G. Biancucci, R. Senatore, F. D'Angelo, A. Pizzarulli, M. Verola, E. Quatraro, D. Grifi, M. Perlmutter
{"title":"Unique IRS (Inertial reference System), for safety critical applications, ITAR-FREE and based on high performance Fiber Optic Gyroscope (FOG)","authors":"G. Biancucci, R. Senatore, F. D'Angelo, A. Pizzarulli, M. Verola, E. Quatraro, D. Grifi, M. Perlmutter","doi":"10.1109/iss46986.2019.8943594","DOIUrl":"https://doi.org/10.1109/iss46986.2019.8943594","url":null,"abstract":"ARGO 4000 is the outcome of three years of design and development effort carried out with the objective to realize the world smallest IRS (Inertial Reference System) certified by EASA with pending ETSO-c201, capable to provide high accuracy inertial navigation data in the most challenging environmental conditions applicable to fixed and rotary wing aircrafts and verified by means of the DO-160 standard qualification procedures. Such work has been partially financed by European Union H2020 SME innovation funds.ARGO 4000 architecture integrates a sensor block based on FOG’s (Fiber Optic Gyros) completely design and manufactured in-house using a proprietary technology, and on best-in-class Quartz accelerometers. The sensors are controlled by an extremely compact electronics compliant with DO-254, on which a DO-178C software executes the navigation algorithms to provide better than 1 NM/hr CEP (Circular Error Probable) and 0.05° heading accuracies. External GNSS and Air Data sensors can be interfaced through serial or ARINC-429 buses for aiding purposes. The architecture embeds a provision for extending the interface capabilities to further devices and communication standards (such as MIL-STD-1553) by means of a connecting bridge to an add-on-module, that can be customized with respect the specific platform-dependent integration requirements.ARGO 4000 development went through and extensive phase of simulation and experimental verification of many system aspects, fine tuning them to reach targeted performance and reliability.ARGO 4000 includes a sophisticated motion detection algorithm to improve the accuracy when aircraft is on ground and an IFA (In Flight Alignment) capability to manage emergency power switch off/switch on conditions during flight.ARGO 4000 is a dual-use, ITAR-free product, highly compact (4.1 kg, 3.1 liter) characterized by the best accuracy over weight and size ratio in the worldwide scenario.","PeriodicalId":233184,"journal":{"name":"2019 DGON Inertial Sensors and Systems (ISS)","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116693764","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Attitude determination with the aid of a triple-antenna GNSS receiver without integer ambiguity resolutions integrated with a low-cost inertial measurement unit","authors":"N. Vasilyuk, M. Vorobiev, D. Tokarev","doi":"10.1109/iss46986.2019.8943610","DOIUrl":"https://doi.org/10.1109/iss46986.2019.8943610","url":null,"abstract":"Resolutions of integer ambiguities in GNSS carrier phase measurements may be removed if only fractional parts of single phase differences are used for an attitude determination. But the fractional parts based attitude determination algorithm must be seeded precisely. Low-cost IMU’s measurements are used to satisfy this precise seeding requirement. The special design of the GNSS and IMU coupling filter is proposed. This coupling filter allows to build the tri-antenna GNSS+IMU integrated navigation system using two dual antenna GNSS receivers of any type.","PeriodicalId":233184,"journal":{"name":"2019 DGON Inertial Sensors and Systems (ISS)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116766491","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
M. Warner, J. Grosse, L. Wörner, L. Kumanchik, D. Knoop, J. Schröder, J. Halbey, R. Riesner, C. Braxmaier
{"title":"Hybrid Inertial sensors – future prospects of inertial sensors based on atom interferometry fused with opto-mechanical accelerometers","authors":"M. Warner, J. Grosse, L. Wörner, L. Kumanchik, D. Knoop, J. Schröder, J. Halbey, R. Riesner, C. Braxmaier","doi":"10.1109/iss46986.2019.8943706","DOIUrl":"https://doi.org/10.1109/iss46986.2019.8943706","url":null,"abstract":"Positioning currently relies heavily on Global Navigation Satellite Systems (GNSS). Combined with classical accelerometers and gyroscopes, precise determination of orientation and position at any given time become available. However, but the availability of GNSS (e.g. GPS) is limited and not guaranteed at all times.In this paper we present an alternative based on atom interferometry using cold atom ensembles. An inertial sensor based on cold atoms allows, in theory, for nearly drift-free measurements of inertial forces with accuracies unreached by classical sensors, but the technology is still locked away in large physics laboratories [1].This paper introduces a compact device called SECAMP, which is capable of cooling atoms down to μ-Kelvin. SECAMP has the potential to measure inertial acceleration in three degrees of freedom. In the following, we present the current experimental setup of the apparatus and outline the next steps for the inertial sensor.","PeriodicalId":233184,"journal":{"name":"2019 DGON Inertial Sensors and Systems (ISS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129883519","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"State