Instruments and Systems: Monitoring, Control, and Diagnostics Annotation << Back Measuring transducers immunity improvement methods S.N. MEDVEDEVA, V.I. CHERNETZOV, M.V. CHERNETZOV The work demonstrates that the impact of harmonic interferences in nonlinear function measuring transducer produce polyharmonic errors. In their spectrum there is always a component that is given with the same formula as the valid signal. That’s why this component is inobservable and therefore it formes added interference which cannot be removed by well-known linear filtration methods. Interferences rejection processes are given on the base of nonlinear filtration methods and invariance characteristics of Fourier transformation. In order to determine the formula coefficient value that give added interference, we recommend the inertialess Hammerstein-Chebyshev Model. The efficiency of developed interferences rejection methods is supported by analytical investigations in terms of measuring transducers with polunominal and exponential transmitting functions. Keywords: measuring transducer, transducing function, immunity, parametric transducer, Hammerstein model, Hammerstein-Chebyshev model. Contacts: E-mail: sn-medvedeva@yandex.ru Pp. 53-57.