We established the mechanical model of the home-made tri-layer bending polypyrrole conducting polymer actuator based on the equivalent cantilever theory. Through measuring the substrate bending deformation when the low voltage( 0 ~ 1 V) is applied to the actuator and studying the relationships among voltage, bending displacement and power,we established the functional relationship between voltage and uniformly distributed load.The experimental results show that the voltage and the vertical displacement have a linear relationship. When the vol...