[in Japanese]

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[in Japanese]

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[in Japanese]

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[in Japanese]

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Robust control takes designing cost because of it need mathematical model of actual plant and perturbations. We propose the fixed-order controller design method which only uses frequency responses. The proposed method can design controller satisfying stability and desired performance condition on the Nyquist diagram with constraints for prespecified frequency points by convex optimization. The proposed method is compared with the standard H-infinity control design.

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[in Japanese]

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[in Japanese]

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[in Japanese]

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[in Japanese]

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The authors teach control engineering to the students in Mechanical Engineering Course, Osaka University. Although much effort has been devoted, the results are not satisfactory enough. In particular, the essence of feedback control, i.e. the merits and the risks are not understood well. To ensure the under-standing, this paper proposes to use an experimental control system to get personal experience in motivational lectures. The effectiveness of the proposed system and lecture is examined by a questionnaire survey.

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In this paper, we propose a new service system HCP (Home Continuity Plan) for maintaining our daily life safeness by using the concept and idea of the BCP (Business Continuity Plan) which is the important planning for the company to continue their business whatever happens in the disaster such like the 3.11 Tohoku earthquake in Japan. After the earthquake, many troubles of daily life such as traffic jam and shortage of bottled water had been occurred in East Japan,. In order to avoid such risks of daily life, we have led an idea that HCP (Home Continuity Plan) which is a home edition of BCP will be necessary. The HCP service in this paper is designed a model-based system integration technique and described using the OMG SysML. Effectiveness of this proposal will be validated using techniques such as discrete event simulation.

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[in Japanese]

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Solar insolation influences important factors such as the indoor sun-shiny, room temperature, and the amount of power generation of the photovoltaic generation for the house, and so on. To predict such influences, we propose a solar insolation simulator incorporating the simplicity and flexibility of cellular automata.

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[in Japanese]

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[in Japanese]

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Since the 60s of last century, storage cell model was used to simulate the flow of the flood. These models handle the flooding as a range of separate cells, and the water discharge between the cells was calculated using some analytical flow formulation. Recently, flood models based on the cellular automaton (CA) have been studied extensively in assessing and forecasting flood flow. In this paper, a CA flood model which based on an empirical formula for free-surface flow is proposed and a survey has been made comparing the difference between it and some other CA flood models. We compared the effects of changes in cell size and time step to the accuracy of the results between models, also focused on the impact of the infiltration process to flood model.

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Currently, the general engine control method uses the map built from experimental data. But, whenever the parameters of engine change, this method needs to re-design a map and therefore requires long period for development. On the other hand, in order to respond to the demands of the automobile industry promptly, shortening of the development period is necessary. For this problem, model based engine control method is effective. To design a model based engine control, model of the engine is needed. In this paper, we use the reciprocal engine model developed by The SICE Research Committee on Advanced Powertrain Control Theory. Our purpose is to design a model based engine control based on the engine model, aiming at smart development and high quality generation of engine speed. The model of engine is originally developed not for control design but for simulation of engine dynamics in various situation. Therefore, it is extremely complex. Concretely, the engine model has continuous dynamics(intake dynamics), continuous dynamics switched by a discrete event (cylinder dynamics), discrete input (ignition timing and fuel injection),and continuous input(throttle angle). That is, an engine is essentially a hybrid system and control method is needed that take this hybrid property into consideration. There is not the control theory to fit a discrete event in this model now. Simplification is necessary to be able to treat it by a current control theory. Therefore we simplified the model in this study by making the mean-value model that made a discrete event average. Because the conventional mean-value model was the model that considered only a stationary state that didn't handle the combustion process of the cylinder, it cannot aim high quality generation of engine speed. We produced the new mean-value model that considered the dynamics of the cylinder in this study.

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[in Japanese]

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In this paper, we address a dynamic optimal power dispatch problem for power networks based on game theory. We first formulate power networks and an optimal power dispatch problem. Then, the optimal power dispatch problem is reduced to a strategic games. Unlike normal strategic games, this game is affected by not only action but also remaining battery charge. We then prove existence of a kind of equilibrium.

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This paper deals with a distributed control based on gradient methods for load frequency of power networks including distributed generations, batteries, and renewable energies. The control objective is to minimize the cost function of load frequency control problem of power networks and to operate power systems optimally by means of distributed control based on gradient methods with Armijo-type line search. Finally, simulation results of power networks including distributed generations shows the effectiveness of the load frequency control and compare with decentralized control and centralized control.

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We propose a decentralized control of two subsystems with overlapping information for load frequency of power networks introducing distributed power generations. The control objective is to minimize the cost function of load frequency control problem. We expand the state space of the system of power networks and propose a decentralized state feedback control of subsystems including estimation and adjustment of estimation error. Then, we show the effectiveness of the load frequency control by using the proposed decentralized control method through the simulation result of decentralized large scale power network systems.

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Distributed networked sensor systems have a potential applicability for developing a slope disaster monitoring system, but a low energy consumption property is an important issue in this type of application. This paper propose a probabilistic strategy to turn on/off the each sensor that could reduce the consuming energy over the sensor network.

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In the first part, new trends which were found in IFAC World Congress 2011 in Milan will be surveyed in the areas of control system design, modeling and system identification, multiagents/network and control, mechatronics and robot control, and smart grid and energy systems, In the second part, a panel discussion is organized toward concept and vision for the proposal to hosting the IFAC Congress 2020.

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