Integration of atom interferometers and inertial measurement units to improve navigation performance

Tennstedt, Benjamin; Schön, Steffen

doi:10.23919/icins43216.2021.9470809

Cited by 7 publications

(5 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, the general accelerometer is above 1 g, and some can even reach hundreds of g. Therefore, when the accuracy of the accelerometer is better than 2π/k eff T 2 , the coarse-fine combination has a good effect. While solving the multi-valued problem, this scheme can improve the dynamic range of the atom gravimeter to be comparable to that of the accelerometer [11,22,[44][45][46][47][48].…”

Section: Coarse-fine Combinationmentioning

confidence: 99%

Research Progress of Dynamic Measurement Technology of Atom Gravimeter

Huang,

Li,

Qin

2023

Applied Sciences

View full text Add to dashboard Cite

After more than 30 years of development, the measurement performance of atom gravimeters in the laboratory has reached a high level. More and more compact, small, portable instruments begin to appear, and field measurements have been conducted gradually. At present, the field measurements of atom gravimeters are mostly static or “stop-and-go” quasi-dynamic experiments, and the research on dynamic measurement is still in its infancy. High-precision absolute gravity dynamic surveying in the field has shown attractive prospects in many aspects, and many researchers have carried out research on it. This paper first reviews the main research work of the atom gravimeter, especially its dynamic measurement technology. Then it introduces the reported principle, scheme, and equipment of atom gravimeter dynamic measurement. The generation mechanism and suppression methods of the main error sources of dynamic measurement, such as vibration noise, accelerometer drift, and carrier dynamic effect, are analyzed. Finally, the application prospects of atom gravimeter dynamic measurement technology in gravity field mapping, navigation, and underwater target detection are discussed.

show abstract

Section: Coarse-fine Combinationmentioning

confidence: 99%

Research Progress of Dynamic Measurement Technology of Atom Gravimeter

Huang,

Li,

Qin

2023

Applied Sciences

View full text Add to dashboard Cite

show abstract

“…The dynamic range of an accelerometer is however 2 g or higher under normal circumstances. Thus, the dynamic range of the atomic gravimeter can be increased to the level of an accelerometer [1,6,[18][19][20][21][22].…”

Section: Principles Of Dynamic Measurementmentioning

confidence: 99%

An atomic gravimeter dynamic measurement method based on Kalman filter

Huang¹,

Liu²,

Qin³

et al. 2022

Meas. Sci. Technol.

View full text Add to dashboard Cite

Atomic gravimeter is an innovative quantum sensor featuring high precision, great sensitivity, and lasting stability. Presently, one research focus is on the combination of the atomic gravimeter with accelerometer to implement dynamic measurements and gather gravity information in a real-time and highly precise manner. The Kalman filter framework was utilized with gravity and accelerometer drift as its states to observe the outputs of the atomic gravimeter and accelerometer, and the data fusion of them is realized. It can restrain the influence of dynamic vibration noise and obtain high precision gravity information in real time. Moreover, the accelerometer drift was estimated and compensated, so as to enhance the lasting stability of the system. Laboratory static, swing platform and lake navigation tests were carried out to verify the effectiveness and feasibility of the proposed method. As revealed in the static test, the proposed method could effectively inhibit the effect of noise, and enhance the precision of gravity measurement. After making compensation for drift, the noise coefficients of the accelerometer, including the bias stability (B), acceleration random walk (K), and rate ramp (R) decreased noticeably. The swing platform test further verified the applicability of the proposed method in dynamic conditions. As proved in the lake test, better results were obtained at a maximum velocity of 8.5km/h. The gravity from the high-precision strap-down gravimeter on the same boat was taken as the reference, and processed to obtain the residual error of 2.03±7.12mGal, so that the proposed method was superior to the offline 300s smooth filter. The proposed method offers a new approach for the study of atomic gravimeter dynamic measurement.

show abstract

“…0:1 Hz and 10 Hz, which have to be combined to create a hybrid accelerometer. In this study, we adapt an extended Kalman filter (EKF) based approach used for inertial navigation (Tennstedt and Schön 2021). This filter system uses the E-ACC data as input to the dynamic model in order to predict the phase shift and the expected observation of the atom interferometer, effectively solving the fringe ambiguity.…”

Section: Extended Kalman Filtermentioning

confidence: 99%

“…In order to predict the phase shift which is based on the position of the atoms in the laser field during the interrogation pulses, cf. Tennstedt and Schön (2021) and Antoine and Borde (2003), the motion equations of the atoms in the body-frame are utilized. The state vector reads…”

Section: Dynamic System and Phase Predictionmentioning

confidence: 99%

See 1 more Smart Citation

Kalman-Filter Based Hybridization of Classic and Cold Atom Interferometry Accelerometers for Future Satellite Gravity Missions

HosseiniArani

Tennstedt

Schilling

et al. 2022

International Association of Geodesy Symposia

View full text Add to dashboard Cite

Proof-of-principle demonstrations have been made for cold atom interferometer (CAI) sensors. Using CAI-based accelerometers in the next generation of satellite gravimetry missions can provide long-term stability and precise measurements of the non-gravitational forces acting on the satellites. This would allow a better understanding of climate change processes and geophysical phenomena which require long-term monitoring of mass variations with sufficient spatial and temporal resolution. The proposed accuracy and long-term stability of CAI-based accelerometers appear promising, while there are some major drawbacks in the long dead times and the comparatively small dynamic range of the sensors. One interesting way to handle these limitations is to use a hybridization with a conventional navigation sensor. This study discusses one possible solution to employ measurements of a CAI accelerometer together with a conventional Inertial Measurement Unit (IMU) using a Kalman filter framework.A hybrid navigation solution of these two sensors for applications on ground has already been demonstrated in simulations. Here, we adapt this method to a space-based GRACE-like gravimetry mission. A simulation is performed, where the sensitivity of the CAI accelerometer is estimated based on state-of-the-art ground sensors and further published space scenarios. Our results show that the Kalman filter framework can be used to combine the measurements of conventional inertial measurement units with the CAI accelerometers measurements in a way to benefit from the high accuracy of the conventional IMU measurements in higher frequencies together with the high stability of CAI measurements in lower frequencies. We will discuss the challenges, potential solutions, and the possible performance limits of the proposed hybrid accelerometry scenario.

show abstract

Integration of atom interferometers and inertial measurement units to improve navigation performance

Cited by 7 publications

References 15 publications

Research Progress of Dynamic Measurement Technology of Atom Gravimeter

Research Progress of Dynamic Measurement Technology of Atom Gravimeter

An atomic gravimeter dynamic measurement method based on Kalman filter

Kalman-Filter Based Hybridization of Classic and Cold Atom Interferometry Accelerometers for Future Satellite Gravity Missions

Contact Info

Product

Resources

About