화학공학소재연구정보센터

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Response of Process in Time & Frequency Domains

Objectives of This Applet

This applet is designed to illustrate the followings :

  • - Time domain responses for different process to various input type.
  • - Power spectrum of the input and output.
  • - Bode diagram of the process.
  • - Combination of inputs and outputs in Laplace domain
Input Panel
Input Panel

User can choose the type of input. There are various types of input from impulse, step, sinusoidal and etc. User can combine these inputs by providing arithmatic expressions such as '3*U2+0.5*U3'. The Ui's are defined in the listbox. In this way, user can select various types of input. If the 'Periodic' checkbox is checked, the input will be assumed to be periodic with the period of time span in the upper graph. If it is unckecked, the input value after time 20 will be same as last value at time 20. 'Enter" key must be pressed to reflect the changes to the applet.

Input Panel

In these graphs, input shape in time domain and its power spectrum are shown. The y-scale will be adjusted automatically. If the labels for X or y are clicked the axis scale will toggle between normal and logarithmic scales. If there is negitive number in any point, the logarithmic scale will not be shown properly. Currently, the minimum of logrithmic scale is set as 1.0e-6.

Process Panel
Process Panel

This panel shows the finite impulse response (FIR) or finite step response (FSR). By clicking the green part at the lower-right corner, FIR and FSR will be toggled.

Process Panel

These plots show the Bode plot of the process selected in the lower-right panel. The scale will be adjusted automatically.

Output Panel
Output Panel

In these graphs, output shape in time domain and its power spectrum are shown. The y-scale will be adjusted automatically. If the labels for X or y are clicked the axis scale will toggle between normal and logarithmic scales. If there is negitive number in any point, the logarithmic scale will not be shown properly. Currently, the minimum of logrithmic scale is set as 1.0e-6.

Output Panel

User can choose the type of process. There are various types of process from 1st order, 2nd order, nth-order, integrator, low-pass filter and etc. User can combine these processes by providing arithmatic expressions such as '3*G2*G3+G1'. The Gi's are defined in the listbox. In this way, user can select various types of processes. Depending on the process selected, parameters can be adjusted by entering numbers for each parameter fields. 'Enter" key must be pressed to reflect the changes to the applet. When the process is a combination of Gi's, the parameters for single Gi will be used.

Response of Process in Time & Frequency Domains (Java Applet will help you interactively.)

Will be given by the instructor


Applet Developed by and