基于高性能微控制器的超低速稀土永磁交流伺服系统

A Specially Designed A.C. Servo System for Maintaining Accurately and Reliably the Position of Rotating Antenna

阐述了以软件伺服为控制策略的基于高性能微控制器的新型全数字高精度超低速稀土永磁交流伺服系统的工作原理、设计特点、系统构成和功能实现。研制成功的伺服系统实测结果表明系统具有很高的精度 (0 .0 5°)和优越的超低速 (1 .2°/ min)

We contracted to design an A.C. servo sytem for accurately and reliably keeping a rotating antenna pointed to a moving target; it should be capable of controlling the antenna to rotate as slowly as 1.2°/min and should be able to control the pointing direction of the antenna to be within 0.05° of the terget. It required considerable effort on our part to meet these requirements that were regarded very stringent in P.R.China. Fig.1 shows the schematic diagram of the A.C. servo system we designed. The motor designed by us for our servo system is a SBLSTM (sinusoidal brushless slotless torque motor) REPM (rare earth permanent magnet) motor which contains an external rotor as shown in Fig.2. Section 2 gives the details about designing our SBLSTM motor. Most importantly, subsection 3.2 discusses in detail how to design a microcontroller system around a 80C196KC chip. Fig.4 shows the schematic diagram of our microcontroller system. Section 4 discusses the strategy of the software for our system; this software is shown schematically in Fig.5.