The first thing you'll notice is the shape is no longer round which unique compared to the patents we've found. This shape is more conducive for the space in the car we are working with. After many trial and errors we learned our lesson that the outer field of the solenoid is no comparison to the inner field. By turning the solenoid in the piston head, we are not as limited length and width. This position will utilize a stronger part of the magnetic field, attracting particles of iron into the fluid ports, clogging them like arteries. We are also able to add a ferromagnetic core to concentrate the field and make it even stronger. This will increase the resistance of the pistons. There will be a spring included in the final design that was not in the prototype that will hold the damper in the extended position and push it back to its original position so it can be reused unlike airbags. Although the prototype was unable to test the way we intended it to, we still learned vital things about solenoids and magnetic fields that lead us to a more successful final design. We believe this project was within our scope of knowledge conceptually, but became limited by our resources to manufacture high fidelity parts and time that would go into a commercial product. Of course there will be maintenance to consider, such as how long the fluid will last before it loses strength  or response. We found in our research that since this is still a relatively new technology, there aren't many studies on ferrofluid longevity. If the fluid in speakers fail, there are any consequences. We believe there isn't a lot of research out there because this is an unconventional use of ferrofluid. The closest we can compare this to is MR fluid shock absorbers in suspension systems which need to be replaced.

As stated we need to have the damper act autonomously and quickly. To do this the first major change is removing the Arduino and replace it with an FPGA. An FPGA is a field programmable gate array. An FPGA is tiny microchip that connects logic gates in any way. These makes it immensely faster than an Arduino because it removes the processor by replacing it with logic hardwiring. Its only beneficial to have these because FPGAs are able to be electronically modified. Meaning even after we designed an FPGA board to implement our code we can change how the board runs it easily making it more efficient.

Second thing to change is to replace our current relay with a field effect transistor. The relay we used to trigger current flow to the solenoid was electromechanical which physically connects two pins together. A FET, the field effect transistor, is an electronic solid-state version of the relay. Another aspect to our design we wanted to add is how to have varying amounts of current that would flow through the solenoid that will vary the strength of the magnetic field which in turn would affect the amount of resistance the damper would produce. This varying current is needed because the current will be dependent to the car speed before the crash. Faster speeds need more resistance because the force from the car crash is greater. Dynamic Device- adjust to every passenger and intensity of crash.

    If everything else is successful, our goal would be to take this design even farther. Our hopes are that is a dynamic device so that is would adjust to every passenger and intensity of crash. We propose to add a sensor that measures the initial force of the passenger against the seatbelt and our device will read and adjust how much current to send the solenoid to slow the passenger at a safer rate than a dead stop.