填空10．当过渡过程结束时，被控变量所达到的稳态值与给定值之间的偏差，叫做_____________ 

<span style="text-decoration:underline;"><span style="font-size:16px;font-family:宋体">余差</span><span style="font-size:16px;font-family: &#39;Times New Roman&#39;,&#39;serif&#39;">&nbsp;</span></span>