Applied Physics and Mathematics Annotation << Back MODELING OF INVARIANT AND QUASI-INVARIANT SYSTEMS BASED ON THE MULTICHANNEL PRINCIPLE V.N. NESTEROV The theoretical foundations of constructing invariant and quasi-invariant systems are discussed. The effectiveness of such systems is maintained even under the conditions of unknown in advance disturbance. The methods presented are based on the two-channel principle and a generalized structural model of such systems. The issues of physical feasibility are considered. Keywords: invariance, quasi-invariance, systems, two-channel, disturbing effect. DOI: 10.25791/pfim.05.2020.1178 Pp. 32-35.