西南师范大学学报（自然科学版）
西南師範大學學報（自然科學版）
서남사범대학학보（자연과학판）
JOURNAL OF SOUTHWEST CHINA NORMAL UNIVERSITY
2014年
5期
64-68
,共5页
空燃比%自适应粒子群优化%神经网络%预测控制%过渡工况
空燃比%自適應粒子群優化%神經網絡%預測控製%過渡工況
공연비%자괄응입자군우화%신경망락%예측공제%과도공황
air-fuel ratio%optimization of self-adaptive particle swarm%neural network%predictive control%transient operation
为解决空燃比传输延迟的问题，该文提出一种基于自适应扩展粒子群优化的空燃比预测控制策略。采用多粒子策略来提高算法的全局收敛性，通过对控制参数的自适应调整来加快算法的收敛速度。在多粒子策略中，每个粒子的更新受更多其他粒子的影响；在自适应策略中，控制参数随着迭代次数的增加而逐渐减小。以 HQ495发动机为实验对象，仿真结果表明在节气门小范围变化时，空燃比误差低于1％；在节气门大范围变化时，空燃比误差低于2％。该方法实现了对空燃比的精确预测控制，有效地改善了汽油机过渡工况排放性能。
為解決空燃比傳輸延遲的問題，該文提齣一種基于自適應擴展粒子群優化的空燃比預測控製策略。採用多粒子策略來提高算法的全跼收斂性，通過對控製參數的自適應調整來加快算法的收斂速度。在多粒子策略中，每箇粒子的更新受更多其他粒子的影響；在自適應策略中，控製參數隨著迭代次數的增加而逐漸減小。以 HQ495髮動機為實驗對象，倣真結果錶明在節氣門小範圍變化時，空燃比誤差低于1％；在節氣門大範圍變化時，空燃比誤差低于2％。該方法實現瞭對空燃比的精確預測控製，有效地改善瞭汽油機過渡工況排放性能。
위해결공연비전수연지적문제，해문제출일충기우자괄응확전입자군우화적공연비예측공제책략。채용다입자책략래제고산법적전국수렴성，통과대공제삼수적자괄응조정래가쾌산법적수렴속도。재다입자책략중，매개입자적경신수경다기타입자적영향；재자괄응책략중，공제삼수수착질대차수적증가이축점감소。이 HQ495발동궤위실험대상，방진결과표명재절기문소범위변화시，공연비오차저우1％；재절기문대범위변화시，공연비오차저우2％。해방법실현료대공연비적정학예측공제，유효지개선료기유궤과도공황배방성능。
In order to solve problem of the transmission delay of air‐fuel ratio ,an air‐predictive control strategy based on adaptive extended PSO has been proposed in this paper .The global convergence of the algorithm has been improved by adopting multi‐particle strategy ,the convergence speed of the algorithm is also accelerated through controlling the self‐adaptive adjustment of Parameter .In the multi‐particle strate‐gy ,the update of each particle is affected by the other more particles ;in the self‐adaptive strategy ,the control parameter decreases gradually with the increase of iterations .Engine of HQ495 has been chosen as the experimental object ,and the simulation results show that ,w hen the throttle changes small ,the error of air‐fuel ratio will be less than 1% ,w hile the throttle experiences a wide range of changes ,the error of air‐fuel ratio will be less than 2% .The method realizes an accurate predictive control to air‐fuel ratio and effectively improves the emissions performance of gasoline engines under transient operation .
