摘要
基于MATLAB的函数库，分析比较了微分方程数值解曲线微分的不同实现手段，从而提出了一种新的数值曲线分段微分法。该方法针对由自适应调整步长积分算法得到的非等间距数值曲线设计，用于对该类曲线的进一步微分。这种方法不仅有利于保证求解精度，而且具有较高的运算速度，对于工程实际中需要对数值曲线进一步微分的数值仿真，提供了一种有效的途径。给出了汽车运行中的加速度曲线的数值仿真实例。
Based on MATLAB functions different approaches to gain numerical differential for differential equations are discussed. A new subsection differential method is presented in this paper. The method is applied especially in numerical solutions curves with non--homogeneous step, which is good to ensure so- lution precision and operating speed. It is useful and important for numerical curves obtained by means of auto--adaptive arithmetic to do differential. The example of calculating acceleration curve of the vehicle is given by using this method.
出处
《绿色科技》
2010年第6期153-156,共4页
Journal of Green Science and Technology
关键词
数值解
曲线
分段微分
numerical solution
curve
subsection differential
