Hi,
I have one doubt abt openloop systems.

Suppose there is a openloop stable transfer funcion 1/(s*(s+1)). If i give step input to this, the response will be unbounded. How can i say
the openloop system is unstable.

adding to this, If i give finite amount of voltage to a DC motor, the position or shaft angle goes to infinity as time increases. can we say the DC motor underloop is unstable for finite amount of input. (The DC motor has an integral term..like the tf mentioned above)

Any comments on this.

Best regards srinivas

Suppose there is a openloop stable transfer funcion 1/(s*(s+1)). If i give step input to this, the response will be unbounded. How can i say

adding to this, If i give finite amount of voltage to a DC motor, the position or shaft angle goes to infinity as time increases. can we say the DC motor underloop is unstable for finite amount of input. (The DC motor has an integral term..like the tf mentioned above)

Any comments on this.

Best regards srinivas