Entity

Time filter

Source Type


Gao X.,Flight automatic control research institute | Gao X.,Aviation Gyro Beijing Photoelectricity Technology Co. | Yan J.,Flight automatic control research institute | Xie L.,Flight automatic control research institute | And 3 more authors.
Guangdian Gongcheng/Opto-Electronic Engineering | Year: 2013

Angular velocity measurement error exists in swaying motion Fiber Optic Gyroscope (FOG), which constrains FOG strap-down system's performance under severe angular motion. Based on automatic control theory and FOG's closed-loop control scheme, the reason for FOG's swaying error was analyzed and found out that the angular acceleration is the main factor for FOG's swaying error. Then a simplified FOG's swaying error model was built up and the compensation algorithm was proposed. Finally, according to the equivalent input principal, it is experimented to test and compensate FOG's swaying error under different swaying frequencies. Test results show that the compensation algorithm has the capability of reducing FOG's swaying error by an order of magnitude. Source


Gao X.,Flight automatic control research institute | Gao X.,Aviation Gyro Beijing Photoelectricity Technology Co. | Yan J.,Flight automatic control research institute | Xie L.,Flight automatic control research institute | And 3 more authors.
Yadian Yu Shengguang/Piezoelectrics and Acoustooptics | Year: 2013

As a dynamic error of fiber optic gyroscope (FOG), angular acceleration error will induce attitude error into FOG strap-down inertial navigation system and constrain the performance of the system under severe angular motion. Based on the dynamic model of closed-loop FOG, angular acceleration error model is setup and its determined factors (including the total gain and period of the control loop of the FOG) are analyzed. Correspondingly, the angular acceleration error decrease method is proposed. In order to exam this model, the angular acceleration error of the closed-loop is tested by applying a slope signal to the feedback step-wave of the FOG, based on the equivalent input principal. And the test result under different angular acceleration and total gain of different control loop is in accord with the model. Source

Discover hidden collaborations