Modeling the effect of sticking contacts in microelectromech.devices

It's a coursework. It should be ready by 21.06.2015 by the evening this ceiling. We need to model the effect of sticking contacts in MEMS (microelectromechanical devices) in MATLAB. You can disassemble some actuator or accelerometer, or any other device (not in the literal sense) and simulate the moment when there is a sticking, something like a keyboard, when the Shift key is stuck.