本文選題：沖擊波超壓　切入點：BP神經(jīng)網(wǎng)絡(luò)　出處：《中北大學》2017年碩士論文

【摘要】：沖擊波超壓作為武器毀傷效能評估的重要參數(shù),測試數(shù)據(jù)的準確性直接影響毀傷效能評估的真實性。沖擊波超壓存儲測試儀作為戰(zhàn)斗部爆炸沖擊波信號測試儀器,其與傳感器組成的系統(tǒng)動態(tài)性能是信號準確測試的關(guān)鍵。展開沖擊波超壓存儲測試儀性能優(yōu)化設(shè)計與測試系統(tǒng)動態(tài)特性離線補償研究,對提升武器毀傷效能評估準確性具有現(xiàn)實的意義。從測試儀性能優(yōu)化設(shè)計著手,闡述信號調(diào)理電路設(shè)計要點與關(guān)鍵器件選擇方法。為提升負延時存儲空間數(shù)據(jù)存儲速率,提出一種雙級Flash存儲陣列構(gòu)成的高速存儲結(jié)構(gòu),并從硬件結(jié)構(gòu)、存儲速率分析與軟件工作流程方面詳細闡述了設(shè)計思路。除此之外還對負延時存儲空間數(shù)據(jù)存儲模式、Flash存儲陣列壞塊檢測,以及沖擊波超壓關(guān)鍵數(shù)據(jù)無線提取的實現(xiàn)原理做了詳實的分析論證。在研制的沖擊波超壓測試儀的基礎(chǔ)上,展開測試儀與傳感器構(gòu)成的測試系統(tǒng)動態(tài)特性補償研究。首先,介紹了測試系統(tǒng)動態(tài)特性描述方程、系統(tǒng)動態(tài)特性響應及相關(guān)指標。據(jù)此引出基于BP神經(jīng)網(wǎng)絡(luò)的系統(tǒng)辨識與系統(tǒng)動態(tài)特性補償原理并通過實驗仿真驗證上述方法對測試系統(tǒng)動態(tài)特性補償?shù)挠行�。然�?通過激波管產(chǎn)生的階躍壓力信號激勵測試系統(tǒng)獲取系統(tǒng)時域響應數(shù)據(jù),由系統(tǒng)輸入輸出數(shù)據(jù)對構(gòu)建的BP神經(jīng)網(wǎng)絡(luò)系統(tǒng)動態(tài)特性補償模型進行離線訓練。針對補償網(wǎng)絡(luò)訓練數(shù)據(jù)不足的問題,提出用神經(jīng)網(wǎng)絡(luò)辨識的系統(tǒng)模型在階躍信號簇激勵下產(chǎn)生大量訓練樣本的方法,提升測試系統(tǒng)動態(tài)特性補償網(wǎng)絡(luò)的泛化能力。最后,通過對比實測沖擊波數(shù)據(jù)、離線補償數(shù)據(jù)與理論計算數(shù)據(jù)之間的誤差關(guān)系驗證補償算法對測試系統(tǒng)動態(tài)特性的改善有效性。
[Abstract]:Shock wave overpressure is an important parameter of weapon damage effectiveness evaluation. The accuracy of test data directly affects the authenticity of damage effectiveness evaluation. The dynamic performance of the system composed with the sensor is the key to accurate signal measurement. The research on the performance optimization design of the shock wave overpressure storage tester and the off-line compensation of the dynamic characteristics of the test system is carried out. It is of practical significance to improve the accuracy of weapon damage effectiveness evaluation. Starting from the performance optimization design of the tester, the design points of signal conditioning circuit and the selection method of key devices are expounded. In order to improve the storage rate of negative delay storage spatial data, In this paper, a high speed storage structure based on two-stage Flash memory array is proposed, and the hardware structure is introduced. In addition, the memory rate analysis and software workflow are discussed in detail. In addition, the negative delay storage spatial data storage mode is detected by Flash memory array. And the principle of wireless extraction of critical data of shock wave overpressure is analyzed and demonstrated in detail. On the basis of the developed shock wave overpressure tester, the dynamic characteristic compensation of the testing system composed of the instrument and the sensor is studied. The dynamic characteristic description equation of the test system is introduced. The principle of system identification and system dynamic characteristic compensation based on BP neural network is introduced, and the effectiveness of the above method is verified by experimental simulation. The time domain response data of the system are obtained by the step pressure signal excitation test system generated by shock tube. The dynamic characteristic compensation model of BP neural network system is trained off-line from the input and output data of the system. This paper presents a method of generating a large number of training samples under the excitation of step signal cluster in the system model identified by neural network, which improves the generalization ability of the dynamic characteristic compensation network of the test system. Finally, by comparing the measured shock wave data, The error relationship between the off-line compensation data and the theoretical calculation data verifies the effectiveness of the compensation algorithm in improving the dynamic characteristics of the test system.
【學位授予單位】：中北大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TJ06;TP183

【參考文獻】

相關(guān)期刊論文 前10條

1 李麗萍;孔德仁;蘇建軍;;毀傷工況條件下沖擊波壓力電測法綜述[J];爆破;2015年02期

2 梁永燁;杜紅棉;裴東興;劉帆;焦耀晗;;柔性化觸發(fā)方式?jīng)_擊波測試系統(tǒng)的研究[J];科技通報;2015年02期

3 楊帆;梁永燁;杜紅棉;尤文斌;崔敏;王玉全;劉帆;焦耀晗;;毀傷威力場沖擊波無線分布式測試方法研究[J];傳感技術(shù)學報;2015年01期

4 尤文斌;馬鐵華;丁永紅;崔敏;張晉業(yè);;沖擊波測試系統(tǒng)的動態(tài)建模及應用[J];高壓物理學報;2014年04期

5 劉一江;孟立凡;張志杰;;基于遺傳算法的傳感器動態(tài)特性改善方法[J];傳感技術(shù)學報;2013年09期

6 田壯;杜紅棉;祖靜;溫濟霞;;戰(zhàn)斗部動爆沖擊波存儲測試方法研究[J];彈箭與制導學報;2013年03期

7 杜紅棉;祖靜;;無線沖擊波超壓測試系統(tǒng)研究[J];火力與指揮控制;2012年01期

8 王軍號;孟祥瑞;;一種基于改進遺傳RBF神經(jīng)網(wǎng)絡(luò)的傳感器動態(tài)特性補償算法[J];傳感技術(shù)學報;2010年09期

9 田社平,丁國清,顏德田,石猛;基于遞歸神經(jīng)網(wǎng)絡(luò)的傳感器非線性動態(tài)建模(英文)[J];測試技術(shù)學報;2004年02期

10 熊祖釗,白春華,劉長林;FAE武器爆炸狀態(tài)場壓力場測試方法研究[J];火炸藥學報;2002年01期

，

本文編號：1686833