7 research outputs found
ΠΠ΅ΡΠΎΠ΄ ΠΏΠΎΠ΄Π°Π²Π»Π΅Π½ΠΈΡ ΡΠ»ΡΡΠ°ΠΉΠ½ΡΡ ΡΡΠΌΠΎΠ² ΠΈΠ½Π΅ΡΡΠΈΠ°Π»ΡΠ½ΡΡ Π΄Π°ΡΡΠΈΠΊΠΎΠ² Π½Π° ΠΎΡΠ½ΠΎΠ²Π΅ ΠΊΠΎΠΌΠΏΠ»Π΅ΠΊΡΠΈΡΠΎΠ²Π°Π½ΠΈΡ AR-ΠΌΠΎΠ΄Π΅Π»ΠΈ ΠΈ Π°Π΄Π°ΠΏΡΠΈΠ²Π½ΠΎΠ³ΠΎ ΡΠΈΠ»ΡΡΡΠ° ΠΠ°Π»ΠΌΠ°Π½Π° ΡΠΈΠΏΠ° SRUKF ΠΏΡΠΈ Π½Π°ΡΠ°Π»ΡΠ½ΠΎΠΉ Π²ΡΡΡΠ°Π²ΠΊΠ΅ ΠΠΠΠ‘ Π½Π° Π½Π΅ΠΏΠΎΠ΄Π²ΠΈΠΆΠ½ΠΎΠΌ ΠΎΡΠ½ΠΎΠ²Π°Π½ΠΈΠΈ
Introduction. In the gyrocompassing mode, the initial heading angle of a platformless inertial navigation system (PINS) is determined based on the data obtained from accelerometers and gyroscopes that measure the projections of the gravitational acceleration vector and the Earthβs angular velocity vector on the axes of the body coordinates system in the PINS initial stationary mode. Due to unavoidable circumstances, such as bias instability and random noise in the accelerometer and gyroscope signals, much time is required to obtain the sufficient amount of sensor data for achieving the necessary accuracy of useful measurement values by the averaging method. In this context, in order to reduce the time of the gyrocompassing mode, data processing methods should be used to eliminate the bias instability and random noise in the signals received from PINS inertial sensors.Aim. To develop a method for suppressing random noise and reducing bias instability in the signals of inertial sensors, thereby reducing the time of the gyrocompassing mode of PINS and providing for the required accuracy of its initial heading angle determination.Materials and methods. An autoregressive (AR) model was used to simulate random noise in the measured sensor signals followed by its filtering using a Sage-window square-root unscented Kalman filter (SW-SRUKF).Results. A mathematical model describing random noise in the PINS inertial sensors in the stationary mode was derived. A methodology for suppressing random noise was proposed. The effectiveness of the proposed method was tested on actual data, with the results presented in the form of figures and tables.Conclusion. A method for eliminating the bias instability and random noise of PINS accelerometers and gyroscopes was proposed based on AR model and SW-SRUKF. The accuracy and effectiveness of the proposed method was confirmed by processing actual inertial sensor data. The results obtained are significant for reducing the initial alignment time of a PINS in the gyrocompassing mode.