By introducing a sensitivity parameter, the original optimal output tracking control problem is transformed into a series of two-point boundaryvalue problems without time-advance or time-delay terms.
通过引入一个灵敏度参数，将原最优输出跟踪控制问题转化为不含超前项和时滞项的一族两点边值问题。
2
By using the method of small parameter expansions the present boundary-value problem is solved. Thus the formula in the second approximation for the stress field is obtained.