Aleksandar Subic

Aleksandar Subic
Swinburne University of Technology · Swinburne Research

34.56
 · 
PhD, MEngSci, BEng(Mech Eng) (Hons), GradCertHEd

About

299
Publications
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3,245
Citations

Publications

Publications (299)
Article
Research has demonstrated that a better-fitted bicycle helmet offers improved protection to the rider during an impact. Nowadays, bicycle helmets in the market that range in size from small/medium to medium/large might not fit the diverse range of human head shapes and dimensions. 3D scanning was used to create 3D head shape databases of 20 partici...
Article
Full-text available
Mass customisation (MC) can provide significant benefits to the customers. For example, custom-fit design approaches can improve the users' perceived comfort of products where the fit is an important feature. MC can also bring major value to the producers, where for instance, premium prices can be implemented to the products. Research show that MC...
Article
Full-text available
In numerous studies, it was emphasised that only a few of patented shape memory alloy applications are commercially successful due to material limitations combined with a lack of material and design knowledge and associated tools. This work further emphasises that these limitations may be improved or even resolved with proper design approaches and...
Article
Full-text available
In recent years, the use of 3D anthropometry for product design has become more appealing because of advances in mesh parameterisation, multivariate analyses and clustering algorithms. The purpose of this study was to introduce a new method for the clustering of 3D head scans. A novel hierarchical algorithm was developed, in which a squared Euclide...
Article
An estimated 10% of stroke patients have an underlying dementia. As a consequence, health professionals often face the challenge of managing patients with dementia presenting with an acute stroke. Patients with dementia are less likely to receive thrombolysis (0.56–10% vs. 1–16% thrombolysis rates in the general population), be admitted to a stroke...
Article
Full-text available
Traditional 1D anthropometric data have been the primary source of information used by ergonomists for the dimensioning of head and facial gear. Although these data are simple to use and understand, they only provide univariate measures of key dimensions. 3D anthropometric data, however, describe the complete shape characteristics of the head surfa...
Article
Finite element simulations of a rollover protective structure are an important aspect in its design, as it provides a means of structural integrity qualification prior to the required destructive testing. A good understanding of the rollover protective structure behaviour under simulated loading offers engineering practitioners the opportunity to o...
Article
Full-text available
3D anthropometry has provided much-needed information about the size and shape of the head, which can be used to improve the fit of protective helmets. In this study, a new 3D head scan sizing method was implemented in a reverse engineering approach for bicycle helmet liner dimensioning. The inside liner of a commercially available helmet was modif...
Article
The purpose of the study was to develop an evidence-based method for identification and classification of wheelchair sports (rugby) activities and performance during a match using fractal dimensions. The approach involves five wheelchair rugby athletes of different classifications who were monitored during six different matches using mobile devices...
Article
Full-text available
Bicycle helmet is currently available to cater to general head sizes, ranging from S/M and L/XL, but there is also a universal model that can fit all sizes through adjustable helmet strap. However, numerous surveys addressed that wearing helmet is not comfortable and the current sizing did not accommodate the range of the user. This is due to the c...
Chapter
Soft tissue deformation is of great importance to virtual reality based surgery simulation. This paper presents a new methodology for modelling of nonlinear soft tissue deformation from the physicochemical viewpoint of soft tissues. This methodology converts soft tissue deformation into nonlinear chemical–mechanical interaction. Based on this, chem...
Chapter
Nonlinear filtering is of great importance in many applied areas. As a typical nonlinear filtering algorithm, the unscented Kalman filter (UKF) has the merits such as simplicity in realization, high filtering precision, and good convergence. However, its filtering performance is very sensitive to system model error. To overcome this limitation, thi...
Article
This paper presents a method to characterize tissue thermal damage by taking into account the thermal-mechanical effect of soft tissues for thermal ablation. This method integrates the bio-heating conduction and non-rigid motion dynamics to describe thermal-mechanical behaviors of soft tissues and further extends the traditional tissue damage model...
Article
The Kalman filter requires kinematic and observation models not contain any systematic error. Otherwise, the resultant navigation solution will be biased or even divergent. In order to overcome this limitation, this paper presents a new random weighting method to estimate the systematic error of observation model in dynamic vehicle navigation. This...
