In this paper, an intelligent ladle furnace (ILF) control system is present. The main functions and system structure is intraduced.The system applied combined artificial intelligent technology for ladle furnace heat balance calculation and steel temperature prediction, dynamic energy input optimization and intelligent electrode control. The application results achieved are given to demonstrate the capability of this intelligent control system.

The variable air volume (VAV) air-conditioning system with its superior energy saving effect has been applied in many developed countries, also drawn more and more attention in China. Due to the characteristics of VAV air-conditioning system are nonlinear, large time lag, strong coupling, multi-variable and multi-disturbance, the control complexity of the VAV system increase greatly. The energy conservation and comfort of the VAV air-conditioning system can not fully been embodied in application. The research on the VAV system has become the hot spot in the science and technology workers, many new methods and strategies have emerged. From the three aspects: the air system, the water system and the large scale system, the paper describes the control strategies, the control methods and the research progress about the VAV air-conditioning system.

The 3 DOF parallel machine tool CNC system based on DSP takes 3-HUU configuration of parallel machine tool as the control object, and adopts TMS320F2812 of TI DSP as control core of the CNC system. This paper mainly studies hardware design and software design of the lower control system of the 3 DOF parallel machine tool, and does practical test which shows that the CNC system can well control the parallel machine tool and finish machining movement.