Shaohui Foong

Shaohui Foong
Singapore University of Technology and Design · Division of Engineering Product Development

BSc, MS, PhD in Mechanical Engineering

About

158
Publications
30,525
Reads
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1,252
Citations
Citations since 2016
120 Research Items
1151 Citations
2016201720182019202020212022050100150200250
2016201720182019202020212022050100150200250
2016201720182019202020212022050100150200250
2016201720182019202020212022050100150200250
Additional affiliations
October 2018 - present
Singapore University of Technology and Design
Position
  • Professor (Associate)
Description
  • Aerial Innovation Research Laboratory, Design and Research in Extreme Systems (DARES) Laboratory
October 2018 - present
Singapore University of Technology and Design
Position
  • Professor (Associate)
January 2011 - September 2018
Singapore University of Technology and Design
Position
  • Professor (Assistant)
Education
January 2006 - August 2008
Georgia Institute of Technology
Field of study
  • Mechanical Engineering
January 2006 - December 2010
Georgia Institute of Technology
Field of study
  • Mechanical Engineering
August 2002 - December 2005
Georgia Institute of Technology
Field of study
  • Mechanical Engineering

Publications

Publications (158)
Article
Full-text available
Herein, the development of a multimodal, nature‐inspired unmanned aerial vehicle (UAV) that operates in three different flight regimes (rotor wing, tailsitter, cruise), unlike typical UAVs which only consist of two, is discussed. The platform uses a nature‐inspired method to achieve efficient hover, yet possesses the flexibility to enter a more agi...
Conference Paper
Design principles have been developed in many application fields to codify and formalize expert knowledge to increase the likelihood of design success. While there are abundant design principles reported, most of them have not been validated. However, many have been shown to result in more creative ideas, creating variety in ideas and stimulating i...
Article
Full-text available
Monocopters are nature-inspired, single-wing, rotating aerial vehicles that fly by spinning their entire body. Meanwhile, bicopters are twin propeller-based aerial vehicles that control their attitude by changing the direction of thrust from the motors using two servos. In this paper, we present a novel single-wing aerial vehicle, which can fly in...
Article
Full-text available
Even as human–robot interactions become increasingly common, conventional small Unmanned Aircraft Systems (sUAS), typically multicopters, can still be unsafe for deployment in an indoor environment in close proximity to humans without significant safety precautions. This is due to their fast-spinning propellers, and lack of a fail-safe mechanism in...
Article
The cover image is based on the Research Article Towards fluid force estimation of a water‐jetting aerial robot with hybrid kinematics‐force model by Shawndy M. Lee et al., https://doi.org/10.1002/rob.22079.
Article
The paper presents the first Biplane-Inspired Monocopter (BIM). The novelty of BIM lies on the staggered second wing above the main wing increasing the aspect ratio for a given maximum wingspan. According to General Biplane Theory, this theoretically reduces the induced drag and creates more lift area. Fused Deposition Modelling is instrumental in...
Article
The field of aerial robotics has advanced rapidly, but the design knowledge has not yet been codified into reusable design guidelines. Design guidelines have been developed for many mechanical design areas to advance the field itself and help novice designers benefit from past expert knowledge more easily. We used an inductive approach and collecte...
Article
In this paper, we propose a ground-based monocular UAV localisation system that detects and localises an LED marker attached to the underside of a UAV. Our system removes the need for extensive infrastructure and calibration unlike existing technologies such as UWB, radio frequency and multi-camera systems often used for localisation in GPS-denied...
Article
In this paper, a three‐dimensional hybrid kinematics‐force (HKF) model for fluid force estimation coupled with position optimization of an aerial robot capable of high‐pressure fluid ejection is presented. Motivated by the archerfish's unique (water‐jetting) hunting mechanics, the HKF model comprises of two sub‐models (hybrid kinematics and fluid f...
Article
Full-text available
Safe tool-tissue interaction is critical in medicine. The exerted force or torque on the tissue is required to be under control. This paper presents a design framework for producing simple mechanisms with adjustable constant force or torque. The constant load is generated by paralleling a positive constant stiffness spring and a negative constant s...
Article
Full-text available
For fast-moving event cameras, projection of events onto the image frame exhibits smearing of events analogous to high motion blur. For camera attitude estimation, this presents a causality dilemma where motion prior is required to unsmear events, but an image prior is required to estimate motion. This dilemma is typically circumvented by including...