Article
Full-text available
Helmet safety benefits are reduced if the headgear is poorly fitted on the wearer's head. At present, there are no industry standards available to assess objectively how a specific protective helmet fits a particular person. A proper fit is typically defined as a small and uniform distance between the helmet liner and the wearer's head shape, with...
Article
Full-text available
Metal additive manufacturing techniques have been increasingly attracting the interest of the aerospace and biomedical industry. A particular focus has been on high value and complexity parts and components, as there the advantages offered by additive manufacturing are very significant for the design and production organisations. Various additive m...
Article
Full-text available
Polocrosse is one of a few truly Australian sports that combines elements of polo, lacrosse and netball. It is played on horseback whereby a rider using a racquet with a loose twisted-thread net aims to carry a ball and throw a goal. Since hitting at an opponent's racquet is the only way to dislodge the ball or prevent the opponent from gaining pos...
Article
Full-text available
Personalised design of a consumer product such as faceguard is dominantly semantic design as its functional component is strictly governed by safety requirements specified by the standards. This paper, which outlines activities associated with design of a personalised cricket faceguard for a prominent elite cricketer, uses earlier developed methodo...
Article
Full-text available
Currently certain standards for consumer products are expected which are mainly based around functionality, aesthetics, ease-of-use, affordability, safety, etc. Currently, smarter products that meet the user’ functional and psychological needs are in demand. This paper presents an approach that was effective in identifying and quantifying subjectiv...
Article
Full-text available
Physical models are desirable in engineering education as they enhance visual literacy, provide insight into critical design failure modes and design attributes, and can be implemented in a classroom scenario in concert with multimedia displays and lecture slides. Despite the advantage, such physical models are often: not commercially available; ar...
Article
Full-text available
Impact attenuation performance of three different range of commercial bicycle helmet were investigated in lateral drop impact test in accordance to AS/NZS 2063:2008, Australian/New Zealand Standard for bicycle helmet using numerical simulation and and experimental impact test. The aim of this research is to develop a simulation model of drop impact...
Article
Full-text available
It has been reported that wearing a protective helmet reduces airflow around the head and leads to an increase in heat-related stress and discomfort due to excessive sweat. The main objective of this study is toinvestigate vent designs in order to improve the air ventilation and heat dissipation in cricket helmets. An experiment was conducted in a...
Article
The use of the direct filtering approach for INS/GNSS integrated navigation introduces nonlinearity into the system state equation. As the unscented Kalman filter (UKF) is a promising method for nonlinear problems, an obvious solution is to incorporate the UKF concept in the direct filtering approach to address the nonlinearity involved in INS/GNSS...
Article
The main objective of this work was to develop a methodology for optimising the hood assembly for minimal deformation with robust and homogeneous impact behaviour in a pedestrian head impact. In practice, the design of the outer and inner hood panels must meet all general design requirements in addition to pedestrian head impact performance. This s...
Article
Full-text available
This paper presents a new method for real-time modelling soft tissue deformation. It improves the traditional mass-spring model with conical springs to deal with nonlinear mechanical behaviours of soft tissues. A conical spring model is developed to predict soft tissue deformation with reference to deformation patterns. The model parameters are for...
Article
Inertial navigation system (INS)/global navigation satellite system (GNSS)/ celestial navigation system (CNS) integration is a promising solution to improve the performance of navigation due to the complementary characteristics of INS, GNSS, and CNS. Nevertheless, the information fusion involved in INS/GNSS/CNS integration is still an open issue. T...
Conference Paper
Full-text available
Design specialists have acknowledged the need for more accurate measurements of human anthropometry through the use of 3D data, especially for the design of head and facial equipment. However, 3D anthropometric surveys of the human head are sparse in the literature and practically non-existent for Australia. Research published to date has not propo...
Conference Paper
Full-text available
Bicycle helmets are currently available to cater to general head sizes, ranging from S/M and L/XL, but there is also a universal model that can fit all sizes through adjustable helmet strap. Numerous surveys addressed that wearing helmet is not comfortable and the current sizing did not accommodate various range of users, because the human head sha...
Conference Paper
Full-text available
In order for bicycle helmets to maintain sufficient coverage and protection of riders, the helmets must be adequately positioned and secured on the head. This research investigates helmet's dynamic stability parameters in order to determine whether a customised liner can improve the retention and therefore safety. A specialist 3D scanner was used t...
