Journal of Mechanical Engineering, Automation and Control Systems最新文献_第2页

PSO optimum control strategy of 7 degrees of freedom semi-active suspensions 七自由度半主动悬架的粒子群优化控制策略

Journal of Mechanical Engineering, Automation and Control Systems Pub Date : 2021-12-15 DOI: 10.21595/jmeacs.2021.22164

Yeonsung Choi, Jubin Qiao, Fuqiang Yang

引用次数: 0

Dynamic performance of engine timing transmission system with RU type synchronous belt RU型同步带发动机正时传动系统的动态性能

Journal of Mechanical Engineering, Automation and Control Systems Pub Date : 2021-11-11 DOI: 10.21595/jmeacs.2021.22178

Q. Hu, Junpeng Hou, Dandan Sun, Jianhua Guo

{"title":"Dynamic performance of engine timing transmission system with RU type synchronous belt","authors":"Q. Hu, Junpeng Hou, Dandan Sun, Jianhua Guo","doi":"10.21595/jmeacs.2021.22178","DOIUrl":"https://doi.org/10.21595/jmeacs.2021.22178","url":null,"abstract":"The dynamic characteristic of the timing system has a significant impact on the performance of the engine's NVH. With low contact stress and strong anti-interference ability, the arc tooth synchronous belt was adopted by engine timing transmission system. The multi-body dynamics model of the in-line four cylinder engine timing system was established. We explored the influence of crankshaft speed and initial tension on the dynamic performance of the engine timing system. The result shows when the crankshaft speed V 2000 r/min and the initial tension of the synchronous belt F 300 N, the load distribution of the RU type synchronous belt teeth root is more uniform. The stress is 0.2474 N/mm2 lower than the average value, and the transverse vibration amplitude decreases by 0.3067 mm. Under this circumstance, the fluctuation amplitude of camshaft angular velocity is 6.5312 rad/s lower than the maximum average amplitude, so the transmission error is reduced by 37.95 %. The fluctuation amplitude of interference value decreases by 0.3413 mm, and the fluctuation amplitude of interference velocity decreases by 263.8908 mm/s. The synchronous belt based engine timing transmission is more stable and the dynamic performance is better. It laid a solid foundation for the optimization of the tooth profile and load conditions of the engine timing system.","PeriodicalId":162270,"journal":{"name":"Journal of Mechanical Engineering, Automation and Control Systems","volume":"217 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122926847","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}

引用次数: 0

Parameter optimization of AISI 316 austenitic stainless steel for surface roughness by Grasshopper optimization algorithm 用Grasshopper优化算法优化AISI 316奥氏体不锈钢表面粗糙度参数

Journal of Mechanical Engineering, Automation and Control Systems Pub Date : 2021-10-18 DOI: 10.21595/jmeacs.2021.22149

Omkar Kulkarni, S. Jawade, G. Kakandikar

{"title":"Parameter optimization of AISI 316 austenitic stainless steel for surface roughness by Grasshopper optimization algorithm","authors":"Omkar Kulkarni, S. Jawade, G. Kakandikar","doi":"10.21595/jmeacs.2021.22149","DOIUrl":"https://doi.org/10.21595/jmeacs.2021.22149","url":null,"abstract":"This article describes the optimization of processing parameters for the surface roughness of AISI316 austenitic stainless steel. While experimenting, parameters in the process like feed rate (fd), speed (vc), and depth of cut (DoC) were used to study the outcome on the surface roughness (Ra) of the workpiece. The experiment was carried out using the design of experiments (DOE) on a computer numerical control (CNC) lathe. The surface roughness is tested for three conditions i.e. Dry, Wet, and cryogenic conditions after the turning process. Samples are step turned on CNC Lathe for all three conditions with a set of experiments designed. The response surface methodology is implemented, and mathematical models are built for all three conditions. The nature-inspired algorithm is the best way to get the optimal value. For the discussed problem in the paper, nature-inspired techniques are used for obtaining the optimum parameter values to get minimum surface roughness for all set conditions. The Grasshopper optimization algorithm (GOA) is the technique that is the most effective method for real-life applications. In this research, GOA is used to get optimum values for the surface roughness (Ra) at Dry, Wet and cryogenic conditions. Finally, results are compared, and it's observed that the values obtained from GOA are minimum in surface roughness value.","PeriodicalId":162270,"journal":{"name":"Journal of Mechanical Engineering, Automation and Control Systems","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127806640","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}

引用次数: 2

Vibration characteristics analysis and structural improvement of natural gas venting ignition pipeline 天然气排气点火管道振动特性分析及结构改进

Journal of Mechanical Engineering, Automation and Control Systems Pub Date : 2021-10-12 DOI: 10.21595/jmeacs.2021.22185

