The Research Of Digital Control Technology On Aeronautical Static Inverter Based On F2812

Aeronautical Static Inverter(ASI) another name for Aeronautical Inverter PowerSupply, its primary role is transform low voltage aviation DC to single-phase orthree-phase AC intermediate frequency (400Hz) by means of power electronic convertertechnology, to provide electrical power for onboard electrical equipments.ASI works under the condition of complex electromagnetic in atmosphereenvironment, face to some outstanding issues such as slow transient response, stability,poor performance, output waveform is prone to nonlinear distortion. For the reason ofspecial application occasions of onboard electrical equipments, high-precision digital aswell as good stability have become an inevitable trend of of the air power inverter.Forthe advantage of simple structure, good stability and robustness, PID control strategyare widely used in all areas of industrial control. However, conventional PID controllerparameters can not be updated in real time according to the demand of the system, so itis difficult to get the best control effect. Fuzzy self-adaptiving PID control by means ofbasic fuzzy mathematics theory, achieve the parameters of PID on-line self-tuning,shortcomings is it exist static error, can’t take dynamic and static performance of thesystem into account. Repetitive control based on internal model principle which ischaracterized by strong robustness and can inhibition the periodic disturbancethe but thedisadvantage is that it has bad dynamic characteristics and reaction to mutant is "slow".The paper established the mathematical modeling of continuous and discrete modelof the inverter output, comparing the advantages and disadvantages of several typicalcontrol methods, aim at control angle of ASI under dual closed-loop control mode, putforward fuzzy adaptiving PID control and repetitive control combined control strategy.Then utilize MATLAB/Simulink model for modeling and simulating.Currently F2812series DSP chip is a dedicated control chip which are widely usedin industrial field, based on experimental data obtained by the above analysis andsimulation, combined with the working characteristics of the F2812, to design hardwarepart of ASI, and software under the compilation environment of CCS3.3to achievedigital control of ASI.