Weighted Margin Sparse Embedded classifier for brake cylinder detection

2013 ◽  
Vol 120 ◽  
pp. 560-568 ◽  
Author(s):  
Yao Cao ◽  
Baochang Zhang ◽  
Jianzhuang Liu ◽  
Jiangsha Ma
Keyword(s):  
Brake Cylinder ◽  
Cylinder Detection

scholarly journals PERANCANGAN ALAT BANTU PEMINDAHAN BRAKE CYLINDER DI DEPARTEMEN SARANA KERETA API PT. PINDAD (PERSERO)

INFOMATEK ◽  
2020 ◽  
Vol 22 (1) ◽  
pp. 1-14
Keyword(s):  
H Beam ◽  
Brake Cylinder

PT. PINDAD (PERSERO) merupakan Badan Usaha Milik Negara yang memproduksi alat utama sistem persenjataan TNI dan peralatan industri. Departemen Sarana Kereta Api merupakan bagian PT. PINDAD (PERSERO) yang mendukung produksi internal, memenuhi permintaan pasar lokal/ekspor sistem pengereman kereta api.Terdapat satu komponen yang pengerjaan perakitan, pengujian tidak sesuai SOP yaitu Brake Cylinder. Target waktu tidak tercapai pada kegiatan transportasi saat operator mengambil material dari mesin rakit yang dibawa ke mesin pengujian, dan membawa material dari mesin pengujian ke penyimpanan dengan selisih waktu 9 menit. Ini disebabkan oleh faktor manusia, operator mengalami kelelahan fisik karena belum tersedia alat bantu. Nilai LI≥3, aktivitas menimbulkan cedera tulang belakang. Masalah diatasi dengan merancang alat bantu pemindahan Brake Cylinder. Metode yang digunakan yaitu metode rasional. Desain disesuaikan dengan dimensi meja uji, rakit, dan dimensi produk lain. Anthropometri dan persentil yang digunakan yaitu tebal telapak tangan genggam (50%) dan tinggi siku berdiri (50%). Katrol untuk mengangkat produk (mannual chain block), meja penahan sebagai penyangga (besi plat hitam), roda untuk memindahkan alat (Duty Polyurethane), rangka atas (besi baja H Beam), rangka samping (besi kotak), engsel (rel sliding). Biaya untuk membuat 1 unit alat bantu ini sebesar Rp 8.264.000,-.

scholarly journals Modelling of Friction Coefficient for Shoes Type LL By Means of Polynomial Fitting

2018 ◽  
Vol 12 (1) ◽  
pp. 114-127 ◽  
Author(s):  
L. Cantone ◽  
A. Ottati
Keyword(s):  
Experimental Data ◽  
Friction Coefficient ◽  
Input Data ◽  
Normal Force ◽  
Loading Conditions ◽  
Polynomial Fitting ◽  
Maximum Acceleration ◽  
Stopping Distance ◽  
Freight Traffic ◽  
Brake Cylinder

Introduction: The paper describes the automatic procedure, implemented in UIC software TrainDy, for the simulation of friction coefficient of new LL shoes, used to avoid noise from freight traffic. Method: This procedure uses certified experimental data obtained at dynamometer bench as input data and computes a series of polynomials laws that describe the evolution of friction coefficient with speed, for different values of normal force between brake blocks and wheel and for different initial braking speeds. Result: Numerical results are compared against two series of experimental slip tests, carried on Trenitalia freight wagons, in terms of both stopping distances (for different starting speeds and loading conditions) and pressure in brake cylinder, speed and acceleration. Errors in terms of stopping distance are always below 5% whereas errors in terms of maximum acceleration are up to 20%.

Effects of Slow-Acting Brakes Application Time Regulated Limits on Freight In-Train Forces

2015 ◽  
Vol 809-810 ◽  
pp. 1133-1138
Author(s):  
Cătălin Cruceanu ◽  
Camil Ion Crăciun
Keyword(s):  
Numerical Simulations ◽  
Air Pressure ◽  
Application Time ◽  
Pressure Data ◽  
Longitudinal Dynamics ◽  
Filling Time ◽  
Tensile Forces ◽  
Filling Characteristics ◽  
Brake Cylinder

The paper originally investigates the influence of the admitted ranges of slow-acting filling time of brake cylinder on longitudinal dynamics of freight trains, using experimental air pressure data obtained in tests on filling characteristics. Mechanical and pneumatic models are summarized and numerical simulations were performed for a train composed of six wagon train, in different filling characteristics configurations. The results reflect significant effects on in-train forces values, while evolution and disposition of compression and tensile forces between neighbored vehicles in the long of the train are also affected.

scholarly journals The effects of filling characteristics on the longitudinal forces developed in the braking train

2019 ◽  
Vol 290 ◽  
pp. 08005
Author(s):  
Camil Ion Crăciun ◽  
Cătălin Cruceanu
Keyword(s):  
Compressed Air ◽  
Railway Vehicle ◽  
Inertial Forces ◽  
Longitudinal Dynamic ◽  
Dynamic Forces ◽  
Filling Characteristics ◽  
Brake Cylinder ◽  
Global Research

Determination of longitudinal dynamic forces, size assessment as well as their distribution in the train body is, and will be a subject of global research. As observed from the beginning of the evolution of the railway vehicle and the train itself, the main reason for the occurrence of longitudinal dynamic forces is represented by the differences in inertial forces between the consecutive train vehicles. These inertial forces are influenced by the braking forces developed on each vehicle. The brake with which a railway vehicle is equipped is the pneumatic brake with compressed air. It evacuates the air from the train’s general pipeline, increasing the pressure in the brake cylinders of each vehicle. The brake command and cylinder filling is more delayed on long trains compared to short ones. Thus, the brake can operate in two ways, the fast-action brake and the slow-action brake. In this paper, we aim to highlight the influence of the brake type by the brake cylinder filling characteristic of the dynamic longitudinal reactions. It will be analysed on a simplified train model the magnitude and distribution of longitudinal dynamic forces obtained using both braking systems.

Fault detection of EMU brake cylinder

2016 ◽  
Author(s):  
Hongquan Ji ◽  
Xiao He ◽  
Huasong Sai ◽  
Xiuhua Tai ◽  
Donghua Zhou
Keyword(s):  
Fault Detection ◽  
Brake Cylinder
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