(完整word版)机械工程测试技术基础第三版熊诗波课后答案(打印版).(word文档良心出品).pdf

机械工程测试技术基础第三版熊诗波绪论0-1 叙述我国法定计量单位的基本内容。解答：教材P45，二、法定计量单位。0-2 如何保证量值的准确和一致？解答：（参考教材P46，二、法定计量单位五、量值的传递和计量器具检定）1、对计量单位做出严格的定义；2、有保存、复现和传递单位的一整套制度和设备；3、必须保存有基准计量器具，包括国家基准、副基准、工作基准等。3、必须按检定规程对计量器具实施检定或校准，将国家级准所复现的计量单位量值经过各级计算标准传递到工作计量器具。0-3 何谓测量误差？通常测量误差是如何分类表示的？解答：（教材P810，八、测量误差）0-4 请将下列诸测量结果中的绝对误差改写为相对误差。1.0182544V 7.8 V(25.04894 0.00003)g(5.482 0.026)g/cm2解答：0-5 何谓测量不确定度？国际计量局于1980 年提出的建议 实验不确定度的规定建议书 INC-1(1980)的要点是什么？解答：(1)测量不确定度是表征被测量值的真值在所处量值范围的一个估计，亦即由于测量误差的存在而对被测量值不能肯定的程度。(2)要点：见教材P11。0-6 为什么选用电表时，不但要考虑它的准确度，而且要考虑它的量程？为什么是用电表时应尽可能地在电表量程上限的三分之二以上使用？用量程为150V 的 0.5 级电压表和量程为 30V 的 1.5 级电压表分别测量25V 电压，请问哪一个测量准确度高？解答：(1)因为多数的电工仪表、热工仪表和部分无线电测量仪器是按引用误差分级的（例如，精度等级为0.2 级的电表，其引用误差为0.2%），而引用误差=绝对误差/引用值其中的引用值一般是仪表的满度值(或量程)，所以用电表测量的结果的绝对误差大小与量程有关。量程越大，引起的绝对误差越大，所以在选用电表时，不但要考虑它的准确度，而且要考虑它的量程。(2)从(1)中可知，电表测量所带来的绝对误差=精度等级 量程/100，即电表所带来的绝对误差是一定的，这样，当被测量值越大，测量结果的相对误差就越小，测量准确度就越高，所以用电表时应尽可能地在电表量程上限的三分之二以上使用。(3)150V 的 0.5 级电压表所带来的绝对误差=0.5 150/100=0.75V；30V 的 1.5 级电压表所带来的绝对误差=1.5 30/100=0.45V。所以 30V 的 1.5 级电压表测量精度高。0-7 如何表达测量结果？对某量进行8 次测量，测得值分别为：802.40，802.50，802.38，802.48，802.42，802.46，802.45，802.43。求其测量结果。解答：(1)测量结果=样本平均值 不确定度或(2)所以测量结果=802.44+0.0142680-8 用米尺逐段丈量一段10m 的距离，设丈量1m 距离的标准差为0.2mm。如何表示此项间接测量的函数式？求测此10m 距离的标准差。解答：(1)(2)0-9 直圆柱体的直径及高的相对标准差均为0.5%，求其体积的相对标准差为多少？解答：设直径的平均值为，高的平均值为，体积的平均值为，则文档编码:CL3X7G2T7T3 HK3W9I2T8B10 ZK9D8C1E8Q3文档编码:CL3X7G2T7T3 HK3W9I2T8B10 ZK9D8C1E8Q3文档编码:CL3X7G2T7T3 HK3W9I2T8B10 ZK9D8C1E8Q3文档编码:CL3X7G2T7T3 HK3W9I2T8B10 ZK9D8C1E8Q3文档编码:CL3X7G2T7T3 HK3W9I2T8B10 ZK9D8C1E8Q3文档编码:CL3X7G2T7T3 HK3W9I2T8B10 ZK9D8C1E8Q3文档编码:CL3X7G2T7T3 HK3W9I2T8B10 ZK9D8C1E8Q3文档编码:CL3X7G2T7T3 HK3W9I2T8B10 ZK9D8C1E8Q3文档编码:CL3X7G2T7T3 HK3W9I2T8B10 ZK9D8C1E8Q3文档编码:CL3X7G2T7T3 HK3W9I2T8B10 ZK9D8C1E8Q3文档编码:CL3X7G2T7T3 HK3W9I2T8B10 ZK9D8C1E8Q3文档编码:CL3X7G2T7T3 HK3W9I2T8B10 ZK9D8C1E8Q3文档编码:CL3X7G2T7T3 HK3W9I2T8B10 ZK9D8C1E8Q3文档编码:CL3X7G2T7T3 HK3W9I2T8B10 ZK9D8C1E8Q3文档编码:CL3X7G2T7T3 HK3W9I2T8B10 ZK9D8C1E8Q3文档编码:CL3X7G2T7T3 HK3W9I2T8B10 ZK9D8C1E8Q3文档编码:CL3X7G2T7T3 HK3W9I2T8B10 ZK9D8C1E8Q3文档编码:CL3X7G2T7T3 HK3W9I2T8B10 ZK9D8C1E8Q3文档编码:CL3X7G2T7T3 HK3W9I2T8B10 ZK9D8C1E8Q3文档编码:CL3X7G2T7T3 HK3W9I2T8B10 ZK9D8C1E8Q3文档编码:CL3X7G2T7T3 HK3W9I2T8B10 ZK9D8C1E8Q3文档编码:CL3X7G2T7T3 