This study concerns the active vibration control of journal bearings, which are also known as sliding bearings. The control system contains a non-rotating loose bushing, the position of which is controlled by piezoelectric actuators. For governing the respective orthogonal direction of the journal motion, the control algorithm realizes a proportional controller in parallel with a bandpass filter of the IIR type. The bandpass filter is of the second order and its centre frequency is self-tuned to be the same as the whirl frequency that results from the instability of the bearing journal due to the oil film. The objective of active vibration control is to achieve the highest operational speed of the journal bearing at which the motion of the rotor is stable. The control algorithm for the active vibration control is implemented in Simulink and realized in a dSPACE control system.

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The article deals with usage of PLC (Programmable Logic Controller) and PIC (Peripheral Interface Controller) for realization of intelligent family house model. The aim was to design intelligent family house model with help of microelectronic components and compare advantages and disadvantages of PLC Simatic 314C-2DP and PIC 16F873A in this branch. In this thesis were made for example modules serving for temperature control, DC motor control, lights control or modules for security system. Data transfer between PIC and PC is realized by serial communication and between PLC and PC is OPC (OLE for Process Control) communication. Everything is controlled and monitored from SCADA/HMI system called Control Web 6. Application is accessible via Internet browser in local network. The view of application is adapted to viewing through mobile phone.

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