Yong Chen, Jinjin Tan, Shuxia Tian

{"title":"Vibration characteristics analysis and structural improvement of natural gas venting ignition pipeline","authors":"Yong Chen, Jinjin Tan, Shuxia Tian","doi":"10.21595/jmeacs.2021.22185","DOIUrl":"https://doi.org/10.21595/jmeacs.2021.22185","url":null,"abstract":". In order to study the flow-induced vibration characteristics of the natural gas vent pipeline under the internal flow field, taking the gas transmission station pipeline as an example, the ANSYS Workbench software was used to establish models under two working conditions, uncoupling and fluid-solid coupling, for modal analysis, and analyze and compare the calculation results and propose a structural improvement plan. The results show that the maximum amplitude of the first three modes under the two working conditions is concentrated on the riser mouth, and the amplitude under the fluid-solid coupling condition is slightly larger than that of no coupling; the inner diameter of the pipe elbow is large and the pressure is small, and the outside diameter is small and the pressure is small. Large, this instability will increase the air pulsation of the flow field. In the improved scheme, adding a restriction on the top to increase the rigidity of the pipeline can significantly reduce the maximum amplitude of the gas pipeline; adding an orifice to eliminate air flow pulsation has a certain effect on reducing the maximum amplitude and natural frequency, and the combination of the two can make the pipeline more stable. The research results of this paper can provide improved ideas for vibration reduction at the natural gas venting operation site.","PeriodicalId":162270,"journal":{"name":"Journal of Mechanical Engineering, Automation and Control Systems","volume":"101 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124090178","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}

引用次数: 0

Four-dimensional trajectory optimization model with priority in continuous time period 连续时间段内优先级四维轨迹优化模型

Journal of Mechanical Engineering, Automation and Control Systems Pub Date : 2021-08-06 DOI: 10.21595/jmeacs.2021.22056

Jianyu Chu, Mengke Li, Yinfeng Li, Xian‐De Wu

{"title":"Four-dimensional trajectory optimization model with priority in continuous time period","authors":"Jianyu Chu, Mengke Li, Yinfeng Li, Xian‐De Wu","doi":"10.21595/jmeacs.2021.22056","DOIUrl":"https://doi.org/10.21595/jmeacs.2021.22056","url":null,"abstract":"This article aims to mitigate the imbalance of capacity and flow in airspace. Targeting to minimize the total delay time, taking the real-life sector operation and aircraft flight rules into consideration, with constraints of sector capacity limit and minimal time interval, the principle to prioritize aircraft when the delay occurred was raised. A trajectory planning model with the priority of aircraft was then established in the model of trajectory based on operation in a continuous period. The traditional genetic algorithm was also improved through the strategy of enhanced elitism preserving and double-stranded chromosome structure. Case studies indicated that the proposed trajectory planning model and solution algorithm have contributed to, over the two periods, an average reduction of 71.77 % in the delay time on optimization effect, and an increase of 19.48 % in the calculation speed. In this case, the model appears to, in a relatively short time, provide a trajectory allocation strategy with security and timeliness, for aircraft operated in consecutive periods. As a result, the sectors can operate without any conflicts while effectively reducing flight delays, minimizing the traffic congestion and potential accidents, so as to take the most advantages of sector resources allocation.","PeriodicalId":162270,"journal":{"name":"Journal of Mechanical Engineering, Automation and Control Systems","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115817815","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}

引用次数: 0

Crack classification in rotor-bearing system by means of wavelet transform and deep learning methods: an experimental investigation 基于小波变换和深度学习方法的转子轴承系统裂纹分类实验研究

Journal of Mechanical Engineering, Automation and Control Systems Pub Date : 2020-12-11 DOI: 10.21595/jmeacs.2020.21799

Rezazadeh Nima, Fallahy Shila

{"title":"Crack classification in rotor-bearing system by means of wavelet transform and deep learning methods: an experimental investigation","authors":"Rezazadeh Nima, Fallahy Shila","doi":"10.21595/jmeacs.2020.21799","DOIUrl":"https://doi.org/10.21595/jmeacs.2020.21799","url":null,"abstract":"Parallel with significant growth in industry, especially mysteries related to energy engineering, condition monitoring of rotating systems have been experiencing a noticeable increase. One of the prevalent faults in these systems is fatigue crack, so finding reliable procedures in identification of cracks in rotating shafts has become a pressing problem among engineers during recent decades. While a vast majority of cracked rotors can operate for a specific period of time, to prevent catastrophic failures, crack detection and measuring its characteristics (i.e. size and its location) seem to be essential. In the present essay, a hybrid procedure, consisting of Deep Learning and Discrete Wavelet transform (DWT), is applied in detection of a breathing transverse crack and its depth in a rotor-bearing-disk system. DWT with Daubechies 32(db32) as wavelet mother function is applied in signal noise reduction until level 6, also its Relative Wavelet Energy (RWE) and Wavelet entropy (WE) are extracted. A characteristic vector that is a combination of RWE and WE is considered as input to a multi-layer Artificial Neural Network (ANN). In this supervised learning classifier, a multi-layer Perceptron neural network is used; in addition, Rectified Linear Unit (ReLU) function is exerted as activation function in both hidden and output layers. By comparing the results, it can be seen that the applied procedure has strong capacity in identification of crack and its size in the rotor system.","PeriodicalId":162270,"journal":{"name":"Journal of Mechanical Engineering, Automation and Control Systems","volume":"115 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132564485","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}

引用次数: 8

Control performance of suspension system of cars with PID control based on 3D dynamic model 基于三维动力学模型的汽车悬架系统PID控制性能研究

Journal of Mechanical Engineering, Automation and Control Systems Pub Date : 2020-06-30 DOI: 10.21595/jmeacs.2020.21363

M. Tian, V. Nguyen

引用次数: 6