PV system at the suboptimal MPPT to manage power balance in a remote area power supply (RAPS) system. This is performed based on three different operating modes: 1) Frequency control mode; 2) Active power control mode; 3) MPPT control mode. The operating modes are decided based on the load level and the operating mode of the diesel generator (i.e. synchronous condenser mode or generator mode). This power management strategy balances the …
Thin Strip Profile Control Capability Of Roll Crossing And Shifting In Cold Rolling Mill, Abdulrahman Aljabri, Zhengyi Jiang, Dongbin Wei, Xiaodong Wang, Hassan Tibar
Thin Strip Profile Control Capability Of Roll Crossing And Shifting In Cold Rolling Mill, Abdulrahman Aljabri, Zhengyi Jiang, Dongbin Wei, Xiaodong Wang, Hassan Tibar
Faculty of Engineering and Information Sciences - Papers: Part A
Controlling cold strip profile is a difficult and significant problem has been found in industry during thin strip rolling. At present choosing the new type of strip rolling mill is the one of main methods to control the strip shape quality in cold rolling. The influences of rolling process parameters such as the work roll cross angle and work roll shifting on the strip shape and profile of thin strip are recognised throughout this study. The results show that the roll crossing and shifting is efficient way to control the strip shape. The increase of the work roll crossing angle …
Control Issues Of Distribution System Automation In Smart Grids, Kashem M. Muttaqi, Ali Esmaeel Nezhad, Jamshid Aghaei, Velappa Ganapathy
Control Issues Of Distribution System Automation In Smart Grids, Kashem M. Muttaqi, Ali Esmaeel Nezhad, Jamshid Aghaei, Velappa Ganapathy
Faculty of Engineering and Information Sciences - Papers: Part A
In recent years, the world has been exposed to many developments in different areas esp. computer technology, resulting in computers with high power of processing to be built. Among these devices, intelligent electronic devices (IEDs) have the capability to process considerable volume of data at high speed. Since, real-time data processing is vital in distribution networks as the largest users during their operation, IEDs would be applicable in such systems. In addition to IEDS, communication systems have improved during recent decades, providing the desired conditions for a concept known as distribution system automation (DSA) which has been discussed in this …
K-Times Attribute-Based Anonymous Access Control For Cloud Computing, Joseph K. Liu, Tsz Hon Yuen, Man Ho Au, Xinyi Huang, Willy Susilo, Jianying Zhou
K-Times Attribute-Based Anonymous Access Control For Cloud Computing, Joseph K. Liu, Tsz Hon Yuen, Man Ho Au, Xinyi Huang, Willy Susilo, Jianying Zhou
Faculty of Engineering and Information Sciences - Papers: Part A
In this paper, we propose a new notion called k-times attribute-based anonymous access control, which is particularly designed for supporting cloud computing environment. In this new notion, a user can authenticate himself/herself to the cloud computing server anonymously. The server only knows the user acquires some required attributes, yet it does not know the identity of this user. In addition, we provide a k-times limit for anonymous access control. That is, the server may limit a particular set of users (i.e., those users with the same set of attribute) to access the system for a maximum k-times within a period …
Modeling And Inverse Feedforward Control For Conducting Polymer Actuators With Hysteresis, Xiangjiang Wang, Gursel Alici, Xiaobo Tan
Modeling And Inverse Feedforward Control For Conducting Polymer Actuators With Hysteresis, Xiangjiang Wang, Gursel Alici, Xiaobo Tan
Faculty of Engineering and Information Sciences - Papers: Part A
Conducting polymer actuators are biocompatible with a small footprint, and operate in air or liquid media under low actuation voltages. This makes them excellent actuators for macro- and micro-manipulation devices, however, their positioning ability or accuracy is adversely affected by their hysteresis non-linearity under open-loop control strategies. In this paper, we establish a hysteresis model for conducting polymer actuators, based on a rate-independent hysteresis model known as the Duhem model. The hysteresis model is experimentally identified and integrated with the linear dynamics of the actuator. This combined model is inverted to control the displacement of the tri-layer actuators considered in …
A Novel Approach For Ramp-Rate Control Of Solar Pv Using Energy Storage To Mitigate Output Fluctuations Caused By Cloud Passing, M J. E Alam, K M. Muttaqi, D Sutanto
