关键词: 数控机床；误差补偿；隐马尔科夫, 预测

Abstract:

The paper contraposed tangent method principle of aspheric CNC machining speed interpolation, an error predictive compensation method was proposed, that was based on the HMM theory, combining threshold constraint technology and expectation evaluation ideas of statistics. According to the method,the paper established “aspheric CNC machining by tangent method” error compensation model. Through the practical applications and the experimental analysis the error predictive compensation method can solve the error's problem of CNC machining effectively, the method can be applied to interpolation principle of the control system, and applied other interpolation principles. The error predictive  compensation method proposed is a new attempt in the field of error compensation research, in the long run, it will have good prospects for development and a more broad space for applications.

Key words: CNC machine;error compensation;hidden , Markov model(HMM);predictive