International Journal of Advanced Mechatronic Systems最新文献

{"title":"Vehicle drifting: mathematical theory and dynamic analysis for stabilised drifting of RWD vehicles","authors":"Sina Milani, H. Marzbani, R. Jazar","doi":"10.1504/IJAMECHS.2021.10038137","DOIUrl":"https://doi.org/10.1504/IJAMECHS.2021.10038137","url":null,"abstract":"This paper introduces a mathematical definition for drifting of vehicles. A necessary kinematic condition for enabling negative body side-slip angle at centre of the front wheel during a left-hand turn is identified as drifting indicator. Dynamics of the drifting motion is investigated by means of a simplified three-wheel vehicle model in steady-state, focusing on rear wheel drive (RWD) vehicles. Drifting point is identified as an unstable equilibrium point of the nonlinear system. The equilibrium point is made stable by means of direct control only over yaw velocity, as a single key stabilising objective, and using the steady-state model as feedforward. A four-wheel planar dynamic simulation model is used together with a combined slip tyre model to investigate the accuracy of the proposed analysis. Steady-state RWD drifting motion is achieved by using the proposed method, validating the proposed dynamics analysis. Finally, the drifting metric is used to measure the amount of drifting achieved during a manoeuvre and its effectiveness is observed.","PeriodicalId":38583,"journal":{"name":"International Journal of Advanced Mechatronic Systems","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42007706","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Handling performance criteria evaluation for vehicle suspension system with semi-active control strategies","authors":"M. F. Soong, R. Ramli, A. Saifizul, A. Mamat","doi":"10.1504/IJAMECHS.2021.10038133","DOIUrl":"https://doi.org/10.1504/IJAMECHS.2021.10038133","url":null,"abstract":"The vehicle suspension is an important system in a vehicle which provides ride comfort and handling capability, albeit with a compromise between the two. Semi-active suspension system, which solves this compromise, has been studied frequently with well-known control strategies. However, many of these strategies are designed based on vertical dynamics, focusing on ride improvement. This study evaluates any potential improvement in handling performance brought by a semi-active suspension system with these ride-oriented control strategies. In this study, these were implemented independently on the four wheel stations of a 10-degree-of-freedom full vehicle model which was subjected to step-steering and sine-steering manoeuvres, and the relevant handling performance criteria were evaluated. Results from the simulations indicated that, despite these control strategies mostly being designed for ride comfort, some of them are actually capable of bringing improvement in the handling aspect also, judging from the improvement in a few handling performance criteria.","PeriodicalId":38583,"journal":{"name":"International Journal of Advanced Mechatronic Systems","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49369458","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Simulation with car-following model considering vehicle dynamic features","authors":"Xiaowei Hu, Xiaoyi Ma, D. Schramm","doi":"10.1504/IJAMECHS.2021.10038132","DOIUrl":"https://doi.org/10.1504/IJAMECHS.2021.10038132","url":null,"abstract":"Microscopic traffic simulation has been applied not only for traffic prediction but also in more and more research fields. The typical car-following models widely used in simulation always need massive traffic observation data. By mathematical abstraction from traffic data, some important characteristics of vehicles and drivers will be inevitably abandoned. In this article, a modelling method of car-following behaviour has been proposed, in which the dynamic features of different vehicles have been considered. As an example, an internal combustion engine vehicle model and electric vehicle model were implemented in the traffic simulation. The simulation results of using typical car-following models were also compared with the results using new model. From the result, the new model can display during simulation corresponding dynamic features. The internal combustion engine vehicle model also presented different dynamic characteristics from electric vehicle model, which caused a different simulation result.","PeriodicalId":38583,"journal":{"name":"International Journal of Advanced Mechatronic Systems","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44036529","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"System configuration of instrumented half-scaled armoured vehicle to enhance handling performance due to lateral firing impact","authors":"V. R. Aparow, K. Hudha, M. S. Rahmat, Z. A. Kadir, N. H. Amer","doi":"10.1504/IJAMECHS.2021.10038134","DOIUrl":"https://doi.org/10.1504/IJAMECHS.2021.10038134","url":null,"abstract":"Yaw disturbance rejection control (YDRC) is developed to improve the handling performance of armoured vehicle due firing impact. Therefore, a complete system configuration of instrumented half-scaled armoured vehicle is required to interface the YDRC algorithm with integrated measurement and control (IMC) data acquisition system, inertial measurement unit (IMU) and rotary encoder sensors. By using this configuration, the impact of firing test has been evaluated at maximum