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A Composite Nonlinear Feedback Based Guidadance Law for Guidance Problem in Presence of Constrained Latteal Accelation
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Valiollah Ghaffari *   , Hasan Mohammadkhan |
| Persian Gulf University , vghaffari@pgu.ac.ir |
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Abstract: (698 Views) |
Usually, constrained lateral acceleration would have undesirable effects on the stability and performance of a guidance system. The composite nonlinear feedback (CNF) can be effectively used to improve the transient response of the closed-loop system in the presence of the constrained input. In this way, guidance law consists of an extra nonlinear term besides the conventional linear one. As a result, such a term adjusts the qualitative characteristics of the transient response. Meanwhile, the nonlinear term is a function of the rate of line-of-sight (LOS) angle which is not activated at origin and infinity. Thus it would be effective only in a specified region. In this paper, proportional navigation is employed for the linear term of the CNF-based guidance law. Therefore, a guidance algorithm is developed for tracking problems using the CNF idea. Applying the proposed guidance method, the closed-loop stability is analytically proved via the well-known Lyapunov stability theory. The suggested approach is simulated in a numerical example. Then the results are compared with an existing technique. As expected, guaranteeing closed-loop stability, in contrast to a similar method, the addressing scheme considerably improves the performance and transient response of the guidance system in the presence of lateral acceleration limitations.
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Article number: 4 |
| Keywords: Guidance law, composite nonlinear feedback, line-of-sight. |
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Full-Text [PDF 10304 kb]
(250 Downloads)
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Type of Study: Research |
Subject:
Nonlinear Control
Received: 2023/04/29 | Accepted: 2023/07/6 | Published: 2023/12/12
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