Recursive approximate solution to time-varying matrix differential Riccati equation: linear and nonlinear systems

Saeed Rafee Nekoo and Mohsen Irani Rahaghi

International Journal of Systems Science, 2018, vol. 49, issue 13, 2797-2807

Abstract: An approximate solution is proposed for linear-time-varying (LTV) systems based on Taylor series expansion in a recursive manner. The intention is to present a fast numerical solution with reduced sampling time in computation. The proposed procedure is implemented on finite-horizon linear and nonlinear optimal control problem. Backward integration (BI) is a well known method to give a solution to finite-horizon optimal control problem. The BI performs a two-round solution: first one elicits an optimal gain and the second one completes the answer. It is very important to finish the backward solution promptly lest in practical work, system should not wait for any action. The proposed recursive solution was applied for mathematical examples as well as a manipulator as a representative of complex nonlinear systems, since path planning is a critical subject solved by optimal control in robotics.

Date: 2018
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DOI: 10.1080/00207721.2018.1525623

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