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Integrated Estimation Guidance and Control for

Engaging Ballistic Target

P. N. Dwivedi, S.N.Tiwari, Dr. A. Bhattacharya, Scientist, DRDO, Hyderabad-,INDIA

Dr. Radhakant PadhiAsst. Professor, IISC, Banglore, INDIA

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Outline

OBJECTIVE OF IEGC

FORMULATION OF INTEGRATED

ESTIMATION GUIDANCE AND CONTROL

RESULTS

CONCLUSION

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OBJECTIVE OF IEGC

OBJECTIVE OF IEGC

In this paper a novel scheme is designed to integrate Estimation, Guidance and Outer loop of control to enhance performance of an interceptor.

This scheme is here after refereed as Integrated Estimation Guidance Control (IEGC) scheme

It uses the guidance parameters like zero effort miss(ZEM), relative velocity (∆V ), ballistic coefficient (β) and time-to-go

(Tgo) in the estimator state model and utilizes the output vector of estimator as body rate command.

The benefit of this scheme is that Estimation, Guidance and Control work in unison and yields optimal result

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OBJECTIVE OF IEGC

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FORMULATION OF INTEGRATED ESTIMATION GUIDANCE AND CONTROL

State Equation

Measurement Equation

Output Equation

States Equation

States Equation

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Measurement Equation

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OUTPUT EQUATION

Nonlinear Controller

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RESULTS

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Monte Carlo result

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Result with various Engagement

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Result with Perturbed cases

CONCLUSION

In this paper, a new Integrated Estimation, Guidance and Control algorithm is introduced for the interception of ballistic targets.

The design implicitly uses the time-to-go as well as guidance parameter like zero effort miss in the estimation process to reduce the consequences of estimation errors and delay on guidance performance.

Using the new IEGC formulation in various interception scenario demonstrated not only a substantial improvement compared with earlier result, but this scheme also possesses a potential to satisfy a hit-to-kill requirement.

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Thanks for the Attention….!!