Control concepts for mobile service robots are a key issue in robotic research. With the use of mobile robots in the domestic area, further challenges entails new designs facilitating efficient control concepts for fa...
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Modern complex system design demands modeling on a high level of abstraction together with the system environment components. Such model enables mission level system simulation in the context of its operational condit...
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Modern complex system design demands modeling on a high level of abstraction together with the system environment components. Such model enables mission level system simulation in the context of its operational conditions. A mission level design language providing mission and system level verification is presented in this paper. Also, this language enables designers to describe some of the components at implementation level to test and validate the system implementation at mission level. In this way a uniform design framework is achieved from mission/system down to implementation level
Continuing the papers by Tulbure et al. (2004), are presented some significant results of numerical simulations for railway traction motors, which can be treated as components of electrical locomotives EC-43, by 3.6 M...
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Continuing the papers by Tulbure et al. (2004), are presented some significant results of numerical simulations for railway traction motors, which can be treated as components of electrical locomotives EC-43, by 3.6 MW, with 80t mass. For the starting mode of operation in frequency steps of Deltaf=2.5 Hz, with the slip S c =0.1, are interesting the evolution and interpretation of r.m.s. values of input voltage U 1 [V], stator current I 1 [A], traction force F T [t], developed power P[kW] and speed v[km/h]. It is imposed the maintenance of excitation flux at nominal value Psi=2.73[Wb]
This paper deals with the problem of semiactive vibration control of civil engineering structures subject to unknown external disturbances (for example, earthquakes, winds, etc.). Two kinds of semiactive controllers a...
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Underwater vehicles are highly nonlinear and complex systems, that makes designing autopilots extremely difficult. This paper presents autotuning as a method for tuning parameters of a micro-ROV autopilot. The main be...
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Underwater vehicles are highly nonlinear and complex systems, that makes designing autopilots extremely difficult. This paper presents autotuning as a method for tuning parameters of a micro-ROV autopilot. The main benefit of this procedure is that the model of the process does not have to be known. Autotuning is often used for industrial processes but not on marine vessels. This procedure, which is performed in closed-loop, is completely automated and enables the operator to retune an autopilot whenever ROV performance is degraded (due to different operating points, tether influence, currents, etc.). In this article we use already known different autotuning recommendations (primarily designed for type 0 processes) with some modifications which we recommend for micro-ROVs. We also give results of using different types of PID controllers, whose parameters are being tuned. A real life demonstration on a VideoRay Pro II micro-ROV is provided
The paper deals with the recording and analysis of electric quantities waveforms (voltages and currents) from the components of an electro-energetic group. The quality parameters of energies (and powers) are determine...
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The paper deals with the recording and analysis of electric quantities waveforms (voltages and currents) from the components of an electro-energetic group. The quality parameters of energies (and powers) are determined in distorting and unbalanced regimes. Based on the relations used for the determination of the quality factors of electric quantities and respectively for the determination of the active and reactive powers, an analysis is made. It is concerned with the waveforms from: the main generator stator, the auxiliary generator stator before the fully controlled rectifier with thyristors and from the main generator rotor (after the rectifier). Possible interdependencies between these quantities are determined. The reversed power circulations are explained, along with their possible causes. The performed analysis shows that it is necessary to perform a permanent local surveillance of the energy sources from a power system, watching on the power quality parameters
Aimed at cleaning the curved glass wall of Shanghai science and Technology Museum, a fully pneumatic climbing robot is presented to meet the requirements of cleaning efficiency and simple operation. After an overview ...
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Aimed at cleaning the curved glass wall of Shanghai science and Technology Museum, a fully pneumatic climbing robot is presented to meet the requirements of cleaning efficiency and simple operation. After an overview of the robotic system, this paper emphasizes the software hierarchy realization and path planning evaluation. The hierarchy of the control function is studied in detail, which consists of path planning and task planning. Then a mathematic model is proposed to describe the features of the work target. Considering the movement security, cleaning efficiency and the percentage of cleaning coverage, a new approach to path planning for wall-cleaning robots is presented. In the end, the successful on-site test confirms the principles described above and the robot's ability
The extremum control of the high power induction traction motor is justified by the possibility to operate with minimum electrical power/energy, especially by partial load. The extremum control system is usually overl...
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The extremum control of the high power induction traction motor is justified by the possibility to operate with minimum electrical power/energy, especially by partial load. The extremum control system is usually overlapped to the speed (or torque) control system and is valid if a steady state, partial load of the operation is established. The authors analyze the problem of various modes of operation under reduced disturbances. Also, the analysis deals with the problem of the limits of the stable behavior of the extremum control system
A control scheme for highway tunnels is designed based on a static model of a highway tunnel. The controller is designed to keep the exhaust levels inside the tunnel below given limits. During operation, the model is ...
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A new robust adaptive control design synthesis, which employs both high-order neural networks and math-analytical results, for a class of complex nonlinear mechatronic systems possessing similarity property has been d...
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