ΠΠ²Π΅Π΄Π΅Π½ΠΈΠ΅. Π ΡΠ΅ΠΆΠΈΠΌΠ΅ Π³ΠΈΡΠΎΠΊΠΎΠΌΠΏΠ°ΡΠΈΡΠΎΠ²Π°Π½ΠΈΡ Π½Π°ΡΠ°Π»ΡΠ½ΡΠΉ ΡΠ³ΠΎΠ» ΠΊΡΡΡΠ° Π±Π΅ΡΠΏΠ»Π°ΡΡΠΎΡΠΌΠ΅Π½Π½ΠΎΠΉ ΠΈΠ½Π΅ΡΡΠΈΠ°Π»ΡΠ½ΠΎΠΉ Π½Π°Π²ΠΈΠ³Π°ΡΠΈΠΎΠ½Π½ΠΎΠΉ ΡΠΈΡΡΠ΅ΠΌΡ (ΠΠΠΠ‘) ΠΎΠΏΡΠ΅Π΄Π΅Π»ΡΠ΅ΡΡΡ Π½Π° ΠΎΡΠ½ΠΎΠ²Π΅ Π΄Π°Π½Π½ΡΡ
Π°ΠΊΡΠ΅Π»Π΅ΡΠΎΠΌΠ΅ΡΡΠΎΠ² ΠΈ Π³ΠΈΡΠΎΡΠΊΠΎΠΏΠΎΠ², ΠΈΠ·ΠΌΠ΅ΡΡΡΡΠΈΡ
ΠΏΡΠΎΠ΅ΠΊΡΠΈΠΈ Π²Π΅ΠΊΡΠΎΡΠ° Π³ΡΠ°Π²ΠΈΡΠ°ΡΠΈΠΎΠ½Π½ΠΎΠ³ΠΎ ΡΡΠΊΠΎΡΠ΅Π½ΠΈΡ ΠΈ Π²Π΅ΠΊΡΠΎΡΠ° ΡΠ³Π»ΠΎΠ²ΠΎΠΉ ΡΠΊΠΎΡΠΎΡΡΠΈ Π²ΡΠ°ΡΠ΅Π½ΠΈΡ ΠΠ΅ΠΌΠ»ΠΈ Π½Π° ΠΎΡΠΈ ΡΠ²ΡΠ·Π°Π½Π½ΠΎΠΉ ΡΠΈΡΡΠ΅ΠΌΡ ΠΊΠΎΠΎΡΠ΄ΠΈΠ½Π°Ρ Π² Π½Π°ΡΠ°Π»ΡΠ½ΠΎΠΌ Π½Π΅ΠΏΠΎΠ΄Π²ΠΈΠΆΠ½ΠΎΠΌ ΡΠ΅ΠΆΠΈΠΌΠ΅ ΡΠ°Π±ΠΎΡΡ ΠΠΠΠ‘. ΠΠ·-Π·Π° Π½Π΅ΠΈΠ·Π±Π΅ΠΆΠ½ΠΎΠ³ΠΎ Π½Π°Π»ΠΈΡΠΈΡ Π½Π΅ΡΡΠ°Π±ΠΈΠ»ΡΠ½ΠΎΡΡΠΈ ΡΠΌΠ΅ΡΠ΅Π½ΠΈΡ Π½ΡΠ»Ρ ΠΈ ΡΠ»ΡΡΠ°ΠΉΠ½ΡΡ
ΡΡΠΌΠΎΠ² Π² ΡΠΈΠ³Π½Π°Π»Π°Ρ
Π°ΠΊΡΠ΅Π»Π΅ΡΠΎΠΌΠ΅ΡΡΠΎΠ² ΠΈ Π³ΠΈΡΠΎΡΠΊΠΎΠΏΠΎΠ² ΡΡΠ΅Π±ΡΠ΅ΡΡΡ Π΄Π»ΠΈΡΠ΅Π»ΡΠ½ΠΎΠ΅ Π²ΡΠ΅ΠΌΡ Π΄Π»Ρ ΠΏΠΎΠ»ΡΡΠ΅Π½ΠΈΡ Π΄ΠΎΡΡΠ°ΡΠΎΡΠ½ΠΎΠ³ΠΎ ΠΎΠ±ΡΠ΅ΠΌΠ° Π΄Π°Π½Π½ΡΡ
Π΄Π°ΡΡΠΈΠΊΠΎΠ², ΡΡΠΎΠ±Ρ Π΄ΠΎΡΡΠΈΡΡ ΡΡΠ΅Π±ΡΠ΅ΠΌΠΎΠΉ ΡΠΎΡΠ½ΠΎΡΡΠΈ ΠΎΠΏΡΠ΅Π΄Π΅Π»Π΅Π½ΠΈΡ ΠΏΠΎΠ»Π΅Π·Π½ΡΡ
ΠΈΠ·ΠΌΠ΅ΡΡΠ΅ΠΌΡΡ
Π·Π½Π°ΡΠ΅Π½ΠΈΠΉ ΠΌΠ΅ΡΠΎΠ΄ΠΎΠΌ ΡΡΡΠ΅Π΄Π½Π΅Π½ΠΈΡ. ΠΠΎΡΡΠΎΠΌΡ, ΡΡΠΎΠ±Ρ ΡΠΎΠΊΡΠ°ΡΠΈΡΡ Π²ΡΠ΅ΠΌΡ ΡΠ΅ΠΆΠΈΠΌΠ° Π³ΠΈΡΠΎΠΊΠΎΠΌΠΏΠ°ΡΠΈΡΠΎΠ²Π°Π½ΠΈΡ, Π½Π΅ΠΎΠ±Ρ
ΠΎΠ΄ΠΈΠΌΠΎ ΠΈΡΠΏΠΎΠ»ΡΠ·ΠΎΠ²Π°ΡΡ ΠΌΠ΅ΡΠΎΠ΄Ρ ΠΎΠ±ΡΠ°Π±ΠΎΡΠΊΠΈ Π΄Π°Π½Π½ΡΡ
Π΄Π»Ρ ΡΠ½ΠΈΠΆΠ΅Π½ΠΈΡ Π½Π΅ΡΡΠ°Π±ΠΈΠ»ΡΠ½ΠΎΡΡΠΈ ΡΠΌΠ΅ΡΠ΅Π½ΠΈΡ Π½ΡΠ»Ρ ΠΈ ΡΠ»ΡΡΠ°ΠΉΠ½ΡΡ
ΡΡΠΌΠΎΠ² Π² ΠΏΠΎΠ»ΡΡΠ΅Π½Π½ΡΡ
ΠΎΡ ΠΈΠ½Π΅ΡΡΠΈΠ°Π»ΡΠ½ΡΡ
Π΄Π°ΡΡΠΈΠΊΠΎΠ² ΠΠΠΠ‘ ΡΠΈΠ³Π½Π°Π»Π°Ρ
.Π¦Π΅Π»Ρ ΡΠ°Π±ΠΎΡΡ. Π Π°Π·ΡΠ°Π±ΠΎΡΠΊΠ° ΠΌΠ΅ΡΠΎΠ΄Π° ΠΏΠΎΠ΄Π°Π²Π»Π΅Π½ΠΈΡ ΡΠ»ΡΡΠ°ΠΉΠ½ΡΡ
ΡΡΠΌΠΎΠ² ΠΈ ΡΠΌΠ΅Π½ΡΡΠ΅Π½ΠΈΡ Π½Π΅ΡΡΠ°Π±ΠΈΠ»ΡΠ½ΠΎΡΡΠΈ ΡΠΌΠ΅ΡΠ΅Π½ΠΈΡ Π½ΡΠ»Ρ Π² ΡΠΈΠ³Π½Π°Π»Π°Ρ
ΠΈΠ½Π΅ΡΡΠΈΠ°Π»ΡΠ½ΡΡ
Π΄Π°ΡΡΠΈΠΊΠΎΠ², Π±Π»Π°Π³ΠΎΠ΄Π°ΡΡ ΡΠ΅ΠΌΡ ΡΠΎΠΊΡΠ°ΡΠ°Π΅ΡΡΡ Π²ΡΠ΅ΠΌΡ ΡΠ΅ΠΆΠΈΠΌΠ° Π³ΠΈΡΠΎΠΊΠΎΠΌΠΏΠ°ΡΠΈΡΠΎΠ²Π°Π½ΠΈΡ ΠΠΠΠ‘ ΠΏΡΠΈ ΠΎΠ±Π΅ΡΠΏΠ΅ΡΠ΅Π½ΠΈΠΈ ΡΡΠ΅Π±ΡΠ΅ΠΌΠΎΠΉ ΡΠΎΡΠ½ΠΎΡΡΠΈ ΠΎΠΏΡΠ΅Π΄Π΅Π»Π΅Π½ΠΈΡ Π΅Π΅ Π½Π°ΡΠ°Π»ΡΠ½ΠΎΠ³ΠΎ ΡΠ³Π»Π° ΠΊΡΡΡΠ°.ΠΠ°ΡΠ΅ΡΠΈΠ°Π»Ρ ΠΈ ΠΌΠ΅ΡΠΎΠ΄Ρ. ΠΡΠΏΠΎΠ»ΡΠ·ΡΠ΅ΡΡΡ ΠΌΠΎΠ΄Π΅Π»Ρ Π°Π²ΡΠΎΡΠ΅Π³ΡΠ΅ΡΡΠΈΠΈ (Π°Π½Π³Π». autoregressive β AR) Π΄Π»Ρ ΠΏΠΎΡΡΡΠΎΠ΅Π½ΠΈΡ ΠΌΠ°ΡΠ΅ΠΌΠ°ΡΠΈΡΠ΅ΡΠΊΠΎΠΉ ΠΌΠΎΠ΄Π΅Π»ΠΈ ΡΠ»ΡΡΠ°ΠΉΠ½ΡΡ
ΡΡΠΌΠΎΠ² Π² ΡΠΈΠ³Π½Π°Π»Π°Ρ
