Abstract
Abstract According to the characteristics of the guided bomb, a guidance law with angular constraint and robustness is always needed. The paper proposed a guidance law based on non-singular terminal sliding mode (NTSM). In the non-singular Terminal sliding mode control, the tracking error on the sliding surface can converge to zero in a finite time, so a nonlinear term was introduced into the design of the terminal guidance law to substitute the traditional linear sliding mode. In addition, considering the measurement error and the external interference as disturbance with known boundary and making an adaptive estimation to extremes in real time, a non-singular terminal sliding mode guidance law was presented. Controlled by TSMG, the rate of the line-of-sight (LOS) angle between bomb and target can converge quickly, and high guidance precision of bomb in large range airspace of flight condition can be obtained. The simulation results confirm the efficiency and availability of the guidance law.
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