Shear thickening fluid based object control mechanism

A head unit system for controlling motion of an object, the head unit system comprising:

• a head unit device, wherein the head unit device includes:
• a shear thickening fluid (STF), wherein the STF is configured to have a decreasing viscosity in response to a first range of shear rates and an increasing viscosity in response to a second range of shear rates, wherein the second range of shear rates are greater than the first range of shear rates;
• a chamber, the chamber configured to contain a portion of the STF, wherein the chamber includes a front channel and a back channel;
• a set of gates, the set of gates configured to separate the front channel and the back channel to control velocity of flow of the STF between the front channel and the back channel, wherein the set of gates is further configured to enable the STF to provide the first range of shear rates as the STF flows from the back channel to the front channel when the set of gates of gates is in an open position, wherein the gate is further configured to enable the STF to provide the second range of shear rates as the STF flows from the front channel to the back channel when the set is in a closed position;
• and
• a plunger, the plunger housed at least partially radially within the back channel of the chamber, wherein the plunger is configured to facilitate the set of gates to operate in the closed position to cause the STF within the front channel to provide the second range of shear rates in response to an inward force applied to the plunger from the object as the STF flows from the front channel to the back channel, wherein the plunger is further configured to facilitate the set of gates to operate in the open position to cause the STF within the back channel to provide the first range of shear rates in response to an outward force applied to the plunger as the STF flows from the back channel to the front channel.