Adaptive-Gain Second-Order Sliding Mode Control of Attitude Tracking of Flexible Spacecraft

<table>Quaternion tracking errors—controller (<a href="https://static.hindawi.com/articles/mpe/volume-2014/312494/figures/#EEq38">38</a>).</table>

Mathematical Problems in Engineering

Figure 7: Adaptive-Gain Second-Order Sliding Mode Control of Attitude Tracking of Flexible Spacecraft 