In order to control the altitude of the quadrotor aircraft, an altitude control algorithm was proposed. Firstly, on the basis of analyzing the principle of quadrotor flight, a mathematical model of quadrotor was estab...
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ISBN:
(纸本)9781538635247
In order to control the altitude of the quadrotor aircraft, an altitude control algorithm was proposed. Firstly, on the basis of analyzing the principle of quadrotor flight, a mathematical model of quadrotor was established. Secondly, feedforward control link and transition process link were arranged to PID feedback controller to enhance the control performance and altitude control precision of the quadrotor aircraft. Finally, the experimental results show that this control algorithm can well control the altitude of the quadrotor aircraft.
On the basis of results of previous studies, this paper overviews several kinds of typical artificial muscles' structural principle, the technological study condition and application status in main fields, and cla...
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ISBN:
(纸本)9781424458479
On the basis of results of previous studies, this paper overviews several kinds of typical artificial muscles' structural principle, the technological study condition and application status in main fields, and classifies artificial muscles. This paper mainly summarizes domestic and foreign scholars' research results on the control technology of artificial muscles, including neural network control, H infinity control, parameter self-adaptive control, variable structure control, single neuron self-adaptive PID control, pole-placement and adaptive digital control, two-layer sliding mode' fuzzy variable structure control, fuzzy immune PD control algorithm with fixed gravity compensation and so on. Finally, it prospects the trend of research and development of artificial muscles.
Cars are becoming more and more common in today's society, and people are increasingly relying on cars when they travel daily. In developed countries, more than 50% of goods are transported by car, and passenger t...
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Cars are becoming more and more common in today's society, and people are increasingly relying on cars when they travel daily. In developed countries, more than 50% of goods are transported by car, and passenger transportation is as high as 60%. Nowadays, it is necessary to refer to the per capita car holdings to evaluate whether a country's industry is developed. Therefore, the number of cars is increasing day by day. At the same time, environmental pollution and traffic accidents caused by automobiles are becoming more and more serious. In the automotive engineering world, it is extremely urgent to solve a series of negative problems brought about by automobiles. Since the mid to late 1980s, many countries have begun to do some research on smart car systems. The smart car is a comprehensive system that integrates multiple levels of assisted driving and environmental awareness. With the progress of research, nowadays smart cars can complete the functions of roadblock recognition and security. This article is based on the research of intelligent cars, and conducts a more in-depth discussion on the control algorithms of smart cars, hoping to help the development of smart cars. (C) 2019 The Authors. Published by Elsevier Ltd.
In order to improve dynamic performance and signal tracking accuracy of electric load simulator, the influence of the moment of inertia, stiffness, friction, gaps and other factors on the system performance were analy...
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ISBN:
(数字)9781510610811
ISBN:
(纸本)9781510610811
In order to improve dynamic performance and signal tracking accuracy of electric load simulator, the influence of the moment of inertia, stiffness, friction, gaps and other factors on the system performance were analyzed on the basis of researching the working principle of load simulator in this paper. The PID controller based on Wavelet Neural Network was used to achieve the friction nonlinear compensation, while the gap inverse model was used to compensate the gap nonlinear. The compensation results were simulated by MATLAB software. It was shown that the follow-up performance of sine response curve of the system became better after compensating, the track error was significantly reduced, the accuracy was improved greatly and the system dynamic performance was improved.
This paper introduces the research significance of control algorithm for automatic train operation, gives a brief description of the basic composition and function of automatic train operation system. Introduced and a...
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ISBN:
(纸本)9781538694909
This paper introduces the research significance of control algorithm for automatic train operation, gives a brief description of the basic composition and function of automatic train operation system. Introduced and analyzed the development status of train automatic driving control algorithm and explains the advantages and disadvantages of some control algorithms. Finally, the prospect of train automatic driving control algorithm is prospected.
To improve the handling performance of a Steer-By-Wire (SBW) vehicle, a series of cornering control algorithms are proposed in this paper. Firstly, an algorithm for enhancing the maneuvering in steady-state cornering ...
