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PID Control Using MATLAB Simulation

PID Control Using MATLAB Simulation. Lecturer: 黃教琪 Int. phone #:4375 s8323091@cc.ncu.edu.tw. Proportional-Integral-Derivative(PID) Control. For control over steady-state and transient errors we can combine all three control strategies we have discussed is PID control.

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PID Control Using MATLAB Simulation

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  1. PID Control Using MATLAB Simulation Lecturer:黃教琪 Int. phone #:4375 s8323091@cc.ncu.edu.tw Automatic Control - Matlab lecture4

  2. Proportional-Integral-Derivative(PID) Control • For control over steady-state and transient errors we can combine all three control strategies we have discussed is PID control. • PID combination is sometimes able to provide an acceptable degree of error reduction simultaneously with stability and damping. Automatic Control - Matlab lecture4

  3. PID by MATLAB Implement Example 1 • Consider a system with transfer function T=10K/[(1*2)s^2+ (1+2)s+1+AK] Change it manually Automatic Control - Matlab lecture4

  4. PID by MATLAB Implement Example 2 • Consider a system with transfer function T=(K*S+Ki)/[S^3+ 3*S^2+(2+K)*S+Ki] Automatic Control - Matlab lecture4

  5. Automatic Control - Matlab lecture4

  6. Ziegler-Nichols Tuning of PID Regulators • J. G. Ziegler and N. B. Nichols recognized that the step responses of a large number of processes control systems exhibits a process reaction curve like <fig.1> • Ziegler & Nichols gave two methods for tuning the controller • For a decay ratio of 0.25 • Based on a stability boundary Automatic Control - Matlab lecture4

  7. Fig.1 Automatic Control - Matlab lecture4

  8. Z.-N. Tuning of PID Regulators Method One For a decay ratio of 0.25 Automatic Control - Matlab lecture4

  9. Sample of MATLAB Implement • Consider a system with transfer function T=2/[(S+2)*(0.18*S^2+0.6*S+1)] With L=0.38;R=1; 1 Automatic Control - Matlab lecture4

  10. 4 2 3 5 Automatic Control - Matlab lecture4

  11. Automatic Control - Matlab lecture4

  12. Z.-N. Tuning of PID Regulators Method Two Based on a stability boundary Automatic Control - Matlab lecture4

  13. Homework Assignment • Using Z.-N. method Two to establish the PID regulator using the same transfer function above. • Adjusting the P,I,D value manually to establish the most stable output using the same transfer function above. (Deadline: Nov. 10th) Automatic Control - Matlab lecture4

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