作者COBRAS518 (Never Stop)
看板Electronics
标题[问题] 两题控制
时间Mon Jan 10 10:54:04 2011
1. Let P(s) = (s-4)/[(s+5)(s-5)]
(a) Find x,y,n,d∈S such that P = n/d, d is a Blaschke product, and
xd + yn = 1.
(b) Find a controller C(s) with a pole at s = 10, which stabilizes P in the
standard feedback system.
(c) W(s) = (1+0.1s)/(1+s)
Find a lower bound L on the achievable ||W H (s)|| (using a
yd ∞
stabilizing controller)
(d) Suppose for robustness considerations, it has been determined that the
stabilizing controller C(s) should satisfy
||C/(1+PC)|| ≦50
∞
Is there such a controller?
2. Suppose a controller is found which stabilizes the plant
P(s) = (s-1)/(s^2+s+5) and in addition achieves at least 30dB of disturbance
rejection for |ω|≦2(rad/s). Find a lower bound on ||H (s)|| . If we
yd ∞
require ||H (s)|| ≦12dB, what is the maximum bandwidth over which we can
yd ∞
achieves at least 30dB of disturbance rejection?
--
※ 发信站: 批踢踢实业坊(ptt.cc)
◆ From: 140.113.80.253
※ 编辑: COBRAS518 来自: 140.113.80.253 (01/10 10:54)
1F：推 jamtu:作业要自己写喔～～～ 01/10 13:42
2F：→ COBRAS518:版上如果有帮我做出来的给1000 p币 01/10 14:37
3F：推 obov:有一千美金我考虑看看 01/10 15:00
4F：→ a6523139:p币不能买食物吃 01/10 21:37
5F：→ itsforte:.....学弟不要出来丢脸 01/11 11:46
6F：→ pituohallo:太扯了 这题连中兴电机的学生都不放在眼里 12/30 18:35