Adding sensors and actuators to machine elements will make them more active and useful. The idea is elaborated by combination adding these elements to machine elements manufactured of composite materials as well. With this, the properties of composites are supported by the traits of sensing, monitoring as well as actuating. In this study the evidences supporting this idea was presented and generalized to include all machine elements in order to be smart. For more confidence a mathematical model of the most popular engineering elements namely beam is implemented without implanted wires compared with a second one that implanted with two rows of SMA wires, Nitinol. The two models are solved and analyzed with the finite element method; Ansys package software. The results, deflections, stresses, showed how the beam isn't degraded when implanted with wires and still retains its strength. The advantages of this idea are focused mainly on the quality enhancement as well as pre warning failure.

In this paper, four different shapes of robots' hollow arm are suggested so as to investigate the effect of shape on the dynamic behavior of the arm. The finite element method is used to determine the strength of the arms and their equations of motion. The static deflection, stress and moment of inertia are calculated and compared as well as the angular displacement and tip vibration of the four different shapes. A PD controller with fuzzy logic is used for tracing the desired trajectory and reducing the overshoot of the system. All simulations were presented using MATLAB and SIMULINK on the arms under the same desired step trajectory for a time of two seconds. The preferred robot arm is the one that has less vibration in trajectory and after reaching the target. As a result, the tapered arm (shape B) shows better characteristics in which less deflection, stress and tracking.