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迟后校正的另一种用法:保持中频段基本不变,抬高低频段例3:某单位反馈系统的开环传递函数为01.060.53()(1)(2)(1)(1)2Gsssssss要求:1)5vKK;2)中频段形状基本不变,以保持系统动态特性基本不变。确定()cGs?解:依题作)(0L曲线,利用迟后网络特性,使低频段抬高sse00562.010053.0053.0lg205.195.19434.9lg20lg20434.953.05205.1911dBKKcc01.060.53()(1)(2)(1)(1)2Gsssssss确定:5(1)9.434(18.8681)0.530.053()(177.9361)(1)0.00562cssGsss0005(18.8681)()().()(1)(0.51)(177.9361)0.530.5318090arctan0.53arctan21809027.914.847.3arctan(18.8680.53)arctan(177.9360.53)47.384.2989.3942.2ccsGsGsGsssss校正前后系统性能的比较:σ%tsess[r(t)=t]校正前系统30%16.981.887校正后系统35%19.810.2
本文标题:迟后校正03
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