Control of Hydrostatic Variable Transmission

• Main Authors: Chin-Ching Huang, 黃智清
• Other Authors: 邱國慶
• Format: Others
• Language: zh-TW
• Published: 2010
• Online Access: http://ndltd.ncl.edu.tw/handle/854pnb

碩士 === 國立虎尾科技大學 === 機械與機電工程研究所 === 98 === In this research, a new hydrostatic-transmission with shift control scheme is developed. Coupled with a 2-DOF planetary gear set, a hydraulic package of a reversible variable-displacement hydraulic pump/motor and accumulator is used to replace the conventional continuously variable transmission (CVT) to optimize energy economy. With this hydrostatic system, nearly all of the energy typically lost during vehicle braking is captured and used to propel the vehicle the next time it needs to accelerate. Compare with conventional CVT system, the benefits of hydrostatic-transmission system include: better energy economy, better acceleration, less brake maintenance, and longer battery life. In this study, the prime task is to analyze the operating characteristics and performance of the hydrostatic-transmission system and derive an optimal control strategy for power shift. Then, a test bench of hydrostatic-transmission system is arranged to perform operating tests for verifying the performances of the developed systems. For optimizing energy economy and smoothing shift control, a genetic algorithm (GA) based adaptive neural sliding mode control (GANSMC) is proposed to control the hydrostatic -transmission system. The control parameters of GANSMC can be properly adjusted by using online parameters tuning algorithm derived from GA. Compare with PI controller, the experimental results show that this novel controller has good control performance, stability, and robustness.