摘要
在《信号与系统》课程中,确定待定常数是离散系统响应时域解法的重要步骤。如何确定零状态响应的待定常数,是用初始状态、还是用初始值?亦或二者皆可?一些《信号与系统》教材中存在分歧。尽管用初始状态计算出的待定常数与用初始值求得的结果相同,但这只是数学意义上的相符,有悖物理含义;只有采用初始值算得的待定常数,才是既遵照数学规律、又符合信号与系统物理意义的解决方法。
In a course called 'Signals and Systems',how to calculate constant is central to time domain method in discrete time system response. Is it figured out with initial value,or with initial state?Or does either do? The book does not seem to have definite answers. Although the result calculated by initial state is the same as the one by initial value, the former accords merely in the mathematical rather than physical sense. Only the method with initial value applies both mathematically and physically.
出处
《北京联合大学学报》
CAS
2005年第2期48-50,共3页
Journal of Beijing Union University
关键词
初始值
零状态响应
经典解
initial value
zero state response
time domain method
