Yangming Huang

National University of Defense Technology | NUDT · Department of Automatic Control

In strapdown inertial navigation system and global navigation satellite system-based airborne gravimetry, there is a circular problem between the navigation solution and the gravity vector estimation. On one hand, the gravity vector estimation depends on the navigation solution. On the other hand, the navigation solution requires a predetermined gr...

China has developed an airborne gravimetry system based on SINS/DGPS named SGA-WZ, the first system in which a strapdown inertial navigation system (SINS) has been used for airborne gravimetry in China. This gravity measurement system consists of a strap-down inertial navigation system and a differential global positioning system (DGPS). In April 2...

Inertial navigation systems and gravimeters are now routinely used to map the regional gravitational quantities from an aircraft with mGal accuracy and a spatial resolution of a few kilometers. However, airborne gravimeter of this kind is limited by the inaccuracy of the inertial sensor performance, the integrated navigation technique and the kinem...

Accelerometers are one of the most important sensors in a strapdown airborne gravimeter. The accelerometer's drift determines the long-term accuracy of the strapdown inertial navigation system (SINS), which is the primary and most critical component of the strapdown airborne gravimeter. A long-term stability test lasting 104 days was conducted to d...

Accelerometer bias and gyro drift determines the long term accuracy of the strapdown inertial navigation system (SINS) which is the primary and critical component of the strapdown airborne gravimeter (SAG). Making use of the complementary characteristic of DGPS and SINS has been widely and successfully used in many practical applications to prohibi...

As a prerequisite of network differential global positioning system applications, the network ambiguity must be determined. Ambiguity resolution and validation are important aspects of this process. However, validation theory is still under investigation. This paper presents an improved network ambiguity validation method that incorporates addition...

The alignment of the airborne gravity system has a high demand of the precision which has an obvious contrary on the alignment time cost. The possibility and feasibility of the alignment using position matching is discussed in depth. Simulation and field data tests show potential of this method for the usage in the static ground case.

For high accurate applications of integration of the Inertial Navigation System (INS) and the Global Positioning System (GPS) like airborne gravity, time synchronization is of great importance. In this paper, we apply an augmented Kalman filter method with a state representing the timing error between GPS and INS. The detail deduce of the augmented...