Identifying a data-acquisition system by preliminary functional transformation

Current identification is considered for unknown inputs on the basis of out put signal measurements. The acquisition-system operator is estimated by th e introduction of structural redundancy in the spatial domain. A method is considered for identifying a minimally redundant linear static system on th e basis of preliminary transformation. The highest measurement accuracy is provided by preliminary quadratic transformation applied to the input signa l in an additional channel in a minimally redundant acquisition system.