Π΄Π°ΡΡΠΈΠΊΠΎΠ², Π·Π°ΡΠ΅ΠΌ ΡΡΠΈ ΡΡΠΌΡ ΡΠΈΠ»ΡΡΡΡΡΡΡΡ ΠΏΡΡΠ΅ΠΌ ΠΈΡΠΏΠΎΠ»ΡΠ·ΠΎΠ²Π°Π½ΠΈΡ ΡΠΈΠ»ΡΡΡΠ° ΠΠ°Π»ΠΌΠ°Π½Π° ΡΠΈΠΏΠ° SKURF (Π°Π½Π³Π». Square-Root Unscented Kalman Filter) Ρ ΠΏΡΠΈΠΌΠ΅Π½Π΅Π½ΠΈΠ΅ΠΌ Sage-ΠΎΠΊΠ½Π° (Π°Π½Π³Π». Sage window Square-Root Unscented Kalman Filter β SW-SRUKF).Π Π΅Π·ΡΠ»ΡΡΠ°ΡΡ. ΠΠ°ΡΠ΅ΠΌΠ°ΡΠΈΡΠ΅ΡΠΊΠ°Ρ ΠΌΠΎΠ΄Π΅Π»Ρ ΡΠ»ΡΡΠ°ΠΉΠ½ΡΡ
ΡΡΠΌΠΎΠ² ΠΈΠ½Π΅ΡΡΠΈΠ°Π»ΡΠ½ΡΡ
Π΄Π°ΡΡΠΈΠΊΠΎΠ² Π² Π½Π΅ΠΏΠΎΠ΄Π²ΠΈΠΆΠ½ΠΎΠΌ ΡΠ΅ΠΆΠΈΠΌΠ΅. ΠΠ»Π³ΠΎΡΠΈΡΠΌ ΠΏΠΎΠ΄Π°Π²Π»Π΅Π½ΠΈΡ ΡΠ»ΡΡΠ°ΠΉΠ½ΡΡ
ΡΡΠΌΠΎΠ². Π Π΅Π·ΡΠ»ΡΡΠ°ΡΡ ΠΎΠ±ΡΠ°Π±ΠΎΡΠΊΠΈ ΡΠ΅Π°Π»ΡΠ½ΡΡ
Π΄Π°Π½Π½ΡΡ
Π² Π²ΠΈΠ΄Π΅ ΡΠΈΡΡΠ½ΠΊΠΎΠ² ΠΈ ΡΠ°Π±Π»ΠΈΡ Π΄Π»Ρ Π°ΠΏΡΠΎΠ±Π°ΡΠΈΠΈ ΡΡΡΠ΅ΠΊΡΠΈΠ²Π½ΠΎΡΡΠΈ ΠΏΡΠ΅Π΄Π»ΠΎΠΆΠ΅Π½Π½ΠΎΠ³ΠΎ ΠΌΠ΅ΡΠΎΠ΄Π°.ΠΠ°ΠΊΠ»ΡΡΠ΅Π½ΠΈΠ΅. ΠΡΠ΅Π΄Π»Π°Π³Π°Π΅ΡΡΡ ΠΌΠ΅ΡΠΎΠ΄ ΡΡΠΌΠΎΠΏΠΎΠ΄Π°Π²Π»Π΅Π½ΠΈΡ Π΄Π»Ρ ΡΠ½ΠΈΠΆΠ΅Π½ΠΈΡ Π½Π΅ΡΡΠ°Π±ΠΈΠ»ΡΠ½ΠΎΡΡΠΈ ΡΠΌΠ΅ΡΠ΅Π½ΠΈΡ Π½ΡΠ»Ρ ΠΈ ΡΠ»ΡΡΠ°ΠΉΠ½ΡΡ
ΡΡΠΌΠΎΠ² Π°ΠΊΡΠ΅Π»Π΅ΡΠΎΠΌΠ΅ΡΡΠΎΠ² ΠΈ Π³ΠΈΡΠΎΡΠΊΠΎΠΏΠΎΠ² ΠΠΠΠ‘ ΠΏΡΡΠ΅ΠΌ ΠΊΠΎΠΌΠΏΠ»Π΅ΠΊΡΠΈΡΠΎΠ²Π°Π½ΠΈΡ AR-ΠΌΠΎΠ΄Π΅Π»ΠΈ ΠΈ SW-SRUKF. ΠΠΎΡΡΠ΅ΠΊΡΠ½ΠΎΡΡΡ ΠΈ ΡΡΡΠ΅ΠΊΡΠΈΠ²Π½ΠΎΡΡΡ ΠΏΡΠ΅Π΄Π»ΠΎΠΆΠ΅Π½Π½ΠΎΠ³ΠΎ ΠΌΠ΅ΡΠΎΠ΄Π° ΠΏΠΎΠ΄ΡΠ²Π΅ΡΠΆΠ΄Π΅Π½Π° ΡΠ΅Π·ΡΠ»ΡΡΠ°ΡΠ°ΠΌΠΈ ΠΎΠ±ΡΠ°Π±ΠΎΡΠΊΠΈ ΡΠ΅Π°Π»ΡΠ½ΡΡ
Π΄Π°Π½Π½ΡΡ
Ρ ΠΈΠ½Π΅ΡΡΠΈΠ°Π»ΡΠ½ΡΡ
Π΄Π°ΡΡΠΈΠΊΠΎΠ². ΠΠΎΠ»ΡΡΠ΅Π½Π½ΡΠ΅ ΡΠ΅Π·ΡΠ»ΡΡΠ°ΡΡ Π·Π½Π°ΡΠΈΠΌΡ Π΄Π»Ρ ΡΠΎΠΊΡΠ°ΡΠ΅Π½ΠΈΡ Π²ΡΠ΅ΠΌΠ΅Π½ΠΈ Π½Π°ΡΠ°Π»ΡΠ½ΠΎΠΉ Π²ΡΡΡΠ°Π²ΠΊΠΈ ΠΠΠΠ‘ Π² ΡΠ΅ΠΆΠΈΠΌΠ΅ Π³ΠΈΡΠΎΠΊΠΎΠΌΠΏΠ°ΡΠΈΡΠΎΠ²Π°Π½ΠΈΡ
A novel adaptive state of charge estimation method of full life cycling lithium-ion batteries based on the multiple parameter optimization.
The state of charge (SoC) estimation is the safety management basis of the packing lithium-ion batteries (LIB), and there is no effective solution yet. An improved splice equivalent modeling method is proposed to describe its working characteristics by using the state-space description, in which the optimization strategy of the circuit structure is studied by using the aspects of equivalent mode, analog calculation, and component distribution adjustment, revealing the mathematical expression mechanism of different structural characteristics. A novel particle adaptive unscented Kalman filtering algorithm is introduced for the iterative calculation to explore the working state characterization mechanism of the packing LIB, in which the incorporate multiple information is considered and