摘要
基于改进的Levenberg-Marquardt算法,对燃气轮机部件精确特性获取中的特性曲线拟合问题进行了研究,引入一种新的阻尼因子λ迭代方法,使改进的Levenberg-Marquardt算法能很快接近最优解,并能跳出局部最优的陷阱,在保证解质量的同时提高了收敛速度。建立了燃气轮机特性拟合数学模型,并应用改进Levenberg-Marquardt算法获取燃气轮机部件的特性方程。实例计算结果表明:较普通Levenberg-Marquardt而言,改进的Levenberg-Marquardt算法拟合效果更好。
New methods of curve fitting for obtaining the precise performance of the gas turbine were given based on an improved Levenberg-Marquardt method. A new damper factor was applied to itera- tion to make the improved Levenberg-Marquardt algorithm up to the optimal solution quickly and a- way from the trap of locally optimal solution. It could insure the solution quality and improve the con- vergence speed. The fitting model was established and the algorithm was used to acquire the precise performance. The results show that the fitting method of the improved Levenberg-Marquardt-based performance is more effective.
出处
《海军工程大学学报》
CAS
北大核心
2012年第4期35-40,共6页
Journal of Naval University of Engineering
基金
国家部委基金资助项目(40101020102)
