TY JOUR TI CURRENT ISSUES IN OPTIMAL CONTROL OF NONLINEAR CONTROL SYSTEMS KW nonlinear control systems KW optimal control KW adaptive control KW robustness KW machine learning KW computa-tional complexity JO Modern Technologies and Scientific and Technological Progress AU Denisiuk, A.V. AU Istomin, A.L. AU Krivov, M.. PY 2026 IS 2026 PB Federal State Funded Educational Establishment of Higher Education «Angarsk State Technical University»