A5069588306- Inertial Sensor and Navigation
- Face recognition and analysis
- Spacecraft Design and Technology
- Emotion and Mood Recognition
- Space Satellite Systems and Control
- Spacecraft Dynamics and Control
- Face and Expression Recognition
- Face Recognition and Perception
- Adaptive Control of Nonlinear Systems
- Astro and Planetary Science
- Adversarial Robustness in Machine Learning
- Real-time simulation and control systems
- Fault Detection and Control Systems
- Fuzzy Logic and Control Systems
- Advanced Optical Sensing Technologies
- Astronomical Observations and Instrumentation
- Authorship Attribution and Profiling
- Anomaly Detection Techniques and Applications
- Ocular and Laser Science Research
- Deception detection and forensic psychology
Tartu Observatory
2019-2024
University of Tartu
2017-2024
Humans modify their facial expressions in order to communicate internal states and sometimes mislead observers regarding true emotional states. Evidence experimental psychology shows that discriminative responses are short subtle. This suggests such behavior would be easier distinguish when captured high resolution at an increased frame rate. We proposing SASE-FE, the first dataset of either congruent or incongruent with underlying emotion show overall problem recognizing whether movements...
The electric solar wind sail, or E-sail, is a propellantless interplanetary propulsion system concept. By deflecting particles off their original course, it can generate propulsive effect with nothing more than an charge. high-voltage charge applied to one multiple centrifugally deployed hair-thin tethers, around which electrostatic sheath created. Electron emitters are required compensate for the electron current gathered by tether. sail also be utilised in low Earth orbit, LEO, when...
This article presents the development of an anti-windup (AW) compensator architecture for nanosatellite systems. The design addresses problem fault-tolerant control (FTC) attitude stabilization subject to actuator saturation, faults, and multiple disturbances. In many practical applications, certain physical limitations in often mean that saturation is mostly unaccounted for. Based on ESTCube-2 model with reaction wheels (RWs), integrated AW–FTC designed optimized system. AW formulated using...
Utilization of satellites to meet the needs various missions requires a reliable Attitude Determination and Control System (ADCS). In this paper, we presents robust design ADCS for ESTCube-2 nanosatellite. The primary aim is provide angular momentum deploy 300-meter tether used in plasma brake deorbiting experiment. This achieved by spinning up three-unit CubeSat 360 degrees per second about short axis, deploying repeating spin-up-deployment sequence until whole deployed. system also...
Action recognition is a challenging task that plays an important role in many robotic systems, which highly depend on visual input feeds. However, due to privacy concerns, it find method can recognise actions without using feed. In this paper, we propose concept for detecting while preserving the test subject's privacy. Our proposed relies only recording temporal evolution of light pulses scattered back from scene. Such data trace record one action contains sequence one-dimensional arrays...
This paper presents the design and study of cross product control, Linear-Quadratic Regulator (LQR)optimal control high spin rate algorithms for ESTCube-2/3 missions. The three-unit CubeSat is required to up in order centrifugally deploy a 300-m long tether plasma brake deorbiting experiment. algorithm designed satellite one rotation per second which achieved 40 orbits. LQR optimal controller based on closed-loop step response with controllability stability analysis meet pointing...
Humans modify their facial expressions in order to communicate internal states and sometimes mislead observers regarding true emotional states. Evidence experimental psychology shows that discriminative responses are short subtle. This suggests such behavior would be easier distinguish when captured high resolution at an increased frame rate. We proposing SASE-FE, the first dataset of either congruent or incongruent with underlying emotion show overall problem recognizing whether movements...
The development of attitude control systems in recent years have increasingly focused on Fault Tolerant Control (FTC) capabilities to deal with sensor and actuator faults as well saturation. FTC could either be active or passive the former involving real-time fault detection isolation schemes. A detailed integrated architecture for is presented ESTCube-2 nanosatellite mission. design involves centralized decentralized Anti-Windup (AW) compensator an Adaptive Neuro-Fuzzy Inference System...
In this paper, a decentralized anti-windup (AW) fault tolerant control (FTC) scheme is presented to deal with precise attitude stabilization and address the problem of spacecraft model uncertainties, external disturbances, actuator faults saturation. To accomplish desired mission requirement fine pointing, design will feature nominal controller based on classical Proportional Derivative (PD) law. Additionally, FTC involve an individual AW compensator for each channel representing principal...