Research On Intelligent Feedforward System Of Processing High-Order Aspheric With Tangent Method

Currently, the processing of aspheric optical parts is recognized as a difficult problem around the world. The traditional locus shaping method can leave ripple errors on the aspheric surface. The principle of tangent method processing high-order aspherical can solve these problems. According to the principle, grinding wheel moves by the tangent of the aspherical molded trajectory curve, so there will not be ripple errors. The traditional position interpolation control principle can not be used in tangent method processing high-order aspherical. This paper uses the speed interpolation control principle. Based on the Hidden Markov Model this paper designs an intelligent feedforward system to compensate the uncertain interference.By analyzing the principle of tangent method processing high-order aspherical and its mathematical model, this paper uses the speed interpolation control principle. Based on speed interpolation control principle, this paper designs3-axis linkage speed interpolation control. Electronic cam and PVT interpolation control mode are used in the3-axis linkage speed interpolation control system. The PVT interpolation control mode uses the fixed interpolation list. The system uses Hidden Markov Model to compensate the speed of the PVT interpolation list. The paper also designs hardware and software control systems.