Comparing with the digital control system , the current existing analog control system has much of flaws , such as bad control precision and a small dynamic range etc . and it cannot match good precision req uest for the control of seismic simulation shaking table . for digital control system , if a good control algorithm can be implemented , the control problem can be solved effectively 但對現(xiàn)有的模擬控制系統(tǒng)來說由于其存在控制精度差、動態(tài)范圍小等缺點,對精度要求比較高的地震模擬來說,己不能滿足要求,而數(shù)字控制系統(tǒng)只要選擇合適的控制算法,就能有效的解決這些問題。
Finally , the principle of phase - locked - loop for speed control is discussed . the control methods of torque and magnetic levitation force are studied experimentally on a prototype bearingless motor . based on the analysis of shortcomings of the analog control system , a digital control system is proposed 分析了采用鎖相環(huán)對電機轉(zhuǎn)速進行閉環(huán)控制的原理;設(shè)計了磁懸浮力的模擬控制器并對磁懸浮血泵電機進行了實驗研究;針對模擬控制系統(tǒng)存在的缺點,本文設(shè)計了一種數(shù)字控制系統(tǒng)。
In this part , the design and theory of the main loop , the controller , the inspection and measurement of current and the circuit of orientation of rotor position in the analog control system are presented in detail . the theory of load experiment device and the experiment result are introduced as well 詳細論述了模擬控制系統(tǒng)硬件結(jié)構(gòu)的主回路、控制器、電流檢測電路以及轉(zhuǎn)子位置檢測電路的設(shè)計及工作原理,并且給出自行設(shè)計的負(fù)載實驗裝置實驗原理及實驗結(jié)果。