A Novel Approach For Ramp-Rate Control Of Solar Pv Using Energy Storage To Mitigate Output Fluctuations Caused By Cloud Passing, M J. E Alam, K M. Muttaqi, D Sutanto
Faculty of Engineering and Information Sciences - Papers: Part A
The variability of solar irradiance with a high ramp-rate, caused by cloud passing, can create fluctuation in the PV output. In a weak distribution grid with a high PV penetration, this can create significant voltage fluctuations. Energy storage devices are used to smooth out the fluctuation using traditional moving average control. However, moving average does not control the ramp-rate directly; rather the ramp-rate depends on previous values of PV output. This paper proposes a strategy where the ramp-rate of PV panel output is used to control the PV inverter ramp-rate to a desired level by deploying energy storage (which can …
Solar Pv And Battery Storage Integration Using A New Configuration Of A Three-Level Npc Inverter With Advanced Control Strategy, Hamid Teymour Ghasemabadi, Danny Soetanto, Kashem M. Muttaqi, Philip Ciufo
Solar Pv And Battery Storage Integration Using A New Configuration Of A Three-Level Npc Inverter With Advanced Control Strategy, Hamid Teymour Ghasemabadi, Danny Soetanto, Kashem M. Muttaqi, Philip Ciufo
Faculty of Engineering and Information Sciences - Papers: Part A
In this paper, a novel configuration of a three-level neutral-point-clamped (NPC) inverter that can integrate solar photovoltaic (PV) with battery storage in a grid-connected system is proposed. The strength of the proposed topology lies in a novel, extended unbalance three-level vector modulation technique that can generate the correct ac voltage under unbalanced dc voltage conditions. This paper presents the design philosophy of the proposed configuration and the theoretical framework of the proposed modulation technique. A new control algorithm for the proposed system is also presented in order to control the power delivery between the solar PV, battery, and grid, which …
Online Voltage Control In Distribution Systems With Multiple Voltage Regulating Devices, Dothinka Ranamuka Rallage, Ashish Agalgaonkar, Kashem Muttaqi
Online Voltage Control In Distribution Systems With Multiple Voltage Regulating Devices, Dothinka Ranamuka Rallage, Ashish Agalgaonkar, Kashem Muttaqi
Faculty of Engineering and Information Sciences - Papers: Part A
Voltage regulation in distribution systems is typically performed with the aid of multiple voltage regulating devices, such as on-load tap changer and step voltage regulators. These devices are conventionally tuned and locally coordinated using Volt/VAR optimization strategies in accordance with the time-graded operation. However, in case of distribution systems with distributed generation (DG), there could be a possibility of simultaneous responses of DG and multiple voltage regulators for correcting the target bus voltage, thereby resulting in operational conflicts. This paper proposes an online voltage control strategy for a realistic distribution system containing a synchronous machine-based renewable DG unit and other …
Optimal Design Of Semi Active Control For Adjacent Buildings Connected By Mr Damper Based On Integrated Fuzzy Logic And Multi-Objective Genetic Algorithm, Mehmet Uz, Muhammad N. S Hadi
Optimal Design Of Semi Active Control For Adjacent Buildings Connected By Mr Damper Based On Integrated Fuzzy Logic And Multi-Objective Genetic Algorithm, Mehmet Uz, Muhammad N. S Hadi
Faculty of Engineering and Information Sciences - Papers: Part A
An optimal design strategy based on genetic algorithms (GA) is proposed for nonlinear hysteretic control devices that prevent pounding damage and achieve the best results in seismic response mitigation of two adjacent structures. An integrated fuzzy controller is used in order to provide the interactive relationships between damper forces and input voltages for MR dampers based on the modified Bouc-Wen model. Furthermore, Linear Quadratic Regulator (LQR) and H2/LQG (Linear Quadratic Gaussian) controllers based on clipped voltage law (CVL) are also used to compare the results obtained by fuzzy controller. This study employs the main objectives of the optimal design that …
Goaf Frictional Ignition And Its Control Measures In Underground Coal Mines, Gaofeng Wang, Ting Ren, Christopher David Cook
Goaf Frictional Ignition And Its Control Measures In Underground Coal Mines, Gaofeng Wang, Ting Ren, Christopher David Cook
Faculty of Engineering and Information Sciences - Papers: Part A
