Evaluation of Closed-loop System Performance

1. Load the experimental results `result.dat'
   
   Type the follows on Matlab:

   >> load result.dat;
   	

2. Plot figures of time response
   
   

   >> perf_time
   	

   This makes four figures of time response of z, y, u and w.
   
   
3. Frequency Analysis by FFT
   
   

   >> perf_fft
   	

   (It takes some minute)
   This makes three figures (labeled as z, w, and z/w) by applying FFT analysis to time response z and w.
   In these figures, `without control' shows frequency spectrum of the time response in the time period from 1 to 5 second, and `with control' from 6 to 10 second.
   The figure labeled z/w shows the ratio of the frequency spectrums z and w.
   
   You can change the frequency range and/or amplitude of the figures by editing the parameters in axis() function in the file `perf_fft.m'.