Yu Gu
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View article: Cellular plasticity model for self-organized phenotypes in multi-cellular robots
Cellular plasticity model for self-organized phenotypes in multi-cellular robots Open
Robotic systems often struggle to adapt to dynamic, unstructured environments due to top-down design constraints based on human assumptions. Inspired by biological morphogenesis, this study introduces a cellular plasticity model based on T…
View article: Robust Flower Cluster Matching Using The Unscented Transform
Robust Flower Cluster Matching Using The Unscented Transform Open
Monitoring flowers over time is essential for precision robotic pollination in agriculture. To accomplish this, a continuous spatial-temporal observation of plant growth can be done using stationary RGB-D cameras. However, image registrati…
View article: A Kinetic Model for Oxide–Carbonitride Inclusion Heterogeneous Nucleation and Precipitation during Superalloy Solidification
A Kinetic Model for Oxide–Carbonitride Inclusion Heterogeneous Nucleation and Precipitation during Superalloy Solidification Open
Complex oxide–carbonitrides (MgO-Ti(CN), Al2O3-Ti(CN), and MgO·Al2O3-Ti(CN)) are the most common non-metallic inclusions presented in cast and wrought superalloys. In this work, a coupled kinetics model was proposed to predict the complex …
View article: Design of Stickbug: a Six-Armed Precision Pollination Robot
Design of Stickbug: a Six-Armed Precision Pollination Robot Open
This work presents the design of Stickbug, a six-armed, multi-agent, precision pollination robot that combines the accuracy of single-agent systems with swarm parallelization in greenhouses. Precision pollination robots have often been pro…
View article: ‘Swarm of one’ robot is a single machine made up of independent modules
‘Swarm of one’ robot is a single machine made up of independent modules Open
View article: Human-Swarm Interaction Robotics as Context for Training Diverse Undergraduate Researchers
Human-Swarm Interaction Robotics as Context for Training Diverse Undergraduate Researchers Open
We seek to help undergraduate students develop into independent researchers through challenging them with real-world problems utilizing human-swarm interactions as both research context and pedagogical model for how to engage students in u…
View article: Analysis of UAV Thermal Soaring via Hawk-Inspired Swarm Interaction
Analysis of UAV Thermal Soaring via Hawk-Inspired Swarm Interaction Open
A swarm of unmanned aerial vehicles (UAVs) can be used for many applications, including disaster relief, search and rescue, and establishing communication networks, due to its mobility, scalability, and robustness to failure. However, a UA…
View article: Proprioceptive Slip Detection for Planetary Rovers in Perceptually Degraded Extraterrestrial Environments
Proprioceptive Slip Detection for Planetary Rovers in Perceptually Degraded Extraterrestrial Environments Open
Slip detection is of fundamental importance for the safety and efficiency of rovers driving on the surface of extraterrestrial bodies. Current planetary rover slip detection systems rely on visual perception on the assumption that sufficie…
View article: A Scalable Framework for Map Matching Based Cooperative Localization
A Scalable Framework for Map Matching Based Cooperative Localization Open
Localization based on scalar field map matching (e.g., using gravity anomaly, magnetic anomaly, topographics, or olfaction maps) is a potential solution for navigating in Global Navigation Satellite System (GNSS)-denied environments. In th…
View article: Effects of Human Personal Space on the Robot Obstacle Avoidance Be havior: A Human-in-the-loop Assessment
Effects of Human Personal Space on the Robot Obstacle Avoidance Be havior: A Human-in-the-loop Assessment Open
To ensure both the physical and mental safety of humans during human-robot interaction (HRI), a rich body of literature has been accumulated, and the notion of socially acceptable robot behaviors has arisen. To be specific, it requires the…
View article: Socially Aware Robot Obstacle Avoidance Considering Human Intention and Preferences
Socially Aware Robot Obstacle Avoidance Considering Human Intention and Preferences Open
View article: Search Planning of a UAV/UGV Team With Localization Uncertainty in a Subterranean Environment
Search Planning of a UAV/UGV Team With Localization Uncertainty in a Subterranean Environment Open
We present a waypoint planning algorithm for an unmanned aerial vehicle (UAV) that is teamed with an unmanned ground vehicle (UGV) for the task of search and rescue in a subterranean environment. The UAV and UGV are teamed such that the lo…
View article: Slip-Based Autonomous ZUPT Through Gaussian Process to Improve Planetary Rover Localization
Slip-Based Autonomous ZUPT Through Gaussian Process to Improve Planetary Rover Localization Open
The zero-velocity update (ZUPT) algorithm provides valuable state information to maintain the inertial navigation system (INS) reliability when stationary conditions are satisfied. Employing ZUPT along with leveraging non-holonomic constra…
View article: Molecular Characterization and Genomic Analysis of Novel Phage vB_ ShiP-A7 Infecting Multidrug-Resistant Shiglla Fexneri and Escherichia Coli
Molecular Characterization and Genomic Analysis of Novel Phage vB_ ShiP-A7 Infecting Multidrug-Resistant Shiglla Fexneri and Escherichia Coli Open
BackgroundPhage therapy has regained more attention due to the rise of multidrug-resistant (MDR) bacteria. Several case reports demonstrated clinical application of phage in resolving infections caused by MDR bacteria in recent years. Resu…
View article: Cooperative Navigation Using Pairwise Communication with Ranging and Magnetic Anomaly Measurements
Cooperative Navigation Using Pairwise Communication with Ranging and Magnetic Anomaly Measurements Open
The problem of cooperative localization for a small group of Unmanned Aerial Vehicles (UAVs) in a GNSS denied environment is addressed in this paper. The presented approach contains two sequential steps: first, an algorithm called cooperat…
View article: Cooperative UAV Navigation using Magnetic Anomaly Measurements and Limited Inter-Vehicle Ranging Information.
