Transfer Function of a system

2018 5 20
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更新时间：2018 5 24
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What are the properties of transfer function.
and is the following a valid transfer function:
sys = tf([1],[0.2 0.4 0.3]);

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Walter Roberson
Walter Roberson 2018-5-22

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>> sys = tf([1],[0.2 0.4 0.3]);
>> properties(sys)
Properties for class tf:
Numerator
Denominator
Variable
IODelay
InputDelay
OutputDelay
Ts
TimeUnit
InputName
InputUnit
InputGroup
OutputName
OutputUnit
OutputGroup
Notes
UserData
Name
SamplingGrid
There are also a few hidden properties such as OutputName_ that are used for internal purposes.

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Muhammad Awais
Muhammad Awais 2018-5-23
Thanks sir But is the stated TF is valid or not. ??
Walter Roberson
Walter Roberson 2018-5-23
Yes it is. Some people prefer to normalize so that the leading term of the denominator is 1, which can be done by dividing top and bottom by the leading coefficient (0.2 in this case)
Muhammad Awais
Muhammad Awais 2018-5-24
This is the TF of model tall structure and I want to implement PID and Fuzzy controllers for vibration control. PID has been implemented successfully but the results of fuzzy are not being achieved properly. Sir, If you can Guide me in this regard please. I've used the inclination angle (-15 to 15) and its rate of change (-3 to 3) as the 2 fuzzy inputs and motor angle(-45 to 45) as output.
Walter Roberson
Walter Roberson 2018-5-24
Sorry, I do not have any experience in control systems.

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