Goaf Frictional Ignition (GFI) poses a serious threat to the safety of underground coal mines, and has caused many underground fires and catastrophic explosions. This paper examined occurrences of GFI incidents and the underlying mechanisms of ignition source and environment. Most of these incidents were attributed to rock on rock frictional ignition. The eventuation of frictional ignition relies on the presence of hot spots with enough incendive ignition energy, which requires a minimum threshold sliding distance and sliding velocity. The incendivity of the environment can be enhanced by the presence of liquid carbon hydrogen, the increase of virgin rock temperature, …
Control Of Conducting Polymer Actuators Without Physical Feedback: Simulated Feedback Control Approach With Particle Swarm Optimization, Xingcan Xiang, Rahim Mutlu, Gursel Alici, Weihua Li
Control Of Conducting Polymer Actuators Without Physical Feedback: Simulated Feedback Control Approach With Particle Swarm Optimization, Xingcan Xiang, Rahim Mutlu, Gursel Alici, Weihua Li
Faculty of Engineering and Information Sciences - Papers: Part A
Conducting polymer actuators have shown significant potential in articulating micro instruments, manipulation devices, and robotics. However, implementing a feedback control strategy to enhance their positioning ability and accuracy in any application requires a feedback sensor, which is extremely large in size compared to the size of the actuators. Therefore, this paper proposes a new sensorless control scheme without the use of a position feedback sensor. With the help of the system identification technique and particle swarm optimization, the control scheme, which we call the simulated feedback control system, showed a satisfactory command tracking performance for the conducting polymer actuator's step …
An Adaptive Neuro Fuzzy Hybrid Control Strategy For A Semiactive Suspension With Magneto Rheological Damper, Pipit Wahyu Nugroho, Weihua Li, Haiping Du, Gursel Alici, Jian Yang
An Adaptive Neuro Fuzzy Hybrid Control Strategy For A Semiactive Suspension With Magneto Rheological Damper, Pipit Wahyu Nugroho, Weihua Li, Haiping Du, Gursel Alici, Jian Yang
Faculty of Engineering and Information Sciences - Papers: Part A
The main function of a vehicle suspension system is to isolate the vehicle body from external excitation in order to improve passenger comfort and road holding and to stabilise its movement. This paper considers the implementation of an adaptive neuro fuzzy inference system (ANFIS) with a fuzzy hybrid control technique to control a quarter vehicle suspension system with a semiactive magneto rheological (MR) damper. A quarter car suspension model is set up with an MR damper and a semiactive controller consisting of a fuzzy hybrid skyhook-groundhook controller and an ANFIS model is also designed. The fuzzy hybrid controller is used …
Vibration Control Of Vehicle Seat Integrating With Chassis Suspension And Driver Body Model, Haiping Du, Weihua Li, Nong Zhang
Vibration Control Of Vehicle Seat Integrating With Chassis Suspension And Driver Body Model, Haiping Du, Weihua Li, Nong Zhang
Faculty of Engineering and Information Sciences - Papers: Part A
Vehicle seat suspension is one of very important components to provide ride comfort, in particular, commercial vehicles, to reduce driver fatigue due to long hours driving. This paper presents a study on active control of seat suspension to reduce vertical vibration transmitted from uneven road profile to driver body. The control problem will be firstly studied by proposing an integrated seat suspension model which includes vehicle chassis suspension, seat suspension, and driver body model. This is a new concept in the field of study because most of the current active and semi-active seat suspension studies only consider seat suspension or …
Capability Curve Based Enhanced Reactive Power Control Strategy For Stability Enhancement And Network Voltage Management, Lasantha Meegahapola, Tim Littler, Sarath Perera
Capability Curve Based Enhanced Reactive Power Control Strategy For Stability Enhancement And Network Voltage Management, Lasantha Meegahapola, Tim Littler, Sarath Perera
Faculty of Engineering and Information Sciences - Papers: Part A
