In this paper, we extend the sliding mode idea to a class of unmatched uncertain variable structure systems. This method is achieved with introducing a new terminal sliding variable and the finite time stability of proposed method is proved using a new particular finite time condition in both reaching and sliding phases. In reaching phase new sliding mode controller is derived to guarantee the ...

To intercept the maneuvering target through multimissile cooperation, predefined-time cooperative guidance (PTCG) law is presented with constraints including impact time and line-of-sight (LOS) angle. In order to achieve simultaneous interception, we propose a PTCG in LOS direction based on consensus protocol, which guarantees achievement of each missile’s within predefined time. Furthermore, e...

This paper proposes an impact time control guidance law based on exact nonlinear kinematics equations. To address the problem of providing enhanced intercept accuracy, we formulated error variable whose regulation ensures fulfillment required tasks without time-to-go estimation. Based Lyapunov stability theory, a desired line-of-sight rate profile that satisfies convergence was constructed, fro...

This paper presents a nonlinear guidance law for controlling the impact time of missile-target engagement in three dimensions. The is initially formulated two-dimensional encounter before being extended to three-dimensional scenario. constructed such that kinematics are neither linearized nor approximated. offers precise closed-form expression time, which principal contribution this work. Choos...

In this paper, a new fixed-time convergence guidance law is proposed against maneuvering targets in the three-dimensional (3-D) engagement scenario. The stability theory used to zero line-of-sight (LOS) angle rate, which will ensure collision course and impact of target. It proven that LOS rate can be achieved before final time process, regardless initial conditions. Furthermore, merely related...