Article
Full-text available
The demand for shape memory alloy (SMA) actuators in high-technology applications is increasing; however, there exist technical challenges to the commercial application of SMA actuator technologies, especially associated with actuation duration. Excessive activation duration results in actuator damage due to overheating while excessive deactivation...
Article
The demand for shape memory alloy (SMA) actuators in high-technology applications is increasing; however, there exist technical challenges to the commercial application of SMA actuator technologies, especially associated with actuation duration. Excessive activation duration results in actuator damage due to overheating while excessive deactivation...
Conference Paper
Full-text available
Impact attenuation performance of three different range of commercial bicycle helmet were investigated in lateral drop impact test in accordance to AS/NZS 2063:2008, Australian/ New Zealand Standard for bicycle helmet using numerical simulation and and experimental impact test. The aim of this research is to develop a simulation model of drop impac...
Article
This paper presents a new random weighting method to deal with the systematic error of the kinematic model for dynamic navigation. This method incorporates random weights in the kinematic model to control the systematic error of the kinematic model for improving the navigation accuracy. A theory of random weighting estimation is established, showin...
Chapter
Full-text available
This chapter reviews the key areas of research focus in the Australian aviation sector, as well as the associated needs, challenges and opportunities. The main topics include improved efficiency and capacity of airports, integrated Air Traffic Management (ATM) systems and technologies, cost-effective through-life support of new and ageing aircraft,...
Article
Full-text available
This paper presents a modified version of federated Kalman filter (FKF) for INS/GNSS/CNS integration by improving the computational efficiency involved in the FKF's master filter. During the master filtering process, the modified federated Kalman filter (MFKF) firstly decomposes the global state vector into three sub-states according to the charact...
Conference Paper
Full-text available
Metal additive manufacturing techniques have been increasingly attracting the interest of the aerospace and biomedical industry. A particular focus has been on high value and complexity parts and components, as there the advantages offered by additive manufacturing are very significant for the design and production organisations. Various additive m...
Article
Full-text available
This paper presents a modified strong tracking unscented Kalman filter (MSTUKF) to address the performance degradation and divergence of the unscented Kalman filter because of process model uncertainty. The MSTUKF adopts the hypothesis testing method to identify process model uncertainty and further introduces a defined suboptimal fading factor int...
Article
This paper presents a new method for adaptive estimation of kinematic model error in dynamic aircraft navigation. This method combines the concepts of random weighting and Sage windowing to online monitor predicted and observation residuals to control the influence of the kinematic model???s systematic error on system state estimation. Based on the...
Article
Full-text available
Statistical tolerance analysis and synthesis in assemblies subject to loading are of significant importance to optimized manufacturing. Modeling the effects of loads on mechanical assemblies in tolerance analysis typically requires the use of numerical CAE simulations. The associated uncertainty quantification (UQ) methods used for estimating yield...
Article
Full-text available
The demand for shape memory alloy (SMA) actuators for technical applications is steadily increasing; however SMA may have poor deactivation time due to relatively slow convective cooling. Convection heat transfer mechanism plays a critical role in the cooling process, where an increase of air circulation around the SMA actuator (i.e. forced convect...
Book
This volume collects the research papers presented at the 6th International Conference on Sustainable Automotive Technologies (ICSAT), Gothenburg, 2014. The topical focus lies on latest advances in vehicle technology related to sustainable mobility. ICSAT is the core and state-of-the-art conference in the field of new technologies for transportatio...
Article
Full-text available
Shape memory alloy (SMA) actuators have drawn much attention and interest due to their unique and superior properties, and are expected to be equipped in many modern vehicles at competitive market prices. The key advantage is that SMA actuators do not require bulky and complicated mechanical design to function, where the active element (e.g. SMA wi...
Conference Paper
Full-text available
While a bicycle helmet protects the wearer’s head in the event of a crash, not every user benefits to the same extent when wearing the headgear. A proper fit with the cyclist’s head is found to be one of the most important attributes to improve protection during impact. A correct fit is defined as a small and uniform distance between the helmet lin...
Conference Paper
Full-text available
Shape memory alloy (SMA) wires demand in many engineering and technical applications are increasing lately, but there are some concerns about the material performance over their design life. This poster summarize the research that has been conducted to investigate the structural fatigue on SMA wires under tensional and bending stresses.
