The fault diagnosis and restoration of Parallel Type Six-axis Accelerator
LI Cheng-gang1，CHEN Jing1，YOU Jing-jing2，WANG Yan1，YAN Deng-deng1
1.College of Mechanical and Electronic Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing Jiangsu 210016;
2. College of Mechanical and Electronic Engineering, Nanjing Forestry University, Nanjing Jiangsu 210016
Abstract：By introducing an auxiliary angular velocity, the Euler dynamical differential equations were transferred from second-order nonlinear ones into first-order linear unsteady ones, and the dynamic equation were completely decoupled. Using the forward kinematics theory of parallel mechanism to explore the inherent constraint relations between system input, then establish the fault diagnosis model of the sensor and give out specific combination of fault that can be concrete can be restored. The concept of fault self-diagnosis and restoration rate were defined, on account of the low rate of fault self-diagnosis and restoration, a Parallel Type Six-axis Accelerator whose structure were improved were proposed. Based on the model of fault diagnosis, the fault judgement equation were induced, by combining with fault tree analysis, and fault could be diagnosed and the troubleshooting solutions to specific fault condition were provided. Eventually the fault self-diagnosis and restoration rate of Parallel Type Six-axis Accelerator increased by 28%. Using ADAMS software to do simulation analysis, results show that the comprehensive error was less than 6.38% after the fault branched chain was replaced. The feasibility of fault handling scheme was verified.
李成刚1，陈晶1，尤晶晶2，王艳1，颜灯灯1. 并联式六维加速度传感器故障诊断与修复[J]. 振动与冲击, 2017, 36(15): 222-229.
LI Cheng-gang1，CHEN Jing1，YOU Jing-jing2，WANG Yan1，YAN Deng-deng1. The fault diagnosis and restoration of Parallel Type Six-axis Accelerator. JOURNAL OF VIBRATION AND SHOCK, 2017, 36(15): 222-229.
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