Integrated Estimation Guidance and Control for Engaging Ballistic Target P. N. Dwivedi, S.N.Tiwari, Dr. A. Bhattacharya, Scientist, DRDO, Hyderabad-,INDIA Dr. Radhakant Padhi Asst. Professor, IISC, Banglore, INDIA

Outline OBJECTIVE OF IEGC FORMULATION OF INTEGRATED ESTIMATION GUIDANCE AND CONTROL RESULTS CONCLUSION

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

OBJECTIVE OF IEGC

FORMULATION OF INTEGRATED ESTIMATION GUIDANCE AND CONTROL State Equation Measurement Equation Output Equation

States Equation

States Equation

Measurement Equation

OUTPUT EQUATION

Nonlinear Controller

RESULTS

Monte Carlo result

Result with various Engagement

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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