Article
Full-text available
Modeling of thermal-induced mechanical behaviors of soft tissues is of great importance for thermal ablation. This paper presents a method by integrating the heating process with thermal-induced mechanical deformations of soft tissues for simulation and analysis of the thermal ablation process. This method combines bio-heat transfer theories, const...
Chapter
This paper presents three-point bending analysis of a porous beam using the finite element method. This novel porous structure emulates the structure of trabecular (cancellous) bone at the metaphysis of a rabbit. Segments of the bone were scanned using a high-resolution CT-scanner. The bone geometry was recreated and a finite element mesh was gener...
Conference Paper
Full-text available
Modelling the effects of loads on mechanical assemblies in statistical tolerance analysis typically requires the use of computationally demanding numerical simulations. The associated Uncertainty Quantification (UQ) methods used for estimating yield are typically based on robust, yet computationally inefficient Monte Carlo (MC) simulation. Identify...
Article
Full-text available
The ISO 2631-1 (199711. ISO 2631-1 (International Organisation for Standardisation). 1997. Mechanical Vibration and Shock – Evaluation of Human Exposure to Whole-Body Vibration – Part 1: General Requirements. Geneva: ISO 2631-1, International Organisation for Standardisation.View all references) provides methodologies for assessment of the seated h...
Article
Full-text available
Shape memory alloys (SMAs) belong to a class of shape memory materials (SMMs), which have the ability to ‘memorise’ or retain their previous form when subjected to certain stimulus such as thermomechanical or magnetic variations. SMAs have drawn significant attention and interest in recent years in a broad range of commercial applications, due to t...
Article
Full-text available
In order to improve operating noise performance of a seat adjuster mechanism, benchmarking measurements were conducted in different cars for six and eight types of seat adjustment operation. The six types of operation include: seat moving up, seat moving down, seat front end up, seat front end down, seat rear end up and seat rear end down. The eigh...
Article
Full-text available
Competitive wheelchair sport performance is dependent on three factors: the athlete, the wheelchair, and the interaction between the athlete and the wheelchair (Goosey-Tolfrey, 2010, "Supporting the Paralympic Athlete: Focus on Wheeled Sports," Disabil Rehabil., 32(26), pp. 2237-2243). In order to effectively refine the user interphase design of th...
Article
Full-text available
At a present level af technology, almost all machine parts are subjected to combined loads in real working condition. The aim of research described in this paper is to highlight the importance of combined load simulation for the calculation of machine parts load capacity. This research is inspired by one failure case study of hydro turbine shaft. T...
Chapter
An application of a novel methodology in a redesign of the load bearing subassembly of an automotive seat adjuster is presented. This novel methodology efficiently evaluated concept variations at a higher rate than the traditional approach based on FEA and therefore enables a comparison of the objective spaces rather than undesirable point design c...
Article
Full-text available
The vehicle seat has robust structural dynamics characteristics which typically comprise of a maximum of three known vibration mode shapes at low frequencies (< 70 Hz). The goal of this paper is to investigate whether the seat rattle can be predicted and managed from its structural dynamics. The amplitude (loudness) and the high fractal dimensions...
Article
This paper presents a new robust adaptive central difference particle filtering method for nonlinear systems by combining the concept of robust adaptive estimation with the central difference particle filter. This method obtains system state estimate and covariances using the principle of robust estimation. Subsequently, the importance density is o...
Article
Laboratory practice plays a crucial role in engineering and technology education. The advancement of computational and computer technologies have ushered in a new horizon in learning and teaching of laboratory practices worldwide. Apart from traditional hands-on laboratory practice, two other laboratories, namely the virtual/simulated laboratory an...
Article
Full-text available
The establishment of strict emission regulations is forcing car manufacturers to design low emission vehicles. This has led to the use of lightweight materials and multi-material concepts to reduce the vehicle weight. Lightweight vehicle structures reduce the energy consumption during use phase, however it also creates difficulties joining of mater...
Article
Full-text available
Many researches have debated that the current 2-wire drop test method (AS/NZS 4499.1:1997 and AS/NZS 2512.3.2:1997) for cricket helmets does not adequately represent the dynamics of a real ball-helmet impact for fast, elite and express bowlers. This paper presents a new pitching machine test method that was developed to measure the impact performan...
Article
Full-text available
Roller skis are used by cross-country skiers, biathletes and ski-orienteers for their snow-free training and in roller ski competitions. Additionally, much of the current sports research into the p ...