| With advances in micro-technology, it has become possible to make very small mechanical devices. These devices can be used widely in several places such as ink-jet printers and micro-medicine-pumps implanted under the patient's skin. The basic idea in the design of these pumps is that we have a beam with two layers made of two different materials with two different thermal expansion coefficients. The two layers are strongly joined together. When the layer with larger thermal expansion coefficient is being heated, it wants to expand more than the joint layer. This process makes the beam to bend. If we choose the material and the heating carefully, this bending can be made fast. By placing this device into a fluid tank with a pipe, it is able to pump out the fluid from the tank. The size of these micro pumps is the order of a hundred microns. Our goal is to design a model for a simple microacturator that simulate the work of a real device. |