Reactive power has become a vital resource in modern electricity networks due to increased penetration of distributed generation. This paper examines the extended reactive power capability of DFIGs to improve network stability and capability to manage network voltage profile during transient faults and dynamic operating conditions. A coordinated reactive power controller is designed by considering the reactive power capabilities of the rotor-side converter (RSC) and the grid-side converter (GSC) of the DFIG in order to maximise the reactive power support from DFIGs. The study has illustrated that, a significant reactive power contribution can be obtained from partially loaded DFIG wind …
Inertial Sensing For Human Motor Control Symmetry In Injury Rehabilitation, Matthew Field, David Stirling, Montserrat Ros, Zengxi Stephen Pan, Fazel Naghdy
Inertial Sensing For Human Motor Control Symmetry In Injury Rehabilitation, Matthew Field, David Stirling, Montserrat Ros, Zengxi Stephen Pan, Fazel Naghdy
Faculty of Engineering and Information Sciences - Papers: Part A
This paper proposes a series of methods for representing changes in human motion during injury rehabilitation using Micro-Electro-Mechanical Systems (MEMS) inertial sensors. Tracking the changes over a recovery period requires methods for evaluating the similarity of movement in an impaired state against a non-impaired state. We investigate the use of motion analyses such as the centre of mass (COM) tipping distance, the variance of joint velocity eigenvalues and the cumulative state changes of Gaussian mixture models (GMM) for monitoring the symmetry between the left and right sides of body during rehabilitation exercises. The methods are tested on an injured athlete …
Towards Improved Steel Alloy Designs For Control Of Weld Heat Affected Zone Properties, F J. Barbaro, Z Zhu, L Kuzmikova, H Li, J M. Gray
Towards Improved Steel Alloy Designs For Control Of Weld Heat Affected Zone Properties, F J. Barbaro, Z Zhu, L Kuzmikova, H Li, J M. Gray
Faculty of Engineering and Information Sciences - Papers: Part A
This paper reviews the current technology related to control of weld HAZ properties in high strength steels. The debate related to appropriate balance of Ti and N is addressed and it appears that a stoichiometric ratio provides optimum fracture toughness. The results are significant because despite the well established difficulties in controlling Ti/N ratio, this data now provides guidance in terms of alloy design to achieve optimum fracture toughness in the HAZ of welds. The enhanced resistance to grain coarsening behaviour of high Nb steels has now provided another incremental improvement in the weldability of steels for critical applications such …
Fuzzy Control Of A Conjugated Polymer Actuator, Mohammadreza Sabetghadam, Mehmet Itik, Gursel Alici
Fuzzy Control Of A Conjugated Polymer Actuator, Mohammadreza Sabetghadam, Mehmet Itik, Gursel Alici
Faculty of Engineering and Information Sciences - Papers: Part A
Polypyrrole actuators may represent time varying and nonlinear dynamics as the solvent evaporation continuously affects their performance. Linear models can be used to design controllers for polypyrrole actuators to some extent but their performance may not be sufficient in order to comply with the requirements for applications where high precision is necessary. This paper proposes a Fuzzy Logic controller to improve the tracking performance of a trilayer polypyyrole conducting polymer actuator. As the fuzzy controller does not require a model for the system, the nonlinearities and uncertainties can be handled effectively. Experimental results show that fuzzy control improves the tracking …
Novel Modulation And Control Strategy For Five-Level Anpc Converter With Unbalanced Dc Voltage Applied To A Single-Phase Grid Connected Pv System, Hamid R. Teymour, Danny Sutanto, Kashem M. Muttaqi, Phil Ciufo
Novel Modulation And Control Strategy For Five-Level Anpc Converter With Unbalanced Dc Voltage Applied To A Single-Phase Grid Connected Pv System, Hamid R. Teymour, Danny Sutanto, Kashem M. Muttaqi, Phil Ciufo
Faculty of Engineering and Information Sciences - Papers: Part A
This paper proposes a new control strategy and a novel modulation technique for a grid-connected photo-voltaic (PV) system using a single-phase five-level flying capacitor (FC) based active-neutral-point-clamped (ANPC) converter. The proposed modulator can control the FC voltage to follow the requested reference value and simultaneously generate the required ac output voltage regardless of the values of the dc capacitor voltages of the converter. By implementing this method, smaller values of dc-link and flying capacitors can be used even in applications that could experience ripple or transient in the capacitors voltage. In the grid-connected single-phase five-level ANPC, where the capacitors can …