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ISBN:
(纸本)9781424426928
To improve the handling performance of a Steer-By-Wire (SBW) vehicle, a series of cornering control algorithms are proposed in this paper. Firstly, an algorithm for enhancing the maneuvering in steady-state cornering is presented. Subjective evaluations are then carried based on a driving simulator to demonstrate its superiority against a conventional vehicle with a fixed steering ratio. On this basis, two categories of control algorithms for dynamically correcting and compensating the transient state cornering responses of vehicles are added on. Simulator tests again are conducted to make comprehensive investigations. Test results indicate that the control algorithms for transient state cornering could effectively improve the handling performances of a SBW vehicle, in terms of reducing the work load of drivers, enhancing the track-holding ability and improving steering response properties. Thirdly, optimization approaches on road feeling have been devised and simulated based on a modified steering effort preference function of Chinese drivers. Test results revealed have declared its validation.
A method for the synthesis of a dynamic system control algorithm based on structural synthesis of motion control systems is proposed. The technique allows, due to the separate assignment of the required movement of in...
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ISBN:
(纸本)9781728103396
A method for the synthesis of a dynamic system control algorithm based on structural synthesis of motion control systems is proposed. The technique allows, due to the separate assignment of the required movement of individual elements of the system, to extend known methods to dynamic systems, a characteristic feature of which is the impossibility of obtaining a mathematical model in the form of a single differential equation. These systems include the cascade frequency drive system. The results of applying the proposed methodology for the synthesis of an asynchronous electric drive control system are given. The synthesized system is characterized by aperiodicity of movement and provides astatic regulation with the stability of dynamic processes regardless of disturbing influences (frequency of stator voltage and drive load) in the absence of energy constraints on the control action.
As to the robot joint actuated by a pair of McKibben muscles, a CMAC neural network and PID based compound control algorithm is designed. The CMAC as a feed forward compensator realizes the reverse dynamic model of th...
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ISBN:
(纸本)9781424443475
As to the robot joint actuated by a pair of McKibben muscles, a CMAC neural network and PID based compound control algorithm is designed. The CMAC as a feed forward compensator realizes the reverse dynamic model of the robot joint. The PID controller realizes the feed back control in order to guarantee the stability of the system. The output of the compound controller is exerted to the robot joint. CMAC regulates its network weights by on line learning and forces the PID output to tend to zero, so that the total control action is generated by CMAC. Some simulations arc done and they have proved that the compound control algorithm has good tracking performance and anti-disturbance ability. And it behaves fast responding.
In this paper, a three-level neutral-point-clamped (NPC) inverter based filter capacitor supported integrated distribution static compensator (DSTATCOM) topology is proposed for load compensation using modified contro...
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ISBN:
(纸本)9781479944026
In this paper, a three-level neutral-point-clamped (NPC) inverter based filter capacitor supported integrated distribution static compensator (DSTATCOM) topology is proposed for load compensation using modified control algorithm. A three-phase four wire low voltage distribution system is taken into consideration with non-stiff source. The suggested topology is realized using three-level NPC voltage source inverter (VSI) with series capacitor to reduce dc link voltage and shunt capacitor to eliminate the high frequency switching components. In addition, a positive sequence component extraction based modified instantaneous symmetrical component theory is also suggested for load compensation (MISCT) in non-stiff system. Various DSTATCOM configurations are analyzed based on the filter capacitor combinations using MISCT and compared with conventional instantaneous symmetrical component theory (CISCT) for DSTATCOM applications, using hysteresis pulse width modulation (PWM). The performance analysis carried through an extensive MATLAB simulation shows excellent improvement in load compensation with significantly lower total harmonic distortion (THD) and reduced switching components in the terminal voltage for integrated DSTATCOM structure with series and shunt filter capacitor using MISCT.
An application of the set-point controller expressed in generalized velocity components for an airship is presented in this paper. The nonlinear controller was proposed originally for fully actuated underwater vehicle...
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ISBN:
(纸本)9781479959013
An application of the set-point controller expressed in generalized velocity components for an airship is presented in this paper. The nonlinear controller was proposed originally for fully actuated underwater vehicles. However, in this work it is shown that the same controller can be used for an airship, thanks the velocity transformation, and it is able to detect risk resulting from lost or reduction gain coefficients. Consequently, the shown approach appears an useful tool for investigation of the control algorithm in case of some flight disturbances of motion. It is worth of notice that the analysis gives further insight into the airship dynamics. The performance of the applied controller is tested by simulation on a 6-DOF model of the airship.
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