Transformation Extended Kalman Filter for SINS based Integrated Navigation System","authors":"Maosong Wang, Wenqi Wu, Xiaofeng He, Xianfei Pan","doi":"10.1109/iss46986.2019.8943781","DOIUrl":"https://doi.org/10.1109/iss46986.2019.8943781","url":null,"abstract":"This paper first gives further explanations of the State Transformation Extended Kalman Filter (ST-EKF) from the perspective of common frame velocity error definition. Then develops the loosely-coupled integrated navigation models for Strapdown Inertial Navigation System (SINS)/Global Navigation Positioning System (GNSS) integration, which includes the system error models and measurement models. In the framework of EKF, the propagation of the state and covariance should be executed as fast as possible in order to capture the dynamic change of specific force. For example, the propagation rate is the same as the SINS calculation rate. However, in the framework of ST-EKF, the propagation and measurement updating processes can be implemented simultaneously, which reduces the computation cost greatly. Land vehicle experiment by using a Micro-Electro-Mechanical-Systems (MEMS)-Inertial Measurement Unit (IMU) was conducted to validate the performance of the ST-EKF. Results showed that ST-EKF integrated navigation system had higher positioning when GPS signals were loss from multiple locations. Meanwhile, ST-EKF had higher yaw and velocity maintaining accuracy than EKF when under quasi-static parking situations.","PeriodicalId":233184,"journal":{"name":"2019 DGON Inertial Sensors and Systems (ISS)","volume":"105 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116086352","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Gyrolog – Creating a 3-Dimensional Digital Collection of Classical Gyro Instruments","authors":"Maria Niklaus, Kun Zhan, Jörg F. Wagner","doi":"10.1109/iss46986.2019.8943640","DOIUrl":"https://doi.org/10.1109/iss46986.2019.8943640","url":null,"abstract":"Gyro instruments represent a demanding technology, which became increasingly important during the 20th century. Its significant influence on navigation and guidance of especially maritime and aerospace vehicles make them more and more interesting for historians of technology and museums. Furthermore, they form the essential background for understanding the origin of modern inertial systems.The Chair of Adaptive Structures in Aerospace Engineering of the University of Stuttgart maintains a unique, large collection of all kinds of classic, rotating mass gyro instruments like artificial horizons, directional gyros and rate gyros. The collection was established in the 1960s and was initially used for university teaching and research.To support historical as well as didactical research, it is intended to make these gyro instruments virtually available for experts, but also for a broader community in general. This is done by creating 3-dimensional (3D) digital models of the objects – the purpose of the current Gyrolog project at the University of Stuttgart.The highly complex structures of the gyro instruments represent especially demanding digitisation requirements. Therefore, a combination of methods from photogrammetry, endoscopy and computed tomography (CT) is employed. They aim at creating vectorised 3D models being usable for environments of Virtual Reality and Augmented Reality.It is planned to make the digital collection available via Internet by the library of the University of Stuttgart in 2020. The access of each instrument is enhanced by relevant metadata, regular photographs as well as details about specifications, origin, and usage.","PeriodicalId":233184,"journal":{"name":"2019 DGON Inertial Sensors and Systems (ISS)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128157382","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
B. Tennstedt, C. Schubert, D. Schlippert, S. Schön, E. Rasel
{"title":"Impact of Uncertainties in Atom Interferometry on Strapdown Navigation Solutions","authors":"B. Tennstedt, C. Schubert, D. Schlippert, S. Schön, E. Rasel","doi":"10.1109/iss46986.2019.8943632","DOIUrl":"https://doi.org/10.1109/iss46986.2019.8943632","url":null,"abstract":"This paper examines the impact of systematic and stochastic uncertainties of atom interferometry-based sensors measuring accelerations and turn rates on strapdown navigation solutions. The sensitivities of the sensor to changes in the main readout and scale factor parameters are estimated analytically and compared to simulations with a sophisticated cold atom interferometer (CAI) sensor model. The performance of this model, including uncertainties in the selected parameters, is shown with the help of a Monte Carlo simulation.","PeriodicalId":233184,"journal":{"name":"2019 DGON Inertial Sensors and Systems (ISS)","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134164325","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Eduardo Sánchez Morales, M. Botsch, Bertold Huber, A. G. Higuera
