吳振順控制工程基礎(chǔ)王積偉_第二版_課后習題解答-資料下載頁
2025-03-24 23:42本頁面
【正文】 加；相位超前，系統(tǒng)的相位裕量也增加，提高了系統(tǒng)的穩(wěn)定性；但對抗高頻干擾的能力下降。56解:（1）確定開環(huán)增益： Kv＝K≥7，取K＝7 開環(huán)頻率特性 對數(shù)幅頻特性 相頻特性 并畫出未校正開環(huán)系統(tǒng)的博德圖。（2）計算未校正系統(tǒng)的幅值穿越頻率和相位裕量令L（wc）＝0，得到得到幅值穿越頻率為：相位裕量為：不能滿足性能要求，考慮到系統(tǒng)對穩(wěn)態(tài)精度有要求，而對響應(yīng)快速性沒具體要求，所以可選用滯后校正裝置。（3）確定校正后的幅值穿越頻率 取 則：得到校正后的幅值穿越頻率為：（4）確定滯后校正裝置的參數(shù)滯后校正裝置的頻率特性滯后校正裝置在新幅值穿越頻率處提供的幅值增益分貝： 所以： 得到：為使校正裝置的增大滯后相角遠離校正后的幅值穿越頻率，可選校正裝置的一個轉(zhuǎn)折頻率為： 得到T2＝校正裝置的傳遞函數(shù)為：（5）驗算校正后的幅值裕量和相位裕量校正后的開環(huán)傳遞函數(shù)求相位裕量：求幅值裕量： 解得：滿足設(shè)計要求。 People39。s Daily life cannot leave the energy everywhere,not only the clothing,eating,living,walking,but also culture,entertainment，medical and health care all are closely related with the improvement of living standard,the more energy is world demand for energy and natural resources drying up have proposed the new challenge for energy suppliers, industrial enterprises and far as possible to use energy with efficient and sustainable ways has became a top efficiency have an impact on all types of energy conversion：from electricity and heat energy efficient generation,transmission and distribution to the industrial,building and traffic’s efficient use of energy,everything the concept of sustainable development is being more and more thorough popular feeling, and conventional energy sources,such as coal bustion directly brought about by the negative effects such as air pollution, acid rain and greenhouse effect, energy is being the focus of attention and research increasingly. This paper analyzes the current conventional energy utilization and its status in the future，further lead to the development of new energy and its future the mid 21st century，primary energy will still with natural gas, oil, coal as main energy，and nuclear power, wind power, hydropower, new energy sources such as solar energy, hydrogen fuel will get great development and work as auxiliary energy. Keywords：current situation of energy，The prospect of new energy，The use of new energy,The use of new energy.
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