本文選題：海洋平臺 + 跟蹤　； 參考：《中國計量學院》2014年碩士論文

【摘要】：本文研究了海洋平臺主動減振系統(tǒng)在不規(guī)則波浪力作用下的前饋反饋最優(yōu)跟蹤控制方法,以及含記憶的前饋反饋最優(yōu)跟蹤控制方法,并進一步討論了離散前饋反饋最優(yōu)跟蹤控制方法.具體內(nèi)容如下： 第一,研究了海洋平臺主動減振系統(tǒng)在不規(guī)則波浪力作用下的前饋反饋最優(yōu)跟蹤控制方法.通過引入漸近穩(wěn)定的期望系統(tǒng),基于波浪力線性外系統(tǒng)近似模型,給出了海洋平臺系統(tǒng)基于二次型性能指標泛函的前饋反饋最優(yōu)跟蹤控制器設(shè)計方法及其控制器的存在唯一性條件.控制器的前饋增益矩陣和反饋增益矩陣可分別經(jīng)由求解代數(shù)Riccati方程和Sylvester方程得到.仿真算例表明了方法的有效性,且在減小平臺的振動幅值和控制力方面,前饋反饋最優(yōu)跟蹤控制方法優(yōu)于反饋最優(yōu)跟蹤控制方法. 第二,研究了海洋平臺在不規(guī)則波浪力下含控制時滯的海洋平臺系統(tǒng)前饋反饋最優(yōu)跟蹤控制方法.首先,通過引入狀態(tài)變換,將含控制時滯的海洋平臺系統(tǒng)轉(zhuǎn)化為無時滯系統(tǒng).其次,得到了含記憶的前饋反饋最優(yōu)控制器存在的唯一性條件,控制器可以通過求解代數(shù)Riccati方程和Sylvester方程得到.通過仿真結(jié)果可知,本方法在抑制海洋平臺的振動方面和控制力方面比前饋反饋最優(yōu)控制方法更優(yōu). 第三,研究了海洋平臺在不規(guī)則波浪力下的離散前饋反饋最優(yōu)跟蹤控制方法.離散前饋反饋最優(yōu)跟蹤控制方法的提出是為了減小波浪對海洋平臺的振動影響.考慮到平臺系統(tǒng)有延遲輸入,提出了含記憶的海洋平臺離散前饋反饋最優(yōu)跟蹤控制方法.控制器可以分別通過求解代數(shù)Riccati方程和Stein方程.通過仿真結(jié)果可知,本方法在抑制海洋平臺的振動方面比傳統(tǒng)的反饋最優(yōu)跟蹤控制方法更優(yōu).同時,本方法與前饋反饋最優(yōu)控制方法相比需要更小的控制力.
[Abstract]:In this paper, the feedforward and feedback optimal tracking control method for active damping system of offshore platform under the action of irregular wave force and the feedforward feedback optimal tracking control method with memory are studied.The discrete feedforward feedback optimal tracking control method is further discussed.The details are as follows:First, the feedforward and feedback optimal tracking control method for active damping system of offshore platform under irregular wave force is studied.By introducing an asymptotically stable desired system, an approximate model of the wave force linear external system is proposed.The design method of feedforward feedback optimal tracking controller for offshore platform system based on quadratic performance index functional and the existence and uniqueness conditions of the controller are presented.The feedforward gain matrix and feedback gain matrix of the controller can be obtained by solving the algebraic Riccati equation and the Sylvester equation respectively.The simulation results show that the method is effective and the feedforward and feedback optimal tracking control method is superior to the feedback optimal tracking control method in reducing the vibration amplitude and control force of the platform.Secondly, the feedforward and feedback optimal tracking control method for offshore platform systems with control delay under irregular wave force is studied.Firstly, by introducing the state transformation, the offshore platform system with control delay is transformed into a delayless system.Secondly, the uniqueness condition for the existence of feedforward and feedback optimal controller with memory is obtained. The controller can be obtained by solving algebraic Riccati equation and Sylvester equation.The simulation results show that the proposed method is better than the feedforward and feedback optimal control method in suppressing the vibration and controlling force of the offshore platform.Thirdly, the discrete feedforward feedback optimal tracking control method for offshore platforms under irregular wave forces is studied.The discrete feedforward feedback optimal tracking control method is proposed to reduce the influence of waves on the vibration of offshore platforms.Considering that the platform system has delayed input, a discrete feedforward feedback optimal tracking control method for offshore platform with memory is proposed.The controller can solve the algebraic Riccati equation and Stein equation respectively.The simulation results show that the proposed method is better than the traditional feedback optimal tracking control method in suppressing the vibration of offshore platform.At the same time, this method needs less control force than the feedforward and feedback optimal control method.
【學位授予單位】：中國計量學院
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：P752;TP273

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本文編號：1731783