Cooperative UAV Navigation using Magnetic Anomaly Measurements and Limited Inter-Vehicle Ranging Information. Open
The problem of cooperative localization for a small group of Unmanned Aerial Vehicles (UAVs) in a GNSS denied environment is addressed in this paper. The presented approach contains two sequential steps: first, an algorithm called cooperat…
View article: Cooperative Extended State Observer Based Control of Vehicle Platoons With Arbitrarily Small Time Headway
Cooperative Extended State Observer Based Control of Vehicle Platoons With Arbitrarily Small Time Headway Open
We study platoon control of vehicles with linear third-order longitudinal dynamics under the constant time headway policy. The controller of each follower vehicle is only based on its own velocity, acceleration, inter-vehicle distance and …
View article: String Stability of Homogenous Vehicle Platoons Based on Cooperative Extended State Observers
String Stability of Homogenous Vehicle Platoons Based on Cooperative Extended State Observers Open
We study platoon control of homogeneous vehicles with linear third-order longitudinal dynamics with the constant time headway (CTH) policy. In order to ensure string stability with a small time headway, a distributed control law based on e…
View article: Flower Interaction Subsystem for a Precision Pollination Robot
Flower Interaction Subsystem for a Precision Pollination Robot Open
Robotic pollinators not only can aid farmers by providing more cost effective and stable methods for pollinating plants but also benefit crop production in environments not suitable for bees such as greenhouses, growth chambers, and in out…
View article: Efficient Distributed Method for NLOS Cooperative Localization in WSNs
Efficient Distributed Method for NLOS Cooperative Localization in WSNs Open
The accuracy of cooperative localization can be severely degraded in non-line-of-sight (NLOS) environments. Although most existing approaches modify models to alleviate NLOS impact, computational speed does not satisfy practical applicatio…
View article: Effects of Withdrawal Rate on the Microstructure of Directionally Solidified GH4720Li Superalloys
Effects of Withdrawal Rate on the Microstructure of Directionally Solidified GH4720Li Superalloys Open
Increasing the ingot size of GH4720Li superalloys makes it difficult to control their microstructure, and the withdrawal rate is an important factor in controlling and refining the microstructure of GH4720Li superalloys. In this study, GH4…
View article: Effects of Different Melting Technologies on the Purity of Superalloy GH4738
Effects of Different Melting Technologies on the Purity of Superalloy GH4738 Open
The choice of melting technique is crucial for controlling the purity of a superalloy, which is especially important because purity has come to limit progress in the superalloy field. In this study, double- and triple-melting techniques we…
View article: Design of an Autonomous Precision Pollination Robot
Design of an Autonomous Precision Pollination Robot Open
Precision robotic pollination systems can not only fill the gap of declining natural pollinators, but can also surpass them in efficiency and uniformity, helping to feed the fast-growing human population on Earth. This paper presents the d…
View article: Analysis of Pilot-Induced-Oscillation and Pilot Vehicle System Stability Using UAS Flight Experiments
Analysis of Pilot-Induced-Oscillation and Pilot Vehicle System Stability Using UAS Flight Experiments Open
This paper reports the results of a Pilot-Induced Oscillation (PIO) and human pilot control characterization study performed using flight data collected with a Remotely Controlled (R/C) unmanned research aircraft. The study was carried out…
View article: Fixed-Wing UAV Attitude Estimation Using Single Antenna GPS Signal Strength Measurements
Fixed-Wing UAV Attitude Estimation Using Single Antenna GPS Signal Strength Measurements Open
This article considers a novel approach to using global positioning system (GPS) signal strength readings and estimated velocity vector for estimating the attitude of a small fixed-wing unmanned aerial vehicle (UAV). This approach has the …
View article: Flight-Test Evaluation of Kinematic Precise Point Positioning of Small UAVs
Flight-Test Evaluation of Kinematic Precise Point Positioning of Small UAVs Open
An experimental analysis of Global Positioning System (GPS) flight data collected onboard a Small Unmanned Aerial Vehicle (SUAV) is conducted in order to demonstrate that postprocessed kinematic Precise Point Positioning (PPP) solutions wi…
View article: A Fault-Tolerant Multiple Sensor Fusion Approach Applied to UAV Attitude Estimation
A Fault-Tolerant Multiple Sensor Fusion Approach Applied to UAV Attitude Estimation Open
A novel sensor fusion design framework is presented with the objective of improving the overall multisensor measurement system performance and achieving graceful degradation following individual sensor failures. The Unscented Information F…
View article: Autonomous Close Formation Flight Control with Fixed Wing and Quadrotor Test Beds
Autonomous Close Formation Flight Control with Fixed Wing and Quadrotor Test Beds Open
Autonomous formation flight is a key approach for reducing energy cost and managing traffic in future high density airspace. The use of Unmanned Aerial Vehicles (UAVs) has allowed low-budget and low-risk validation of autonomous formation …
View article: Unmanned Aerial Vehicle Navigation Using Wide-Field Optical Flow and Inertial Sensors
Unmanned Aerial Vehicle Navigation Using Wide-Field Optical Flow and Inertial Sensors Open
This paper offers a set of novel navigation techniques that rely on the use of inertial sensors and wide-field optical flow information. The aircraft ground velocity and attitude states are estimated with an Unscented Information Filter (U…