發(fā)布時間：2018-07-18 14:33

【摘要】：為提升被控系統(tǒng)在整個工作頻域內(nèi)的動態(tài)性能,本文提出一種時頻(time-frequency,TF)控制方法的理論框架,該框架通過應(yīng)用小波分析技術(shù)以提高傳統(tǒng)控制器性能的方式達(dá)到上述目標(biāo).在闡述了此框架下TF控制機(jī)理的基礎(chǔ)上,結(jié)合傳統(tǒng)PI控制方法設(shè)計(jì)了一種時頻PI(time-frequency PI,TFPI)控制器,并對TFPI控制器中時頻參數(shù)的設(shè)計(jì)原理進(jìn)行了分析.針對TFPI控制器中參數(shù)眾多所導(dǎo)致的整定工作量增大的問題,結(jié)合最優(yōu)控制理論中積分型性能指標(biāo)的概念,建立了以單純形優(yōu)化方法為手段的參數(shù)自動尋優(yōu)策略.最后以電磁閥控制液壓缸系統(tǒng)模型為例進(jìn)行了控制器硬件在環(huán)仿真測試.階躍響應(yīng)結(jié)果顯示,在超調(diào)量不超過1%的要求下,相對傳統(tǒng)PI控制器0.15s左右的響應(yīng)時間,TFPI控制器響應(yīng)時間可達(dá)0.06s,在不失穩(wěn)定性的情況下顯著提升系統(tǒng)的動態(tài)性能;此外,與文獻(xiàn)中其他兩種TF控制算法亦進(jìn)行了仿真比較,結(jié)果進(jìn)一步證明了該控制方法在系統(tǒng)動態(tài)性能提升方面的有效性.
[Abstract]:In order to improve the dynamic performance of the controlled system in the whole operating frequency domain, this paper presents a theoretical framework of time-frequency TF control method, which can improve the performance of traditional controller by using wavelet analysis technology. Based on the description of TF control mechanism under this framework, a time-frequency Pi (time-frequency Pi) controller is designed in combination with the traditional Pi control method, and the design principle of the time-frequency parameters of the time-frequency controller is analyzed. Aiming at the problem of increasing the setting workload caused by the numerous parameters in the TFPI controller, a parameter automatic optimization strategy based on simplex optimization is established by combining the concept of integral performance index in the optimal control theory. Finally, the controller hardware in loop simulation test is carried out by taking the solenoid valve control hydraulic cylinder system model as an example. The step response results show that the response time of TFPI controller can reach 0.06s compared with that of traditional Pi controller about 0.15 s under the requirement of less than 1% overshoot, and the dynamic performance of the system can be improved significantly without loss of stability. Compared with the other two TF control algorithms in literature, the simulation results show that the proposed control method is effective in improving the dynamic performance of the system.
【作者單位】： 中國農(nóng)業(yè)大學(xué)現(xiàn)代農(nóng)業(yè)裝備優(yōu)化設(shè)計(jì)北京市重點(diǎn)實(shí)驗(yàn)室;德克薩斯A&M大學(xué)機(jī)械工程系;
【基金】：北京市科技創(chuàng)新基地培育與發(fā)展基金專項(xiàng)(Z151100001615017)資助~~
【分類號】：TP273

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1 馮明琴;;數(shù)字PID調(diào)節(jié)參數(shù)自動尋優(yōu)[J];攀枝花學(xué)院學(xué)報;2007年06期

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本文編號：2132204