what is PID short for in this sentence?

[arishoda]

The dynamic behavior of a non-linear 8 degrees of freedom vehicle model having active suspensions and a PID controlled passenger seat is examined.
thanks in advance~

 

[BobM3]

Closed loop, Proportional, Integral, Derivative control I'd guess.

 

[arishoda]

Thank you for your answer!
The PID control does represent Proportional, Integral, Derivative control !