applied. The adaptive regulation is obtained by exploring the feature extraction and optimal representation, according to which the accurate SoC estimation model is constructed. The state of balance evaluation theory is explored, and the multiparameter correction strategy is carried out along with the experimental working characteristic analysis under complex conditions, according to which the optimization method is obtained for the SoC estimation model structure. When the remaining energy varies from 10% to 100%, the tracking voltage error is less than 0.035 V and the SoC estimation accuracy is 98.56%. The adaptive working state estimation is realized accurately, which lays a key breakthrough foundation for the safety management of the LIB packs
FOG Random Drift Signal Denoising Based on the Improved AR Model and Modified Sage-Husa Adaptive Kalman Filter
In order to reduce the influence of fiber optic gyroscope (FOG) random drift error on inertial navigation systems, an improved auto regressive (AR) model is put forward in this paper. First, based on real-time observations at each restart of the gyroscope, the model of FOG random drift can be established online. In the improved AR model, the FOG measured signal is employed instead of the zero mean signals. Then, the modified Sage-Husa adaptive Kalman filter (SHAKF) is introduced, which can directly carry out real-time filtering on the FOG signals. Finally, static and dynamic experiments are done to verify the effectiveness. The filtering results are analyzed with Allan variance. The analysis results show that the improved AR model has high fitting accuracy and strong adaptability, and the minimum fitting accuracy of single noise is 93.2%. Based on the improved AR(3) model, the denoising method of SHAKF is more effective than traditional methods, and its effect is better than 30%. The random drift error of FOG is reduced effectively, and the precision of the FOG is improved
FOG Random Drift Signal Denoising Based on the Improved AR Model and Modified Sage-Husa Adaptive Kalman Filter
