Simultaneous Determination of System Parameters from Transient Response

A modified least-magnitude method of steepest descent is presented which gives greatly improved convergence to the answer point where the input signal to the process is unit step function. The basis of the modification is a periodic reversal of the sign of the parameter-determining loops, coupled with independent step-wise adjustment of the computed value of each system parameter. Two parameters in a second-order overdamped system are determined simultaneously in less than half the undamped natural period.