連續(xù)鑄軋速度的模糊變參數(shù)PID控制

近終形連續(xù)鑄軋技術(shù)是以轉(zhuǎn)動的鑄軋輥為結(jié)晶器，直接生產(chǎn)薄帶的新技術(shù)。而鑄軋輥速度的穩(wěn)定和精度成為鑄件性能好壞的關(guān)鍵。提出了模糊變參數(shù)PID控制技術(shù)，它是由一個傳統(tǒng)的PID控制外環(huán)和一個參數(shù)調(diào)節(jié)內(nèi)環(huán)組成的一種雙環(huán)分級式結(jié)構(gòu)，能依據(jù)系統(tǒng)工況變化實(shí)時調(diào)節(jié)PID參數(shù)，克服系統(tǒng)非線性影響，使系統(tǒng)在每一工況點(diǎn)均處于相對最優(yōu)。仿真結(jié)果表明它與傳統(tǒng)的PID系統(tǒng)相比具有更好的動態(tài)品質(zhì)和系統(tǒng)的穩(wěn)定性。
關(guān)鍵詞：連續(xù)鑄軋，PID，模糊控制，變參數(shù)
Abstract: Near net thin strip continuous cast rolling is a kind of new technique that use two rotating rolls as the crystallizer and cast the liquid metal between the two rolls to produce strip directly. Fuzzy variable parameter PID controller is a dual ringwith layered structure，which consists of an out-side ring of traditional PID control and an inside ring of parameter governing．It can adjust PID parameter to make it updated accordingto working systems and overcome the effects resulting from the no 1inearity of systems ． It can make the conditions
relatively best ． It is indicated by simulation results that variable parameter PID has better dynamic behaviors and stability of system than traditional PID．
Key Words: continuous cast rolling；PID；fuzzy control；variable parameter