In order to reduce the influence of fiber optic gyroscope (FOG) random drift error on inertial navigation systems, an improved auto regressive (AR) model is put forward in this paper. First, based on real-time observations at each restart of the gyroscope, the model of FOG random drift can be established online. In the improved AR model, the FOG measured signal is employed instead of the zero mean signals. Then, the modified Sage-Husa adaptive Kalman filter (SHAKF) is introduced, which can directly carry out real-time filtering on the FOG signals. Finally, static and dynamic experiments are done to verify the effectiveness. The filtering results are analyzed with Allan variance. The analysis results show that the improved AR model has high fitting accuracy and strong adaptability, and the minimum fitting accuracy of single noise is 93.2%. Based on the improved AR(3) model, the denoising method of SHAKF is more effective than traditional methods, and its effect is better than 30%. The random drift error of FOG is reduced effectively, and the precision of the FOG is improved
On the Enhancement of the Localization of Autonomous Mobile Platforms
The focus of many industrial and research entities on achieving full robotic autonomy increased in the past few years.
In order to achieve full robotic autonomy, a fundamental problem is the localization, which is the ability of a mobile platform to determine its position and orientation in the environment. In this thesis, several problems related to the localization of autonomous platforms are addressed, namely, visual odometry accuracy and robustness; uncertainty estimation in odometries; and accurate multi-sensor fusion-based localization. Beside localization, the control of mobile manipulators is also tackled in this thesis. First, a generic image processing pipeline is proposed which, when integrated with a feature-based Visual Odometry (VO), can enhance robustness, accuracy and reduce the accumulation of errors (drift) in the pose estimation. Afterwards, since odometries (e.g. wheel odometry, LiDAR odometry, or VO) suffer from drift errors due to integration, and because such errors need to be quantified in order to achieve accurate localization through multi-sensor fusion schemes (e.g. extended or unscented kalman filters). A covariance estimation algorithm is proposed, which