HK3W9I2T8B10 ZK9D8C1E8Q3文档编码:CL3X7G2T7T3 HK3W9I2T8B10 ZK9D8C1E8Q3文档编码:CL3X7G2T7T3 HK3W9I2T8B10 ZK9D8C1E8Q3文档编码:CL3X7G2T7T3 HK3W9I2T8B10 ZK9D8C1E8Q3文档编码:CL3X7G2T7T3 HK3W9I2T8B10 ZK9D8C1E8Q3文档编码:CL3X7G2T7T3 HK3W9I2T8B10 ZK9D8C1E8Q3文档编码:CL3X7G2T7T3 HK3W9I2T8B10 ZK9D8C1E8Q3文档编码:CL3X7G2T7T3 HK3W9I2T8B10 ZK9D8C1E8Q3文档编码:CL3X7G2T7T3 HK3W9I2T8B10 ZK9D8C1E8Q3文档编码:CL3X7G2T7T3 HK3W9I2T8B10 ZK9D8C1E8Q3文档编码:CL3X7G2T7T3 HK3W9I2T8B10 ZK9D8C1E8Q3文档编码:CL3X7G2T7T3 HK3W9I2T8B10 ZK9D8C1E8Q3文档编码:CL3X7G2T7T3 HK3W9I2T8B10 ZK9D8C1E8Q3文档编码:CL3X7G2T7T3 HK3W9I2T8B10 ZK9D8C1E8Q3文档编码:CL3X7G2T7T3 HK3W9I2T8B10 ZK9D8C1E8Q3文档编码:CL3X7G2T7T3 HK3W9I2T8B10 ZK9D8C1E8Q3文档编码:CL3X7G2T7T3 HK3W9I2T8B10 ZK9D8C1E8Q3文档编码:CL3X7G2T7T3 HK3W9I2T8B10 ZK9D8C1E8Q3文档编码:CL3X7G2T7T3 HK3W9I2T8B10 ZK9D8C1E8Q3文档编码:CL3X7G2T7T3 HK3W9I2T8B10 ZK9D8C1E8Q3文档编码:CL3X7G2T7T3 HK3W9I2T8B10 ZK9D8C1E8Q3文档编码:CL3X7G2T7T3 HK3W9I2T8B10 ZK9D8C1E8Q3文档编码:CL3X7G2T7T3 HK3W9I2T8B10 ZK9D8C1E8Q3文档编码:CL3X7G2T7T3 HK3W9I2T8B10 ZK9D8C1E8Q3文档编码:CL3X7G2T7T3 HK3W9I2T8B10 ZK9D8C1E8Q3文档编码:CL3X7G2T7T3 HK3W9I2T8B10 ZK9D8C1E8Q3文档编码:CL3X7G2T7T3 HK3W9I2T8B10 ZK9D8C1E8Q3所以第一章信号的分类与描述1-1 求周期方波（见图1-4）的傅里叶级数（复指数函数形式），划出|cn|和 n图，并与表1-1 对比。解答：在一个周期的表达式为积分区间取（-T/2，T/2）所以复指数函数形式的傅里叶级数为，。文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3没有偶次谐波。其频谱图如下图所示。1-2 求正弦信号的绝对均值和均方根值。解答：1-3 求指数函数的频谱。解答：文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V31-4 求符号函数(见图 1-25a)和单位阶跃函数(见图 1-25b)的频谱。a)符号函数的频谱t=0 处可不予定义，或规定sgn(0)=0。该信号不满足绝对可积条件，不能直接求解，但傅里叶变换存在。可以借助于双边指数衰减信号与符号函数相乘，这样便满足傅里叶变换的条件。先求此乘积信号x1(t)的频谱，然后取极限得出符号函数x(t)的频谱。文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3b)阶跃函数频谱在跳变点t=0 处函数值未定义，或规定u(0)=1/2。阶跃信号不满足绝对可积条件，但却存在傅里叶变换。由于不满足绝对可积条件，不能直接求其傅里叶变换，可采用如下方法求解。解法 1：利用符号函数结果表明，单位阶跃信号u(t)的频谱在f=0 处存在一个冲激分量，这是因为u(t)含有直流分量，在预料之中。同时，由于u(t)不是纯直流信号，在t=0 处有跳变，因此在频谱中还包含其它频率分量。文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3解法 2：利用冲激函数根据傅里叶变换的积分特性1-5 求被截断的余弦函数(见图 1-26)的傅里叶变换。解：w(t)为矩形脉冲信号所以根据频移特性和叠加性得：可见被截断余弦函数的频谱等于将矩形脉冲的频谱一分为二，各向左右移动f0，同时谱线高度减小一半。也说明，单一频率的简谐信号由于截断导致频谱变得无限宽。文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V31-6 求指数衰减信号的频谱解答：所以单边指数衰减信号的频谱密度函数为根据频移特性和叠加性得：文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6M8Q4T2V3文档编码:CM8J8O9J8K3 HT7H8Y5U6F1 ZP6