×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

Effect of Phase Lead Compensator on Phase and Gain margins

Effect of Phase Lead Compensator on Phase and Gain margins

Effect of Phase Lead Compensator on Phase and Gain margins

(OP)
I was just wondering what was the general effect on phase and gain margins when a phase lead compensator was is added to a system.

RE: Effect of Phase Lead Compensator on Phase and Gain margins

In general, stability margins are increased.

xnuke
"Live and act within the limit of your knowledge and keep expanding it to the limit of your life." Ayn Rand, Atlas Shrugged.
Please see FAQ731-376: Eng-Tips.com Forum Policies for tips on how to make the best use of Eng-Tips.

RE: Effect of Phase Lead Compensator on Phase and Gain margins

(OP)
@xnuke

Thank you for your reply. But could you please explain a bit why that happens

RE: Effect of Phase Lead Compensator on Phase and Gain margins

As you probably know, the closer the phase angle is to -180° at the frequency when the gain is at 0 dB (the gain crossover frequency), the smaller the phase margin. Lead compensators, with a low frequency zero and a high frequency pole, have the zero frequency selected below the gain crossover frequency to add positive phase angle at the gain crossover frequency, thereby increasing the phase margin.

xnuke
"Live and act within the limit of your knowledge and keep expanding it to the limit of your life." Ayn Rand, Atlas Shrugged.
Please see FAQ731-376: Eng-Tips.com Forum Policies for tips on how to make the best use of Eng-Tips.

RE: Effect of Phase Lead Compensator on Phase and Gain margins

(OP)
@xnuke

Ohh.. I get it. Thanks a lot. I understand now :)

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources