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In a practical terminal guidance process, missile acceleration may be saturated and the saturation can lead to degraded interception performance. This paper presents an anti-saturation guidance law with finite-time convergence for a three-dimensional maneuvering interception, using the theories of finite-time boundedness (FTB) and input-output finite-time stability (IO-FTS). With this law, the line-of-sight...
In this paper, a new nonlinear observer (thetas - D observer) is proposed to estimate the feedback states for optimal control of a highly maneuverable aircraft. This observer is derived by constructing the dual of a recently developed nonlinear optimal control technique-known as the thetas - D technique. The thetas - D optimal control approach provides an approximate closed-form solution to the Hamilton-Jacobi-Bellman...
A new computational tool is presented in this paper for suboptimal control design of a class of nonlinear distributed parameter systems. First proper orthogonal decomposition based problem-oriented basis functions are designed, which are then used in a Galerkin projection to come up with a low-order lumped parameter approximation. Next, a suboptimal controller is designed using the emerging /spl thetas/-D...
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