Adjustable compensation ratio feedback system

摘要: Apparatus for implementing Adjustable Compensation Ratio (ACR) active shielding or control of physical fields (magnetic, electric, electromagnetic, acoustic, etc.), comprising the addition a secondary internal feedback loop within conventional primary closed topology. Compensation-ratio transfer function order and coefficients adjustment permits accommodating frequency-dependent frequency- independent effects Protected Volume when system field sensor array is not at exact location where external interference must be optimally canceled. A Laplace polynomial term precisely sets this parameter in supplementary link by modeling characteristic an Interacting Medium without deleterious effect on other desirable closed-loop characteristics. The inventive ACR can used advanced cancellation magnetic purposes.