The shock control bump (SCB) is a passive method of reducing shock drag. Aiming at the deflection-changing bump mentioned in recent years

a shape memory alloy (SMA) bump with two-way memory effect was proposed

which can change deflection by controlling temperature

optimizing the drag reduction performance of SCB. In order to achieve the goal of precise control of deflection

a temperature–deflection hysteresis model based on Preisach theory was proposed. PID control based on the model was conducted

the experimental results show that the model can be applied to the deflection control of SMA bumps

the maximum relative error of the four target points in the experiment is 5.17%

which is better than the PID control without this model.