This paper presents an adaptive-predictive vibration control system using extended Kalman filtering for the joint estimation of system states and model parameters. A fixed-free cantilever beam equipped with piezoceram...
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ISBN:
(纸本)9781629931500
This paper presents an adaptive-predictive vibration control system using extended Kalman filtering for the joint estimation of system states and model parameters. A fixed-free cantilever beam equipped with piezoceramic actuators is used to test the proposed control strategy. Deflection readings taken at the end of the beam are used to reconstruct position and velocity information for a second order state-space system. In addition to the system states, the dynamic model is augmented by the unknown model parameters: stiffness, damping constant and a voltage/force conversion constant;characterizing the actuating effect of the piezoceramic transducers. The states and parameters of this augmented system are estimated in real-time, using a continuous-discrete hybrid extended Kalman filter. The estimated model parameters are used to reconstruct the continuous state-space model of the vibrating system, which in turn is discretized for the predictive controller. The model predictive control algorithm generates state predictions and infinite-horizon quadratic cost prediction matrices based on the updated discrete state-space models. The resulting cost function is then minimized using quadratic programming to find the sequence of optimal but constrained control inputs, from which only the first is utilized in a form of a control voltage send to the piezo actuators, the rest is discarded and the procedure is repeated at the next sampling instant. The proposed active vibration control system is implemented and evaluated experimentally to validate the viability of the control method.
Recent developments in the area of industrial programing software expand the potential of the automation programs considerably. In addition to IEC 61131-3 languages, programming languages like C and C++ are getting av...
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The aim of this paper is to present a nonlinear model-based predictive control (NMPC) for air-fuel ratio (AFR) of spark ignited (SI) engines. Complexity of NMPC implementation causes that the computational requirement...
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ISBN:
(纸本)9781479909261
The aim of this paper is to present a nonlinear model-based predictive control (NMPC) for air-fuel ratio (AFR) of spark ignited (SI) engines. Complexity of NMPC implementation causes that the computational requirements on storage space and online computation time have to be considered in the controller design. Especially a limitation on computation time makes often the optimal control law too complex to be implemented and some suboptimal solution has to be provided to meet the requirements. The point of the paper is to present the controller which utilizes the simplified control problem in a warm-start technique and allows to decrease the online computational effort caused by the nonlinear predictive controller.
In the article are analyzed the possibilities of the real-time data exchange between small mount device (SMD) “Assembleon Topaz X” and PLEX EPR information system. Main objective of the project was not only to desig...
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In the article are analyzed the possibilities of the real-time data exchange between small mount device (SMD) “Assembleon Topaz X” and PLEX EPR information system. Main objective of the project was not only to design solution for the real-time data exchange for the SMD mentioned above, but also to design the standard applicable to all needful machines and PLCs in the factory which are or would be connected with PLEX ERP system (based on the proposed solution). The proposed solution and standard corresponds with the global aim - create extendable modular system for the real-time data integration of the production outputs, states and data with PLEX with all the benefits (e.g. extendibility, connectivity with the various systems and networks, connectivity with the various systems and networks etc.).
This paper defines how to select the correct method or combinations of methods to minimize the impact of production system and common operation. Before any method is chosen it is necessary to know the primary system a...
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This paper defines how to select the correct method or combinations of methods to minimize the impact of production system and common operation. Before any method is chosen it is necessary to know the primary system and its databases structures for optimal use of the actual data structure setup and the best design for the ETL process. Usually databases structures are categorized into groups, which define their quality. Classification helps to find an ideal method for each group and thus design the solution of the ETL process with minimal impact on the data warehouse and production system.
Modeling and control of the extruder temperature field is discussed, a process governed by a nonlinear partial differential equation. Utilizing finite element approximation a discretized input/output representation of...
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ISBN:
(纸本)9781479909261
Modeling and control of the extruder temperature field is discussed, a process governed by a nonlinear partial differential equation. Utilizing finite element approximation a discretized input/output representation of the system is created with the inputs being powers of heaters and output the extruder temperature field. Local linearization is applied at the operating point and the controller is designed based on the lumped-input and distributed-parameter-output systems approach, using the time-space decoupling of system's dynamics. Results are verified experimentally.
Nowadays,the achievement of proper steel billets temperature profile is not the only design priority of induction heaters for hot forming applications. Due to its high operating costs,its design is constantly improvin...
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Nowadays,the achievement of proper steel billets temperature profile is not the only design priority of induction heaters for hot forming applications. Due to its high operating costs,its design is constantly improving in terms of electrical and thermal efficiency. Therefore the more efficient multi-coil design starts to be more used in industrial practice. Numerical model of mentioned heater based on partial differential equations were solved by finite element method in virtual software environment. Primary goal of computer modeling was to investigate the thermal dynamics of four-module heater working in steady-state operation regime. Obtained data were applied to design an advanced control circuit based on distributed parameter systems theory. This may open up the opportunity to make further progress in induction heaters design.
Industrial induction heating represents the environmentally clean, contactless method of steel heating. Same time it has high energy consumption, so in recent years, more efficient modular topology of heaters were int...
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ISBN:
(纸本)9781479909261
Industrial induction heating represents the environmentally clean, contactless method of steel heating. Same time it has high energy consumption, so in recent years, more efficient modular topology of heaters were introduced. Due to its multiple power modules, there is a possibility to apply the distributed parameter system control theory. By the usage of COMSOL Multiphysics solution, the model in the form of lumped-input and distributed-parameter-output system has been built. The process control is performed on the relations between the coil currents fed into four separate modules of heating device and desired billet temperature profile.
A basic control course is taught for electrical engineering students at the University of Debrecen, Hungary. Through two semesters the students get a basic knowledge on control concepts. Every week there are 2 hours o...
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A basic control course is taught for electrical engineering students at the University of Debrecen, Hungary. Through two semesters the students get a basic knowledge on control concepts. Every week there are 2 hours of theoretical lectures immediately followed by 2 hours of MATLAB based interactive computer laboratories. In the curriculum besides the conventional material new aspects of control design such as Youla parametrization have also been included. Practical considerations as e.g. controller saturation are also dealt with. The paper reviews briefly the curriculum and the educational process of this program.
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