For the process described by the exact transfer function 5 G(s) - ------=------- (lOs + 1)(4s + l)(s + 1)(0.2s + 1) (a) Find an approximate transfer function of second-orderplus-time-delay form that describes this process. (b) Simulate and plot the response y(t) of both the approximate model and the exact model on the same graph for a unit step change in input x(t). (c) What is the maximum error between the two responses? Where does it occur?

1 Chapter 12: Composites Materials Composite materials o Mixture of 2 or more than 2 components o Ex: Concrete, asphalt, wood Why use composites o Improve properties Composites made up of 2 components o (1) Matrix Metals Metal matrix composite (MMC) Ceramics CMC Polymers PMC (2) Reinforcement (Reinforcing agent) Either a particle or a fiber Stress transfer is the BIGGEST ROLE of reinforcing agent The applied stress will be dispersed throughout