Article
Full-text available
This paper presents an investigation of the fluid–structure interaction (FSI) effects on the stability of a quadrotor attached to a flexible hose conveying and ejecting pressurised fluid from an onboard nozzle. In this study, an analytical solution is derived to obtain the time and spatial responses of the free end, which could affect the quadrotor...
Article
Full-text available
This paper presents the Flying Lidar (Flydar) aerial robot for simultaneous localization and mapping (SLAM). The Flydar integrates a single laser and capitalizes on the rotating dynamics of a nature-inspired aerial robot for omnidirectional scanning. This paper presents a 2.5D SLAM approach using the Flydar and does not assume that the Flydar’s hov...
Article
Fused filament fabrication (FFF) 3D printing is one of the most common additive processes due to its low cost and speed of production. There has been growing interest to have a fleet of such printers, which can be procured at low cost, as they have enormous potential of providing a large volume of continuous production of customized parts on demand...
Article
Full-text available
The monocopter is a type of micro aerial vehicle largely inspired from the flight of botanical samaras ( Acer palmatum ). A large section of its fuselage forms the single wing where all its useful aerodynamic forces are generated, making it achieve a highly efficient mode of flight. However, compared to a multi-rotor of similar weight, monocopters...
Article
We propose the Boerdijk–Coxeter Helix (BC Helix) model geometry as a potential node configuration for human users who are localizing within an unstructured environment. When the localization nodes are placed in Boerdijk–Coxeter Helix geometry, the nodes form a regular pattern such that the user can plant new nodes in his or her direction of travel...
Conference Paper
The field of aerial robotics has advanced rapidly, but the design knowledge has not yet been codified into reusable design principles. Design principles have been developed for many other areas of mechanical design to both advance the field itself and help novice designers benefit from the past expert knowledge easier. We used an inductive approach...
Article
Full-text available
Large scale aerial deployment of miniature sensors in tough environmental conditions requires a deployment device that is lightweight, robust, and steerable. We present a novel samara-inspired autorotating craft that is capable of two flight modes (autorotating mode and diving mode) with an average glide angle of 28.9 $^{\circ }$ (1.81 m lateral d...
Conference Paper
General Visual Inspection is a manual inspection process regularly used to detect and localise obvious damage on the exterior of commercial aircraft. There has been increasing demand to perform this process at the boarding gate to minimize the downtime of the aircraft and automating this process is desired to reduce the reliance on human labour. Th...
Article
Full-text available
This paper details the development of a geometrical-based displacement extraction framework capable of automatically extracting critical infrastructure measurements in one sequence. The framework is a novel rail viaduct bearing inspection pipeline implemented on BINOv2: Bearing Inspector for Narrow-space Observation Version 2. BINOv2 is a tethered...
Article
In this work, a collaborative co-evolution approach is adopted to solve a joint physical design and feedback control optimization problem of a nature-inspired Unmanned Aerial Vehicle (UAV). Unlike traditional multirotors and fixed-wing aircraft, lift is achieved by spinning its entire body with attached aerofoils around a central axis and positiona...
Patent
Full-text available
A climbing robot including a chassis having a front portion and a rear portion, wherein the front portion and the rear portion are opposite end portions of the chassis along a forward movement axis of the chassis; at least one multi -legged rotary component including a hub rotatably coupled to the front portion of the chassis in an orientation with...
Conference Paper
Full-text available
The insertion and removal of central venous catheter are associated with potentially fatal bleeding risk. This paper presents the design and development of BWatch, an effective stand-alone electronic device that continuously monitors the catheter insertion and extraction site for critical re-bleeding, that alerts medical staff immediately for prope...
Article
Full-text available
The ability to fabricate overhang structures in WAAM (wire arc additive manufacturing) is vital in ensuring that a wide variety of designs can be realised. Unlike other additive manufacturing techniques that leverage on the addition of support structures, WAAM utilises a support-free approach for overhang fabrication to ensure components achieve a...
Article
