control counter
3.After the mathematics model of the control object of the counter-gravity casting process is analyzed, PID controller is designed, and the PID parameters are determined by MATLAB simulation.
5.The element and operation number setting up and the mode of inputing and outputting of DSW function instruction, SEGL function instruction and ARWS function instruction which are function instruction of Japanese Mitsubishi programmable controller are introduced. Applying combination of these instructions, timer and counter initial value modification and current value show control procedure realize timer and counter initial value modification convenient and current value manifestation accurate and operation vivid.
6.Characteristic:Namely soft also the rich tension, enable it control ball easily, also to have the high speed counter-tension, Canada spreads the surface the strong viscosity, causes it friction force to increase, may with ease to make each kind of revolving.
7.The system realizes the measure and control function of the velocity of main shaft, fuel measure counter, fuel temperature, and advance angle by utilizing microprocessor P89C61X2 and complex programmable logic device (CPLD) XC95108PG84. Software program is written by C language and Verilog HDL, respectively.
10.Counter-measures are reactive compensation,transformer tap emergency control,generation rescheduling,load shedding,and so on.
