1. A control system, comprising: an actuator for positioning a control device comprising a control surface, wherein the actuator positions the control surface; a control law for directing the actuator as a function of a model output; and a model processor for generating the model output, the model processor comprising: an input object for processing model input and setting a model operating mode; a set state module for setting dynamic states of the model processor, the dynamic states input to an open loop model based on the model operating mode; wherein the open loop model generates current state derivatives, solver state errors, and synthesized parameters as a function of the dynamic states and the model input, wherein a constraint on the current state derivatives is based on a series of cycle synthesis modules interacting in accordance to laws of physics governing the controlled apparatus behavior, each member of the series of cycle synthesis modules modeling a component of a cycle of the control device and comprising a series of utilities, the utilities based on mathematical abstractions of physical laws that govern behavior of the component; an estimate state module for determining an estimated state of the model based on at least one of a prior state of the model, the current state derivatives, the solver state errors, and the synthesized parameters, the estimate state module determining estimator gain associated with the current state derivatives and applying the estimator gain to determine the estimated state of the model, wherein determining estimator gain associated with the current state model and applying the estimator gain is achieved by using a fixed structure with a configurable architecture; and an output object for processing at least the synthesized parameters of the model to determine the model output.