Find the natural frequency (in Hertz) of the system illustrated in the following figure. Assume the disk is slipping without rolling.  K1=3,503 N/m,  K2=7,496 N/m, M=0.3 kg, and R=0.7 m.

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Design of Observer

According to the control theory, the state observer (state estimator) is known as the term that gives the measures of the internal state of any particular absolute system. The state observer uses the input as well as output of the system for measuring the internal state. It is standard computer-implemented and delivers the basis for numerous practical applications.