For a person with disabilities, being able to write with a pen or pencil can be quite difficult. For some, being able to grasp and hold the writing instrument is a challenge, but there are several items on the market to assist with this problem. However, for a person with essential and related tremors there is no existing system that will permit a sufficient reduction in unwanted motion to permit the pen to be moved in a controlled fashion to permit accurate writing. 

Your task is to create a pen control system so that as the person moves the pen on a writing surface, the tremors are reduced sufficiently to enable the person to accurately carry out this task and even do detailed work such as line drawing. Some success using hand/arm pressure with touch screen stylus and computer mouse to lower tremor activity has been found by previous groups.