An online-implementable differential evolution tuned all-aspect guidance law

Raghunathan, T.; Ghose, Debasish

doi:10.1016/j.conengprac.2010.05.013

Cited by 15 publications

(16 citation statements)

References 22 publications

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“…The conflicting requirements discussed above are resolved by defining an objective function which addresses both these concerns. This objective function is made up of the square of control input ( a M ) and the time-weight ( W t ) and is mathematically expressed as (Raghunathan and Ghose, 2010, 2014)…”

Section: Optimal Control Problem Formulationmentioning

confidence: 99%

“…A point-mass two-dimensional missile-target engagement is represented in Figure 1 as in Raghunathan and Ghose (2010). A constantly maneuvering target is considered having a constant speed represented by V T , while the missile speed is also constant and is represented as V M .…”

Section: Optimal Control Problem Formulationmentioning

confidence: 99%

“…It was only with certain assumptions, that the PN law was found to be energy-optimal. Those assumptions include: (1) the missile target model should be a simple one with linearized geometry, (2) the target should be non-maneuvering in nature (Bryson, 1996; Raghunathan and Ghose, 2010; Zarchan, 2012) and (3) the heading error should be small. To relax these assumptions and at the same time to make the guidance law optimal in the sense of interception time as well as energy consumption, a polynomial function was added to the PN law (Kreindler, 1973).…”

Section: Introductionmentioning

confidence: 99%

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Time-energy optimal guidance strategy for realistic interceptor using pseudospectral method

Banerjee

Nabi

Raghunathan

2020

Transactions of the Institute of Measurement and Control

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This paper proposes the use of Legendre pseudospectral method (PSM) to obtain the optimal guidance strategy for a two-dimensional interceptor problem. An optimal control problem is formulated that addresses the conflicting objective of minimizing the energy usage, along with minimizing the time taken by missile to capture the target. The PSM-based guidance strategy is compared with other conventional guidance laws such as pure proportional navigation (PPN) guidance law and also evolutionary algorithm inspired differential evolution tuned proportional navigation (DEPN) guidance law. A scheme by which the PSM guidance strategy can be applied online is also included in this paper. The cost function value and the interception time indicates the superiority of the PSM-based guidance strategy.

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Section: Optimal Control Problem Formulationmentioning

confidence: 99%

Section: Optimal Control Problem Formulationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Time-energy optimal guidance strategy for realistic interceptor using pseudospectral method

Banerjee

Nabi

Raghunathan

2020

Transactions of the Institute of Measurement and Control

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“…Di erent learning algorithms are used to adjust the weight of ANNs. Among them, the delta-bar-delta algorithm, extended delta-bar-delta algorithm, backpropagation algorithm, and directed random search algorithm can be counted [7,[20][21][22].…”

Section: Arti Cial Neural Network (Anns)mentioning

confidence: 99%

Estimation of Mechanical Properties of Welded S355j2+n Steel via the Artificial Neural Network

2016

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A new estimation study on material features for welding processes is reported. The method is based on the Arti cial Neural Network (ANN) for estimation of material features after the gas-metal arc welding process. Since welding is a very common process in many engineering areas, this method would certainly assist technicians and engineers in estimating material features related to the welding parameters before any welding operation. In the proposed method, the input parameters of welding are de ned as various shielding gas mixtures of Ar, O2 and CO2. As the resulting feature, an estimation is made on the mechanical properties, such as tensile strength, impact test, elongation and weld metal hardness, following ANN. The controller is trained with the scaled conjugate gradient method. It is proven that some estimated values are consistent with the experimental data, whereas some others have relatively higher errors. Thus, this method can be used to estimate, especially, the yield strength and elongation values when the shielding gas proportions are ascertained before the welding. Thus, the method helps to ascertain the welding gas selection in a very short time for engineers, and assists in decreasing welding costs.

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“…In [13], the Frenet-Serret formula in classical differential geometry curve theory is used for deriving a 3-D missile-guidance law. The most recent derivation of all-aspect 3-D guidance laws is presented in [14,15]. In [16], an analysis of capturability with augmented pure proportional navigation guidance law from all initial conditions in the plane is performed.…”

Section: Introductionmentioning

confidence: 99%