{"title":"High precision indoor positioning by means of LiDAR","authors":"Eduardo Sánchez Morales, M. Botsch, Bertold Huber, A. G. Higuera","doi":"10.1109/iss46986.2019.8943731","DOIUrl":"https://doi.org/10.1109/iss46986.2019.8943731","url":null,"abstract":"The trend towards autonomous driving and the continuous research in the automotive area, like Advanced Driver Assistance Systems (ADAS), requires an accurate localization under all circumstances. An accurate estimation of the vehicle state is a basic requirement for any trajectory-planning algorithm. Still, even when the introduction of the GPS L5 band promises lane-accuracy, coverage limitations in roofed areas still have to be addressed.In this work, a method for high precision indoor positioning using a LiDAR is presented. The method is based on the combination of motion models with LiDAR measurements, and uses infrastructural elements as positioning references. This allows to estimate the orientation, velocity over ground and position of a vehicle in a Local Tangent Plane (LTP) reference frame. When the outputs of the proposed method are compared to those of an Automotive Dynamic Motion Analyzer (ADMA), mean errors of 1°, 0.1 m/s and of 4.7 cm respectively are obtained. The method can be implemented by using a LiDAR sensor as a stand-alone unit. A median runtime of 40.77 μs on an Intel i7-6820HQ CPU signals the possibility of real-time processing.","PeriodicalId":233184,"journal":{"name":"2019 DGON Inertial Sensors and Systems (ISS)","volume":"79 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126240843","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Multi Sensor Pedestrian Navigation System for Indoor and Outdoor Environments","authors":"N. Kronenwett, G. Trommer","doi":"10.1109/iss46986.2019.8943692","DOIUrl":"https://doi.org/10.1109/iss46986.2019.8943692","url":null,"abstract":"This paper presents a real-time multi sensor localization system for pedestrians. The system can be separated into a foot-mounted multi sensor platform for robust and precise localization in indoor and outdoor environments and a hand-held device with the same sensor platform and an additional RGB-D camera for mapping purposes. The foot-mounted module is based on an accurate relative inertial positioning system with high precise Zero-velocity-UPdaTes (ZUPTs) motivated on medical research. GNSS, barometric air pressure and OpenStreetMap information is fused to obtain accurate absolute position and orientation estimations. This system can cope with very challenging situations including multiple outdoor-indoor transitions, elevators and escalators. For the hand-held device a barometric altimeter supported Visual Inertial Simultaneous Localization and Mapping (VISLAM) approach is developed. Separate measurements for translational and rotational movement are generated from RGB-D images. The translation measurements are estimated by a visual inertial odometry approach which enables loop closures. The rotation is calculated by a novel visual inertial compass, which robustly integrates the inertial sensor information. Tests show that both modules generate high accurate trajectories with small errors.","PeriodicalId":233184,"journal":{"name":"2019 DGON Inertial Sensors and Systems (ISS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130180961","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Y. Zhai, Y. Pan, Y. Jia, J. Liu, Z. Tan, K. Yang, H. Luo
{"title":"Surface evolution of cylindrical fused silica resonator and its implication on Q factor","authors":"Y. Zhai, Y. Pan, Y. Jia, J. Liu, Z. Tan, K. Yang, H. Luo","doi":"10.1109/iss46986.2019.8943668","DOIUrl":"https://doi.org/10.1109/iss46986.2019.8943668","url":null,"abstract":"Investigating the surface loss mechanism is crucial for further decreasing energy loss in high quality fused silica resonators. Although there are various assumptions on surface loss mechanisms, experimental verification is not enough. In this paper, we present experimental results on the surface evolution and the Q factor change of the cylindrical fused silica resonator. Results on two cylindrical fused silica resonators show that compared with the buffered oxide etch (BOE), the NH4HF2 solution maintained a better surface quality. A series of experiments were performed on the third resonator and a slice manufactured by the same grinding process, both were etched by NH4HF2 solution simultaneously. The surface evolution of the fused silica slice was characterized by a profiler and a scanned electron microscope, and the decay time constant of the cylindrical fused silica resonator was measured by laser Doppler vibrometer. Results show that, as the etching progresses, the surface quality improved, particularly the micro-cracks were completely removed, and the spatial period of the surface increased. The surface roughness first increased, then fluctuated around a certain value. The decay time of the third resonator first increased rapidly, with a peak value of 138.74s at the etching depth of 50.5μm, then decreased with the increase of etching depth. Interesting facts on surface element distributions were discovered that when the decay time reached the maximum, the content of C reached the minimum and the percentage of Si and O was closest to 1:1. Our results suggested that the decay time constant of the macro-scale cylindrical fused silica resonator is not directly correlated with the surface roughness. More efforts are expected to explain the underlying mechanism behind.","PeriodicalId":233184,"journal":{"name":"2019 DGON Inertial Sensors and Systems (ISS)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121569392","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}