Aiming at problem that widespread use of low power consumption

low cost

small volume oven controlled crystal oscillator（OCXO） is difficult to maintain high precision timing for a long time without external high precision clock

source correction

noise characteristics of OCXO tame system; aging and temperature characteristics of crystal oscillator are analyzed

adaptive control model for OCXO tame system is established and adopt augmented least-square algorithm

solve the problem that frequency precision of OCXO is decreasing for a long time in the absence of the reference clock. Considering reference clock failure conditions

the model and algorithm are verified by simulation. The simulation results show that compared with the commonly used OCXO tame containing model

this model has the optimal approximation performance.