Finite-Time Second-Order Sliding Mode Controllers for Spacecraft Attitude Tracking

<table>Quaternion tracking errors —smooth ST controller (<a href="https://static.hindawi.com/articles/mpe/volume-2013/930269/figures/#EEq22">24</a>).</table>

Mathematical Problems in Engineering

fig5

Figure 5

Figure 5: Finite-Time Second-Order Sliding Mode Controllers for Spacecraft Attitude Tracking 