In this book new results on controller design techniques for the tracking of generic reference inputs are presented. They allow the design of a controller for an uncertain process, either continuous or discrete-time, ...In this book new results on controller design techniques for the tracking of generic reference inputs are presented. They allow the design of a controller for an uncertain process, either continuous or discrete-time, without zeros, and with measurable state. The controller guarantees that the control system is Type 1 and has the desired constant gain and poles or that the control system tracks, with a specified maximum error and with a specified maximum time constant, a generic reference with bounded derivative (variation in the discrete-time case), also in the presence of a generic disturbance with bounded derivative (variation). In addition, it is considered the case in which the reference is known a priori. The utility and the efficiency of the proposed methods are illustrated with attractive and significant examples of motion control and temperature control. This book is useful for the design of control systems, especially for manufacturing systems, that are versatile, fast, precise and robust.展开更多
SMC （sliding mode control） has been widely employed to compensate for the system uncertainty and disturbance. However, the chattering problem, caused by the discontinuous characteristic of switching function used in...SMC （sliding mode control） has been widely employed to compensate for the system uncertainty and disturbance. However, the chattering problem, caused by the discontinuous characteristic of switching function used in traditional SMC, greatly deteriorates the performance of SMC and has become the main limitation for its applications. Also, implementing the SMC in digital systems could make it even worse due to the limited sampling time. Moreover, as a state tracking control scheme, traditional SMC cannot be employed in the applications where the system states are not available. To alleviate these problems, the paper presents the development of a novel control method, so called ＂the output tracking integrated discrete PID （proportional-integral-derivative）-based SMC＂ for the S1SO （single-input-single-output） system, along with the controller design approaches （i.e., the traditional SMC design approach and the model reference approach）. Without the need of system states, this novel method allows for eliminating chattering problem and the steady state error that may exists in such control methods as the continuous PID-based SMC. In order to demonstrate the effectiveness of the developed method, experiments were carried out on a commercially available piezoelectric actuator with varying sampling times, as compared to the continuous P1D-based SMC. The results illustrate that the tracking performance with the proposed method is much better than the continuous PID-based SMC.展开更多
Based on the asymptotic spectral distribution of Wigner matrices, a new normality test method is proposed via reforming the white noise sequence. In this work, the asymptotic cumulative distribution function （CDF） o...Based on the asymptotic spectral distribution of Wigner matrices, a new normality test method is proposed via reforming the white noise sequence. In this work, the asymptotic cumulative distribution function （CDF） of eigenvalues of the Wigner matrix is deduced. A numerical Kullback-Leibler divergence of the empiric-d spectral CDF based on test samples from the deduced asymptotic CDF is established, which is treated as the test statistic. For validating the superiority of our proposed normality test, we apply the method to weak SIPSK signal detection in the single-input single-output （SISO） system and the single-input multiple-output （SIMO） system. By comparing with other common normality tests and the existing signal detection methods, simulation results show that the proposed method is superior and robust.展开更多
Research work for some time now has shown that fading wireless channels present enormous advantages if properly exploited through a Multiple-Input Multiple-Output (MIMO) communication model. In this paper, we demonstr...Research work for some time now has shown that fading wireless channels present enormous advantages if properly exploited through a Multiple-Input Multiple-Output (MIMO) communication model. In this paper, we demonstrate the advantages of implementing the MIMO communication model by investigating three communication techniques, namely, Single-Input Single-Output (SISO), Multiple-Input Single-Output (MISO) and MIMO for WiMAX communication systems. The performances of these communication techniques are analyzed and compared for three scenarios - rural environment, TGV (high-speed train) environment and urban environment by using the models to investigate several communication parameters.展开更多
文摘In this book new results on controller design techniques for the tracking of generic reference inputs are presented. They allow the design of a controller for an uncertain process, either continuous or discrete-time, without zeros, and with measurable state. The controller guarantees that the control system is Type 1 and has the desired constant gain and poles or that the control system tracks, with a specified maximum error and with a specified maximum time constant, a generic reference with bounded derivative (variation in the discrete-time case), also in the presence of a generic disturbance with bounded derivative (variation). In addition, it is considered the case in which the reference is known a priori. The utility and the efficiency of the proposed methods are illustrated with attractive and significant examples of motion control and temperature control. This book is useful for the design of control systems, especially for manufacturing systems, that are versatile, fast, precise and robust.
文摘SMC （sliding mode control） has been widely employed to compensate for the system uncertainty and disturbance. However, the chattering problem, caused by the discontinuous characteristic of switching function used in traditional SMC, greatly deteriorates the performance of SMC and has become the main limitation for its applications. Also, implementing the SMC in digital systems could make it even worse due to the limited sampling time. Moreover, as a state tracking control scheme, traditional SMC cannot be employed in the applications where the system states are not available. To alleviate these problems, the paper presents the development of a novel control method, so called ＂the output tracking integrated discrete PID （proportional-integral-derivative）-based SMC＂ for the S1SO （single-input-single-output） system, along with the controller design approaches （i.e., the traditional SMC design approach and the model reference approach）. Without the need of system states, this novel method allows for eliminating chattering problem and the steady state error that may exists in such control methods as the continuous PID-based SMC. In order to demonstrate the effectiveness of the developed method, experiments were carried out on a commercially available piezoelectric actuator with varying sampling times, as compared to the continuous P1D-based SMC. The results illustrate that the tracking performance with the proposed method is much better than the continuous PID-based SMC.
基金Supported by the National Natural Science Foundation of China under Grant No 61371170the Fundamental Research Funds for the Central Universities under Grant Nos NP2015404 and NS2016038+1 种基金the Aeronautical Science Foundation of China under Grant No 20152052028the Funding of Jiangsu Innovation Program for Graduate Education under Grant No KYLX15_0282
文摘Based on the asymptotic spectral distribution of Wigner matrices, a new normality test method is proposed via reforming the white noise sequence. In this work, the asymptotic cumulative distribution function （CDF） of eigenvalues of the Wigner matrix is deduced. A numerical Kullback-Leibler divergence of the empiric-d spectral CDF based on test samples from the deduced asymptotic CDF is established, which is treated as the test statistic. For validating the superiority of our proposed normality test, we apply the method to weak SIPSK signal detection in the single-input single-output （SISO） system and the single-input multiple-output （SIMO） system. By comparing with other common normality tests and the existing signal detection methods, simulation results show that the proposed method is superior and robust.
文摘Research work for some time now has shown that fading wireless channels present enormous advantages if properly exploited through a Multiple-Input Multiple-Output (MIMO) communication model. In this paper, we demonstrate the advantages of implementing the MIMO communication model by investigating three communication techniques, namely, Single-Input Single-Output (SISO), Multiple-Input Single-Output (MISO) and MIMO for WiMAX communication systems. The performances of these communication techniques are analyzed and compared for three scenarios - rural environment, TGV (high-speed train) environment and urban environment by using the models to investigate several communication parameters.