Point Of Common Coupling (Pcc) Voltage Control Of A Grid-Connected Solar Photovoltaic (Pv) System, Brian K. Perera, Philip Ciufo, Sarath Perera
Point Of Common Coupling (Pcc) Voltage Control Of A Grid-Connected Solar Photovoltaic (Pv) System, Brian K. Perera, Philip Ciufo, Sarath Perera
Faculty of Engineering and Information Sciences - Papers: Part A
In future low voltage grids, with multiple inverter interfaced sources connected, voltage regulation may become a necessary task. The potential exists for inverter interfaced sources to be deployed to regulate the voltage at the point of common coupling (PCC) of each inverter interfaced sources. The PCC voltage regulation is attainable with inverter interfaced sources by dynamically controlling the amount of reactive power injected to the power distribution grid by individual systems. In the current research, a closed-loop controller is proposed to regulate the PCC voltage of a solar photovoltaic (PV) system that is connected to a single-phase power distribution feeder …
A Maximum Principle For Optimal Control Of Stochastic Evolution Equations, Kai Du, Qingxin Meng
A Maximum Principle For Optimal Control Of Stochastic Evolution Equations, Kai Du, Qingxin Meng
Faculty of Engineering and Information Sciences - Papers: Part A
A general maximum principle is proved for optimal controls of abstract semilinear stochastic evolution equations. The control variable and linear unbounded operators act in both drift and diffusion terms, and the control set need not be convex. Read More: http://epubs.siam.org/doi/abs/10.1137/120882433
Integrated Seat And Suspension Control For A Quarter Car With Driver Model, Haiping Du, Weihua Li, Nong Zhang
Integrated Seat And Suspension Control For A Quarter Car With Driver Model, Haiping Du, Weihua Li, Nong Zhang
Faculty of Engineering and Information Sciences - Papers: Part A
In this paper, an integrated vehicle seat and sus pension control strategy for a quarter car with driver model is proposed to improve suspension performance on driver ride comfort. An integrated seat and suspension model that includes a quarter-car suspension, a seat suspension, and a 4-degree-of freedom (DOM) driver body model is presented first. This in1 tegrated model provides a platform to evaluate ride comfort 1performance in terms of driver head acceleration responses under typical road disturbances and to develop an integrated control of seat and car suspensions. Based on the integrated model, an H∞ state feedback controller is designed …
Robust Yaw Moment Control For Vehicle Handling And Stability, Haiping Du, Nong Zhang, Wade Smith
Robust Yaw Moment Control For Vehicle Handling And Stability, Haiping Du, Nong Zhang, Wade Smith
Faculty of Engineering and Information Sciences - Papers: Part A
This paper presents a robust yaw moment controller design approach for improving vehicle handling and stability. With considering the parameter-varying property of tyre cornering stiffness in extreme handling situations, a linear parameter-varying (LPV) model in polytopic form is constructed to represent the nonlinear characteristics of tyres. A yaw moment controller is then designed for the LPV model which aims at optimising the tracking performance on both yaw rate and sideslip angle with respect to their targets. The conditions for designing such a controller are derived in terms of linear matrix inequalities (LMIs). Numerical simulations on a nonlinear vehicle model are …
Control Of Five-Level Flying Capacitor Based Active-Neutral-Point-Clamped Converter For Grid Connected Wind Energy Applications, Sridhar R. Pulikanti, Kashem Muttaqi, D Suntanto
Control Of Five-Level Flying Capacitor Based Active-Neutral-Point-Clamped Converter For Grid Connected Wind Energy Applications, Sridhar R. Pulikanti, Kashem Muttaqi, D Suntanto
Faculty of Engineering and Information Sciences - Papers: Part A
Integration of wind energy sources into the distribution grid affects the voltage profile that could be stabilized through the grid reinforcement or limiting the active power injection. This paper presents a control strategy to regulate the voltage at point of common coupling (PCC) through reactive power exchange to the grid. The reactive power capability of the grid-connected hybrid multilevel converter is based on the voltage sensitivity of the distribution grid at PCC. A hybrid five-level multilevel converter referred as flying capacitor (FC) based active-neutral-point-clamped (ANPC) converter is considered. It is an arrangement of a three-level ANPC converter and a two-level …