The paper considers hardware in the loop simulation (HILS) of railway traffic re-scheduling during disturbances. The traffic re-scheduling during disturbances is formulated as a mixed integer linear programming (MILP)...
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Rocket is a system with multiple inputs and multiple outputs that has unstable dynamics, non-linear, high order, and sensitive to external disturbances. The mathematical model which represents the dynamics of the rock...
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Rocket is a system with multiple inputs and multiple outputs that has unstable dynamics, non-linear, high order, and sensitive to external disturbances. The mathematical model which represents the dynamics of the rocket has parameters that are usually an approximation, this leads to uncertainty of empirical representations. In addition, wind disturbances can destabilize the movement of the rocket. In this paper, it is proposed the robust MIMO PID controller obtained by using the robust H ∞ synthesis via integral backstepping method for rocket control problems. Synthesis of PID controllers using robust H8 methods in the form of state feedback results in integral backstepping structure and new parameter ρ. PID controller parameters are obtained via the algebraic Riccati equation solution to determine the optimum value of ρ and γ. The controller is tested through a simulation model of a rocket in flight conditions at altitudes of 1.000 meters to 10.000 meters with a wind disturbance and model uncertainties. Simulation results show that the wind disturbance attenuation reaches -46 dB at a frequency of disturbances and μ-analysis in the frequency domain shows that the system is stable robust.
This paper proposes a robust multiplexed model predictive control (MMPC) for a bake plate control system. The bake plate is a multi-inputs multi-outputs (MIMO) system which is required to have uniform temperature. In ...
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This paper proposes a robust multiplexed model predictive control (MMPC) for a bake plate control system. The bake plate is a multi-inputs multi-outputs (MIMO) system which is required to have uniform temperature. In bake plate sytem, the controller must be able to reduce the disturbances caused when placing a cold wafer inside. Results show that the proposed robust MMPC can outperform in attenuating disturbance compare with the MMPC and the standard MPC.
The paper considers hardware in the loop simulation (HILS) of railway traffic re-scheduling during disturbances. The traffic re-scheduling during disturbances is formulated as a mixed integer linear programming (MILP)...
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The paper considers hardware in the loop simulation (HILS) of railway traffic re-scheduling during disturbances. The traffic re-scheduling during disturbances is formulated as a mixed integer linear programming (MILP) solved by using branch and bound algorithm. The HILS apparatus is then set-up to verify the results.
One of the well known industrial data communication protocols is Modbus which is widely used in industrial automation due to its availability. Modbus protocol can be implemented in many ways according to its network. ...
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One of the well known industrial data communication protocols is Modbus which is widely used in industrial automation due to its availability. Modbus protocol can be implemented in many ways according to its network. Performance metrics and tests for IT infrastructure equipment have been used for many years, but now with real-time communication being used more, users are asking whether their desktop, laptop, or palm computer can handle the performance requirements of these network intensive applications. In this paper, Ethernet communication called Modbus TCP/IP will be tested. An extension of the Ethernet network with serial RS485 network will also be considered in relation with two different network topologies.
Industrial Ethernet and wireless network become a common platform to implement industrial control in industries. Network control systems are subjected to delay time uncertainties due to the load traffic in the network...
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Industrial Ethernet and wireless network become a common platform to implement industrial control in industries. Network control systems are subjected to delay time uncertainties due to the load traffic in the networks. As the PID controller is a major control algorithm in industries, this paper proposes a LMI based robust H infin PID controller using robust integral backstepping method to compensate the delay time uncertainties. To design using robust integral backstepping method, the plant and the PID controller are represented as a full state feedback control system in state space representation. The obtained parameters can then be used in the installed PID controller in the network based industrial control systems.
作者：
SEJD, JJWATKINSON, KWHILL, WFMr. James J. Sejd received his B.S. degree in Civil Engineering from Case
Western Reserve University and has since undergone considerable graduate study at both The George Washington and American Universities. He served almost four years in the U.S. Navy as a Naval Aviator and enjoys the unique distinction of being qualified in both Heavier- and Lighter-than-Air aircraft. Early in his career he was employed at the Navy's Bureau of Ships in the capacity of a Structural Designer and Structural Research Monitor. In 1966 he joined the Staff of the Center for Naval Analyses where he was involved in the mathematical modeling of ships and aircraft and in economic “trade-off‘ analysis. In 1970. he went to the Naval Ship Engineering Center as an Operations Research Analyst in the Ship Design and Development Division. At the present time he is employed as a Program Manager for the Naval Sea Systems Command Ship Design Research and Development Office. A member of ASNE since 1973 he also is a member of the Association of Scientists and Engineers at NAVSEA the Operations Research Society of America and the Lighter-Than-Air Society. Mr. Kenneth W. Watkinson received both is B.S. and M.S. degrees in Engineering Science from Florida State University in 1970 and 1971 respectively. Since graduation
he has been employed at the Naval Coastal Systems Center (NCSC). Panama City. Fla. where he is primarily involved in the investigation of the stability and control of underwater vehicles. For the past four years he has been the Task Leader and Principal Investigator for the NCSC portion of the Advanced Submarine Control Program involved in developing control design methods and the instrumentation system for the Submarine Control System Test Vehicle. Mr.
William F. Hill is currently the ASCOP Program Manager at Lockheed Missiles & Space Company (LMSC) Inc. where he has the overall responsibility for design and construction of the Control System Test Vehicle (CSTV). He entered the aircraft industry in England as an Apprentice w
As part of the Advanced Submarine controlprogram (ASCOP), the Naval Sea Systems Command has developed an open water Submarine control System Test Vehicle (CSTV). This vehicle is a 1/12 scale model of an SSN 688 Class...
As part of the Advanced Submarine controlprogram (ASCOP), the Naval Sea Systems Command has developed an open water Submarine control System Test Vehicle (CSTV). This vehicle is a 1/12 scale model of an SSN 688 Class Submarine, with provisions for easy geometric changes. Such changes include alternate Sail size and location, the addition of parallel middle-bodies, alternative tail sections, and alternative control configurations. A self-contained instrumentation and control system provides the capability for “on-board” recording of all relevant Submarine-state variables, over the entire speed and depth range, to a degree of data accuracy exceeding any known system. With the means thus available to correlate measured vehicle hydrodynamics with selected maneuvers, conditions, and changes in hull geometry and control surface configuration, modern mathematical techniques for improving submarine equations of motion can be employed to permit dramatic design enhancements in both safety and performance. This paper provides the rationale and history of the development of this vehicle, a description of the instrumentation and control package, and a description of the vehicle itself.
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