time varying feedback 中文意思是什麼
time varying feedback
解釋
時變反饋-
At the same time, considering slow - varying character of fire signal, feedback cybernetic thought and holding time of fire signal is introduced into fire detecting three - layer structure realizing method in this paper. thus better reaches the aim of early warning and reducing mis - warning
同時又考慮了火災信號的漸變特性，將控制論的反饋思想和火災信號持續時間也引入到火災探測演算法上，更好地達到了提早報警和降低誤報警的目的。 -
The conventional variable structure control technique for uncertain system requires that the uncertainty bound is known as a premise to assure robustness. the requirement creates an over - conservative controller and enlarges chattering. the proposed controller regards the influence of unknown disturbances and parameter uncertainties as an equivalent disturbance and generates an on - line estimation used in smc to cancel the slowly varying uncertainties by the mechanism of time delay. the reaching law approach is used to get the conditions and band of quasi - sliding mode. the new methodology offers a robust feedback control with much lower gains and reduces chattering without a prior knowledge of the uncertainty bounds or matched conditions
常規變結構控制用於不確定系統，須利用不確定性界確保系統的魯棒性，控制器過于保守且抖振變大.本文把未知干擾和參數不確定性的影響等效為名義系統的外界干擾，利用時延技術對干擾進行在線估計，並將估計值引入到變結構控制中，從而抵消掉系統中的慢變不確定性，利用離散趨近律法，推出了準滑動模態的存在條件及其帶寬.該方法克服了以往控制方法中須已知不確定性界的限制，且不必滿足匹配條件，用較低的控制增益保證了系統的魯棒性，降低了準滑動模態帶即削弱了抖振 -
Abstract : the conventional variable structure control technique for uncertain system requires that the uncertainty bound is known as a premise to assure robustness. the requirement creates an over - conservative controller and enlarges chattering. the proposed controller regards the influence of unknown disturbances and parameter uncertainties as an equivalent disturbance and generates an on - line estimation used in smc to cancel the slowly varying uncertainties by the mechanism of time delay. the reaching law approach is used to get the conditions and band of quasi - sliding mode. the new methodology offers a robust feedback control with much lower gains and reduces chattering without a prior knowledge of the uncertainty bounds or matched conditions
文摘:常規變結構控制用於不確定系統，須利用不確定性界確保系統的魯棒性，控制器過于保守且抖振變大.本文把未知干擾和參數不確定性的影響等效為名義系統的外界干擾，利用時延技術對干擾進行在線估計，並將估計值引入到變結構控制中，從而抵消掉系統中的慢變不確定性，利用離散趨近律法，推出了準滑動模態的存在條件及其帶寬.該方法克服了以往控制方法中須已知不確定性界的限制，且不必滿足匹配條件，用較低的控制增益保證了系統的魯棒性，降低了準滑動模態帶即削弱了抖振 -
Firstly, sufficient conditions of lagrange stability for nominal unperturbed pendulum - like systems are derived based on the nonlocal reduction method. then the static state feedback controller design methods are presented for uncetain pendulum - like systems with time - varying norm - bounded parameter uncertainty to obtain robust lagrange stability. it is shown that the above problem can be reduced to the existence of the solutions to a set of lmis
在具體的推導過程中，首先基於非局部降階法，推導了高階標稱類擺系統lagrange穩定的充分性條件，然後基於此條件，針對具有范數有界參數不確定性的受控高階類擺系統，給出了使其魯棒lagrange穩定的狀態反饋控制器設計的充分性條件。 -
According to wireless and mobile communication system ' s background, this thesis study on estimation of time - varying dispersive channel from four respects : ( 1 ) aid of pilots, ( 2 ) cyclic prefix ( cp ), ( 3 ) blind method, and ( 4 ) ofdm system with multiple transmitting antenna, in which the typical ways is decision - feedback algorithm and self - adaptive block algorithm
本文以無線和移動通信系統為背景，從四個方面對時變色散通道下的ofdm系統的通道估計和均衡問題進行了研究。第一是基於導頻符號的通道估計方法，第二是基於循環前綴的通道估計方法，第三是通道的盲估計方法，第四是基於多天線ofdm系統的通道估計和均衡方法的研究。 -
Comparison study between the constant modulus decision feedback equalizer ( dfe ) and several others is made on combating the frequency selective fading of uwac, and their tracking performance to time varying is also investigated
?針對水聲通道的頻率選擇性衰落，對比研究了常數模判決反饋盲均衡演算法與其它幾種盲均衡演算法的性能。針對水聲通道的時變特性，研究了該演算法的跟蹤摘要性能。 -
Using the cogent validity of backstepping " s solving parametric - strict - feedback nonlinear systems, xinghuo yu and wu yuqiang ( 1998 ) solved the output - tracking problem of a kind of linear time varying system by combining nonlinear damping method and variable structure scheme. in this dissertation, we sufficiently consider the effect of disturbances in the input channel basing on the same model
Xinghuoyu和yuqiangwu （ 1998 ）針對一類線性時變系統的輸出跟蹤問題，基於back飛tepping設計機制，將帶有非線性dallpipg項的設計方法與變結構控制方法相結合，給出了一種新的非線性控制器設計方法 -
New method of robust control of exect feedback linearizable time - varying uncertain bilinear systems
雙線性系統反饋線性化魯棒控制的新方法 -
For the networked control systems with time - varying delay, a design method of state observer and state feedback controller is proposed based on separation principle
摘要針對存在時變有界時延的網路控制系統，在一定假設條件下，基於分離原理討論了狀態觀測器和狀態反饋控制器的設計方法。 -
Stability for a class of nonlinear feedback system is studied in this paper. thus some sufficient and necessary conditions are given. these results are suitable for both time - invariant and time - varying systems. as an application, the general time - varying lur e problem is studied too. then the time - varying circle criterion in the siso case is given. at the same time, in the mimo case, a stability criterion is given, which doesn t need the decoupling conditions
-穩定性問題，給出了其穩性分析準則和一些必要條件，這些結果適用於時不變與時變系統。其次，利用已有的結果，研究了非線性環節具有扇區特性的穩定性問題。在單輸入單輸出siso的情況下，給出了時變系統的圓判據。 -
Using the optimization control method of the moderm control theories, the time - varying control and output - feedback control the authors study the variable structure active control over the rotor vibration with sma, especially the method of restraining the transient response of the rotor vibration. they get the rule of the optimum control force and the optimum control electric current and discuss the influence of variable stiffness on the total system stiffness through analyzing the structure of sma controller. they also indicate the shortcoming of the orthodox design method of a controller, especially the imbalance phenomenon caused by the lack of the rod stability, and propose a new method for improvement and items which ought to be paid attention to in the design stage
運用現代控制理論中的最優控制方法，引入時變控制和輸出反饋控制，研究利用形狀記憶合金對轉子振動進行變結構主動控制，特別是抑制轉子振動的瞬態響應的方法，得出了最優控制力和控制電流的強度變化規律；通過分析形狀記憶合金動作器的結構，探討了變剛度支承對系統總體剛度的影響，指出了傳統設計方法的不足之處，特別是由壓桿穩定性不足引起的失穩現象，並提出了改進的方法和在設計中值得注意的問題
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