Selective Forgetting in Adaptive Procedures

Online Adaptive Incremental Reinforcement Learning Flight Control for a CS-25 Class Aircraft

“…In [44][45][46] non-uniformly distributed information is dealt with by selective amplification of the covariance matrix, called directional forgetting. Similarly, [47,48] propose vector-type or selective forgetting, were individual parameter dependent forgetting factors are used, to deal with the effects of time-scale separation. The design of an advanced online parameter identification algorithm for the PH-LAB is out of the scope of this research.…”

Online state of charge and model parameters estimation of the LiFePO4 battery in electric vehicles using multiple adaptive forgetting factors recursive least-squares

“…Secondly, to cope with the different dynamics of parameters variation, a vector-type forgetting factor should be employed [31,32]. This method is known as an efficient approach to simultaneously keep different-dynamic-rate parameters on track [33,34].…”

A new recursive least squares method with multiple forgetting schemes

“…In the case that the parameters in ARX model ( 1) vary with a different rate it is desirable to assign different forgetting factors. The RLS with vector-type forgetting scheme, [18], [15], consists of scaling P t by a diagonal matrix Λ of forgetting factors…”

“…An ad-hoc remedy to estimate parameters with different changing rates is the RLS with vector-type forgetting (or selective forgetting) scheme, [19], [18], [15], [16]. The idea of the above method is to introduce many forgetting factors reflecting the different rates of the change of the parameters.…”