Refine Your Search

Topic

Author

Affiliation

Search Results

Technical Paper

Global Research and Development: GM Case Study India

2006-10-16
2006-21-0086
Global R&D is in its infant stages. Senior executives and their organizations need to develop deeper understanding of the opportunities and challenges of off-shoring R&D. While global pressure will continue to mount to deliver more value at ever lower cost, the labor cost arbitrage break in countries such as China or India will not last forever. The fundamental challenge is to use the current low-cost advantage to build rapidly a sustainable technology, product and service advantage. This requires the development of a balanced local growth strategy that is well adapted to the regional strengths while ensuring a seamless global integration of people, organizations, and processes. This paper focuses on the build-up of GM's R&D activities in India with an emphasis on research in one of the key thrust areas in GM R&D - Automotive Electronics, Controls, and Software. Lessons learned apply also to development.
Journal Article

Modeling and Simulation of Torsional Vibration of the Compliant Sprocket in Balance Chain Drive Systems

2008-06-23
2008-01-1529
The work presented in this paper outlines the development of a simulation model to aid in the design and development of a compliant sprocket for balancer drives. A design with dual-mass flywheel and a crank-mounted compliant chain sprocket greatly reduces interior noise levels due to chain meshing. However, experimental observations showed the compliant sprocket can enter into resonance and generate excessive vibration energy during startup. Special features are incorporated into the compliant sprocket design to absorb and dissipate this energy. Additional damper spring rate, high hysteresis and large motion angle that overlap the driving range may solve the problem during engine start-up period. This work develops a simulation model to help interpret the measured data and rank the effectiveness of the design alternatives. A Multibody dynamics system (MBS) model of the balancer chain drive has been developed, validated, and used to investigate the chain noise.
X