Answer / rajkumar

A proportional controller (Kp) will have the effect of
reducing the rise time and will reduce ,but never eliminate,
the steady-state error. An integral control (Ki) will have
the effect of eliminating the steady-state error, but it may
make the transient response worse. A derivative control (Kd)
will have the effect of increasing the stability of the
system, reducing the overshoot, and improving the transient
response.


for full details visit

http://www.engin.umich.edu/group/ctm/PID/PID.html

please send the hpcl (instrumentation) model placement papers to my mail....

9 Answers   HPCL, Invensys, IOCL, ONGC,

---

explain key exchanges in all security modes WPA,WPA2,TLS?

0 Answers  

---

i need some objective type questions in instrumentation

0 Answers  

---

What is open loop checking and close loop checking

1 Answers   BARC, NTPC,

---

why the supply frequency used in America is 60Hz while that used in India is 50Hz?,

2 Answers   Bosch, Genco,

---

---

how to calibrate flow transmitter

1 Answers   Samsung,

---

Explain the key components of control loop?

0 Answers  

---

When doing a liquid seal on a differential flow transmitter , most of the time the sealing liquid will be heavier then the process fluid. For wich application will the sealing liquid be lighter than the process fluid if transmitter is mounted below the process line.

0 Answers   Chevron,

---

what is the difference between Ethernet unmanaged and managed Switch?

2 Answers  

---

what is dry leg and what is wet leg?

3 Answers  

---

What is use of condensate pot

5 Answers   Alstom, Petrocil, Samsung,

---

How can test or measure the probe and extension cable to identify if the problem at the probe or cable or at the driver it self? (pleast notify the measuring method)

0 Answers  

---