Study On The System Identification Control Technique Of Inverter Based On DSP

400Hz inverter is the special power converter for aeronautic system. Currently, the most of inverters in market use the method of analog control, there are many disadvantages, such as complicated controlling circuit, un-flexible, weak ability of anti-jamming, the bad consistency. The digital control is the key to solve these problems.In recent years, the advance of computing speed of digital signal processors affords the hardware and software foundation to the application of digital control. Many attentions have been focused on the digitization of control systems, the researches about the strategy of digital control are on the increase.Towards the characteristic of the variability of system parameter, this thesis puts forward an alterative parameter PID strategy, by building the state-space model and transfer function, and using the on-line system identification and the controller design method based on the analysis of frequency domain. Finally, the simulation model of the inverter and its control is built by Matlab, then, simulating in time domain and frequency domain, and comparing with the general PID technology to prove the validity and reliability of this method.Towards the characteristic of the real-time control, this thesis improves the method of controller design based on the analysis in frequency domain, puts forward a method of controller design with load stabilization factor, and a method of PI controller tuning with a fixed P parameter.Be established in practice in project and the request of power system, the structure and devices of inverter is designed, and the design method and theory are expounded about DSP TMS320F2812.