firing angle of 90° and vehicle speed of 40 km/h. Based on the actual testing, the handling response of the armoured vehicle in terms of yaw rate and angle, lateral displacement and acceleration has been improved compare to passive armoured vehicle up to 45% of reduction.","PeriodicalId":38583,"journal":{"name":"International Journal of Advanced Mechatronic Systems","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41594146","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Optimal wavelet analysis and enhanced independent component analysis for isolated and combined mechanical faults diagnosis","authors":"T. Thelaidjia, Abdelkrim Moussaoui, S. Chenikher","doi":"10.1504/ijamechs.2020.10033406","DOIUrl":"https://doi.org/10.1504/ijamechs.2020.10033406","url":null,"abstract":"In this paper, a new approach is suggested for isolated and combined mechanical faults diagnosis. The suggested approach consists of two main steps: vibration signal denoising and characteristic frequency extracting. Firstly, an optimal wavelet multi-resolution analysis is employed for reducing noise from vibration signals. Secondly, the enhanced independent component analysis (EICA) algorithm which overcomes the shortcoming of the ICA algorithm and allows selecting the reliable independent components is adopted for source separation. Therefore, simple and comprehensible spectra will be obtained. Finally, the suggested method is tested using real vibration signals. Compared with other approaches, it has been revealed that the suggested method can efficiently be employed to diagnose both isolated and combined mechanical faults.","PeriodicalId":38583,"journal":{"name":"International Journal of Advanced Mechatronic Systems","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42398825","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Operator-based nonlinear fault detection and fault tolerant control for microreactor using one-class SVM","authors":"Yoshiki Ogihara, M. Deng","doi":"10.1504/ijamechs.2020.10033420","DOIUrl":"https://doi.org/10.1504/ijamechs.2020.10033420","url":null,"abstract":"This paper proposes a method of nonlinear fault detection scheme using one-class support vector machine (SVM) and operator-based fault tolerant control system for a microreactor with Peltier device. This method requires only one-shot training data for the normal condition of the plant. The data is used to learn for the SVM, it realises nonlinear fault detection without the known fault condition of the plant. Also, the control system that consists of the nonlinear model of the microreactor system and operator-based controller designed by the model is introduced as the fault tolerant control system using compensation operator to remove the sensor fault. The usefulness of the method is shown by an experiment of the temperature sensor fault case for the temperature control system of the microreactor system.","PeriodicalId":38583,"journal":{"name":"International Journal of Advanced Mechatronic Systems","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42422193","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Obstacle avoidance system and wireless communication for an unmanned underwater vehicle for low depth water surfaces","authors":"A. Selvakumar, Vivek Ghodeswar","doi":"10.1504/IJAMECHS.2020.111300","DOIUrl":"https://doi.org/10.1504/IJAMECHS.2020.111300","url":null,"abstract":"An underwater glider is a most commonly used unmanned underwater vehicle but it has limitations to avoid obstructions in its path. To overcome this problem, the application of obstacle avoiding system is needed. This paper describes the development of an unmanned underwater vehicle (UUV) with integration of sensor-actuator network to avoid obstacles. To study the hydrodynamic behaviour of the proposed UUV, computational fluid dynamics (CFD) is carried out by considering pure surge and heave motion. The UUV is equipped with obstacle avoidance system with infra-red (IR) sensor and wireless communication module. Experimental tests are conducted to understand the behaviour of the UUV in low depth water surfaces and also to validate the CFD simulation results. The UUV's development, motion analyses and preliminary tests in obstacle avoidance are reported.","PeriodicalId":38583,"journal":{"name":"International Journal of Advanced Mechatronic Systems","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43549219","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Structural design and analysis of a lower limb exoskeleton for elderly","authors":"Vishnu Vardhan Dadi, P.V.N.S. Sathwik, D. Mahesh, D. Jaswanth, S. K. Kumar, M. M. Ramya, D. Dinakaran","doi":"10.1504/ijamechs.2020.10033415","DOIUrl":"https://doi.org/10.1504/ijamechs.2020.10033415","url":null,"abstract":"Rehabilitation of the elderly is often limited to restoration of the ability to perform as many activities of daily living. Mobility is identified as most essential rehabilitation required for elderly. Sit-to-stand (STS) manoeuvre is a common aspect of mobility. In this paper, a lower limb exoskeleton is designed to assist elderly during STS cycle. The design of lower limb exoskeleton is tested for its structural strength. The mechanical design of the exoskeleton can adapt to varying body shapes (height, weight and waist circumference) of elderly. Static structural analysis for stand position is carried out in Ansys workbench to find whether the design can