A Method for Dynamic Characterization and Response Prediction Using Ground Vibration Test(GVT)Data for Unknown Structures.

The Objective Of This Proposed Work Is To Develop A Reliable Method For Dynamic Characterization And Prediction Of Dynamic Response Of Structures Of Known/Unknown Configurations, By Processing The Free Vibration Data Generated Experimentally From The Ground Vibration Tests (GVT)Of The Prototype Vehicles. The Methodology Would Make Use Of The Measured Dynamic Data In Terms Of Mode Shapes, Natural Frequencies, Modal Damping, Point Impedances Etc.And Generate Modal (Scaled) Stiffness And Inertia Information That Will Be Used For Prediction Of Response Characteristics Of The Prototype Structure . With These Objectives, The Present Work Develops The Mathematical Formulation Of The Method, And Demonstrates Its Reliability By Performing The Experiment On A Simple Cantilever Beam To Determine Its Dynamic Characteristics. Results On Scaled Modal Stiffness And Inertia, Generated Through The Method Using Experimental (GVT) Data Show Excellent Agreement With Those Generated By FE And Analytical Models .It Must Be Noted That A Valid Benchmarking Is Performed With The Condition That The Experimental Procedure Is 'Blind' To The Actual Stiffness And Inertia Distributions As Used In FEM Or Analytical Models . Agreement Of The Predicted Response Of The Structure With That From Direct Experiment And Those From The FE And Analytical Models Indicates That This Method Will Be A Promising Tool To Predict The Dynamic And Aeroelastic Characteristics Of Any Prototype Vehicle In The Future. Once The Reliability Of The Method Is Established,It Can Be Extended To Determine The Dynamic And Aeroelastic Characteristics Of All Aircraft For Which Dynamic Characteristics Are Available From A Ground -; Vibration Test (GVT)

A SIMPLE AUTOMOTIVE APPLICATION USING FLEXRAY™ PROTOCOL

FlexRay™ protocol is emerging as the next generation automotive communication protocol which offers high data rate, deterministic, fault tolerant, flexible in-vehicle data communication. This protocol supports both time triggered and event triggered data communication. The network that uses FlexRay™ protocol is called FlexRay™ network. The need for FlexRay™ protocol is the substantial demand for the high capacity in-vehicle data communication between the electronic components. In this work, we used Infineon SoCs as FlexRay™ nodes and establish communication between multiple nodes using FlexRay™ protocol. A simple automotive application is developed with temperature and magnetic field sensor being connected to a node and the sensor data is being communicated over the FlexRay™ network

Treatment of distal tibia fractures: plating versus intramedullary nailing

Background: Distal tibia shaft fractures pose significant challenge to treating surgeons. Giving more importance to anatomical reduction and ignoring often injured soft tissues has led to poor outcomes and high complication rates. Although multiple options are described to treat these fractures, there is no consensus on the best method of treatment. We hereby want to study the results of distal tibia fractures treated by expert tibia nailing and distal tibia plating.Methods: This study was undertaken in patients who were operated in between January 2012 to March 2015 at M S Ramaiah Teaching Hospital, which is a tertiary care hospital in Bangalore. Study included 52 patients with distal tibia fracture treated by surgery. All the fractures were closed distal diaphyseal fractures without articular involvement. Thirty two patients underwent expert tibia nailing whereas 20 patients were treated with open reduction and internal fixation with locking plates. Patients were followed up at 6 weeks, 3 months, 6 months and 1 year.Results: Fifty two patients included in study and they were divided into two groups as nailing group and plating group. Plating group included 20 patients whereas nailing group included 32 patients. The mode of injury was  road traffic injury in 32 cases , followed by self-fall in 17 cases and sports related injury in 3 cases. Distal tibia fracture was associated with in 29 patients (87%) of nailing group whereas in 17 patients (80) of plating group. Average distance of fracture from pilon was 6 cm in nailing group and 3cm in plating group.  The average duration of surgery in nailing was  group  was 88 minutes (range, 65-130 minutes) whereas average duration of surgery in  plating group was group  was 92 minutes (range, 70-130 minutes).  The average time for union was 16 weeks for nailing group and for plating group it was 18 weeks.  Conclusions: Both intramedullary nailing and plating are the optimal methods of treatment. Plating is preferred in cases where fracture is close to pilon whereas intramedullary nailing is preferred for fractures away from tibial pilon. There is no significant difference between union and complication rates