Robots, unlike humans, are designed and engineered to operate in a variety of extreme conditions. In many applications where human presence is dangerous, difficult or undesirable, these mobile robotic systems remain the only method of performing and completing critical tasks in the air, on land and above water or underwater. In order to operate eff...
Chapter
In wire arc additive manufacturing, weld beads are deposited layer-by-layer leading to the final part geometry. The printed geometry of the weld bead depends on various factors and is therefore hard to predict and control accurately. These errors will lead to large deviation between the actual and the expected print layer thickness, deteriorates th...
Article
Full-text available
Lightweight structures with slender features and thin walls can be fabricated by the additive manufacturing process. The fabrication process utilizes a contour parallel toolpath, where a set of parallel contours are offset from the boundaries of a geometric structure at predefined intervals, to deposit the material layer by layer. Currently, these...
Article
Full-text available
Development of mesoscale robots is gaining interest in security and surveillance domains due to their stealth and portable nature in achieving tasks. Their design and development require a host of hardware, controls, and behavioral innovations to yield fast, energy-efficient, distributed, adaptive, robust, and scalable systems. We extensively descr...
Preprint
Full-text available
Advances in Unmanned Aerial Vehicle (UAV) opens venues for application such as tunnel inspection. Owing to its versatility to fly inside the tunnels, it can quickly identify defects and potential problems related to safety. However, long tunnels, especially with repetitive or uniform structures pose a significant problem for UAV navigation. Further...
Conference Paper
Full-text available
This paper presents the design of a highly manoeuvrable and untethered under-actuated legged piezoelectric miniature robot called PISCES. It comprises of a piezoelectric patch bonded onto a thin diamond-shaped aluminium plate to form a planar unimorph piezoelectric actuator, with three rigidly attached legs to generate locomotion. Unlike other unde...
Preprint
In this paper, we consider the problem of collectively exploring unknown and dynamic environments with a decentralized heterogeneous multi-robot system consisting of multiple units of two variants of a miniature robot. The first variant-a wheeled ground unit-is at the core of a swarm of floor-mapping robots exhibiting scalability, robustness and fl...
Article
Full-text available
Unmanned Aerial Vehicles (UAV) have gained massive interest due to their wide range of applications. In this work, we focus on the design of compact rotation speed sensors (RSS) and air flow sensors (AFS) that can be integrated into nature-inspired monocopters UAVs which generate lift by spinning at high frequencies. Combining barometric sensors an...
Conference Paper
Borrowing dispersion methodology from its natural cousin ’maple seed’, the Solar Samara Autorotating Wings (SSAW) uses autorotation as the means of slowing down the descent rate and uses no propulsion for the entire flight envelope. It carries a limited battery which powers the control flap for regulated descent and on-board sensors for data collec...
Article
To deliver lightweight sensor payloads to disaster-struck areas by means of an aerial deployment, a novel bio-inspired method capitalizing on autorotation to slow down vertical descent rate is proposed. This concept is illustrated using the Samara Autorotating Wing (SAW) platform which features a unique collaborative mode where multiple individual...
Article
Full-text available
Mobile robotic systems are crucial when performing diverse tasks operating in the air, on land, and above water or underwater. They are especially invaluable in highly challenging environments where human presence is dangerous, difficult or undesirable due to extreme environmental factors. In order to operate efficiently and demonstrate high intell...
Chapter
Full-text available
Plane-to-plane transitioning is essential for climbing robots to overcome obstacles. In existing literature, additional actuator or robot module is usually required for external transitioning, which significantly increases both size and weight of the robot. Recently, it has been shown [1] that a simple passive vertical tail can aid a lot in achievi...
Article
Full-text available
Current methods of airdropping payloads accurately use the autonomously guided parafoil systems. Such approaches have limited trajectory options, hence limited accuracy, and could deliver only one payload with one airdrop. The Samara Autorotating Wings (SAW) is disposable type of aerial deployment system proposed in this paper to drop light-weight...
Conference Paper
Plane-to-plane transitioning has been a significant challenge for climbing robots. To accomplish this, additional actuator or robot module is usually required which significantly increases both size and weight of the robot. This paper presents a two-wheg miniature climbing robot with a novel passive vertical tail component which results in robust t...