withstand a maximum load during the static condition. Modal analysis was done to find the natural frequency vibration of the design and the deformation of the exoskeleton with respect to the mode vibrations.","PeriodicalId":38583,"journal":{"name":"International Journal of Advanced Mechatronic Systems","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47175759","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Maze path planning of mobile robots by gradient map rendering and gradient follow","authors":"A. Selvakumar, A. Das, K. Pavan, D. Dinakaran","doi":"10.1504/ijamechs.2020.10033414","DOIUrl":"https://doi.org/10.1504/ijamechs.2020.10033414","url":null,"abstract":"Path planning for a human being is very easy to reach a desired location in a room, by avoiding obstacles on the way, by generating a mental map and uses this map to find the optimal path. This is a difficult task in case of a robot. In order to make the robot adapt, the system is fed with different obstacle arrangement in the same room and allow the robot to finalise the optimal path avoiding the obstacles. To achieve, the gradient map rendering algorithm is proposed with successful simulation results in MATLAB. The new map produced has given a gradient again using the same algorithm. After the rendering process is completed, the robot climbs up or down the gradient using the maximum or minimum local gradient technique respectively, to find its way to the destination cell. Gradient surface plots are obtained for a variety of mazes to give a visualisation of how the gradient is being formed. Results are obtained after maze simulation successfully shows the most optimised path in any kind of maze.","PeriodicalId":38583,"journal":{"name":"International Journal of Advanced Mechatronic Systems","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43393898","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Treatment approaches for Scheuermann kyphosis: a systematic review of historic and current management.","authors":"Sakibul Huq, Jeffrey Ehresman, Ethan Cottrill, A Karim Ahmed, Zach Pennington, Erick M Westbroek, Daniel M Sciubba","doi":"10.3171/2019.8.SPINE19500","DOIUrl":"10.3171/2019.8.SPINE19500","url":null,"abstract":"<p><strong>Objective: </strong>Scheuermann kyphosis (SK) is an idiopathic kyphosis characterized by anterior wedging of ≥ 5° at 3 contiguous vertebrae managed with either nonoperative or operative treatment. Nonoperative treatment typically employs bracing, while operative treatment is performed with either a combined anterior-posterior fusion or posterior-only approach. Current evidence for these approaches has largely been derived from retrospective case series or focused reviews. Consequently, no consensus exists regarding optimal management strategies for patients afflicted with this condition. In this study, the authors systematically review the literature on SK with respect to indications for treatment, complications of treatment, differences in correction and loss of correction, and changes in treatment over time.</p><p><strong>Methods: </strong>Using PubMed, Embase, CINAHL, Web of Science, and the Cochrane Library, all full-text publications on the operative and nonoperative treatment for SK in the peer-reviewed English-language literature between 1950 and 2017 were screened. Inclusion criteria involved fully published, peer-reviewed, retrospective or prospective studies of the primary medical literature. Studies were excluded if they did not provide clinical outcomes and statistics specific to SK, described fewer than 2 patients, or discussed results in nonhuman models. Variables extracted included treatment indications and methodology, maximum pretreatment kyphosis, immediate posttreatment kyphosis, kyphosis at last follow-up, year of treatment, and complications of treatment.</p><p><strong>Results: </strong>Of 659 unique studies, 45 met our inclusion criteria, covering 1829 unique patients. Indications for intervention were pain, deformity, failure of nonoperative treatment, and neural impairment. Among operatively treated patients, the most common complications were hardware failure and proximal or distal junctional kyphosis. Combined anterior-posterior procedures were additionally associated with neural, pulmonary, and cardiovascular complications. Posterior-only approaches offered superior correction compared to combined anterior-posterior fusion; both groups provided greater correction than bracing. Loss of correction was similar across operative approaches, and all were superior to bracing. Cross-sectional analysis suggested that surgeons have shifted from anterior-posterior to posterior-only approaches over the past two decades.</p><p><strong>Conclusions: </strong>The data indicate that for patients with SK, surgery affords superior correction and maintenance of correction relative to bracing. Posterior-only fusion may provide greater correction and similar loss of correction compared to anterior-posterior approaches along with a smaller complication profile. This posterior-only approach has concomitantly gained popularity over the combined anterior-posterior approach in recent years.</p>","PeriodicalId":38583,"journal":{"name":"International Journal of Advanced Mechatronic Systems","volume":"5 1","pages":"235-247"},"PeriodicalIF":2.9,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88869428","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}