estimates the uncertainty of odometry measurements using another sensor which does not rely on integration. Furthermore, optimization-based multi-sensor fusion techniques are known to achieve better localization results compared to filtering techniques, but with higher computational cost. Consequently, an efficient and generic multi-sensor fusion scheme, based on Moving Horizon Estimation (MHE), is developed. The proposed multi-sensor fusion scheme: is capable of operating with any number of sensors; and considers different sensors measurements rates, missing measurements, and outliers. Moreover, the proposed multi-sensor scheme is based on a multi-threading architecture, in order to reduce its computational cost, making it more feasible for practical applications. Finally, the main purpose of achieving accurate localization is navigation. Hence, the last part of this thesis focuses on developing a stabilization controller of a 10-DOF mobile manipulator based on Model Predictive Control (MPC). All of the aforementioned works are validated using numerical simulations; real data from: EU Long-term Dataset, KITTI Dataset, TUM Dataset; and/or experimental sequences using an omni-directional mobile robot. The results show the efficacy and importance of each part of the proposed work
Safety and Reliability - Safe Societies in a Changing World
The contributions cover a wide range of methodologies and application areas for safety and reliability that contribute to safe societies in a changing world. These methodologies and applications include: - foundations of risk and reliability assessment and management
- mathematical methods in reliability and safety
- risk assessment
- risk management
- system reliability
- uncertainty analysis
- digitalization and big data
- prognostics and system health management
- occupational safety
- accident and incident modeling
- maintenance modeling and applications
- simulation for safety and reliability analysis
- dynamic risk and barrier management
- organizational factors and safety culture
- human factors and human reliability
- resilience engineering
- structural reliability
- natural hazards
- security
- economic analysis in risk managemen