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The controller area network (CAN) is a field bus that has been widely used in distributed embedded systems due to its inexpensiveness, robustness, guarantee of latency times as well as error detection. However, electromagnetic interference from the operational environment and hardware malfunction may cause short disturbances and permanent failures respectively, inevitably bring on communication errors...
The objective of this research is to propose a new and practical LQG control method for the vehicle active suspension. The novelty lies in optimizing the LQG controller without road input signal for the active suspension to improve practicability of LQG control method. Taking a quarter-vehicle model as an example, the control parameters of LQG controller without road input signal for the active suspension...
Batch chemical processes have become significant in chemical manufacturing. Recently, economy globalization has resulted in growing worldwide competitions in traditional chemical process industry. In order to increase competition, reduce production costs and meet safety requirements, it is necessary to implement varies optimization methods and advanced control strategies. The goal of this paper is...
Active Disturbance Rejection Control (ADRC) method is used as auto speed regulator (ASR) to improve the dynamic performance of cascade control for winding motors in double closed loop control system. In order to optimize the numerous parameters of ADRC, an optimizing objective function is proposed, which is based on the error integral criteria and considered the static and dynamic characteristics...
In this paper, various cases of the radial harmonic Fourier moments(RHFMs) are investigated, and the RHFMs based on the exponent function are proposed. We proved that RHFMs based on trigonometric functions is equivalent to those based on exponent functions on mathematics, and the RHFMs based on exponent functions have simpler forms. An image-reconstruction experiment was performed with the RHFMs based...
Vibration signal, power of spindle motor and spindle speed signal are used in the vibration controlling system of CNC milling machine. The rule of time and frequency domain features of vibration signal is got. Using Root Mean Square, power spectral density of vibration signal and the power of spindle motor, the cutting parameters of CNC machine tool is regulated. The controlling signal can control...
Based on Newton dynamics mechanics theory make a study of two-wheeled self-balancing robot, a detailed mathematical model of the modeling process is provided, and then, using the reasonable method, a linear state-space equations is built up. After that, the LQR controller and state-feedback controller based on pole placement theory are both designed. After a number of simulation experiments, we get...
In view of existing situations of development of newspaper advertising, with the problems of relationship between newspaper advertising and economy and society as the background, the control approach of coordinated development for newspaper advertising with economy and society is discussed, using large scale system cybernetics method from the point of view of large scale system, and then its corresponding...
This paper presents a thorough analysis and necessary improvements of the method of ILAC (Instant Lead Attack Computing), an advanced airborne fire control method. First, on the basis of analysis of LAC (Lead Attack Computing Method), a classical airborne fire control method, the theoretical foundation of ILAC is studied. Second, the essence of ILAC is disclosed in terms of its advanced points compared...
Several key problems in the controller design for inverted pendulum system are discussed in-depth. Applying the theory of Lie algebra differential geometry based on the single linear inverted pendulum model established by Lagrange method, the problems of exact linearization, controllability, relative degree, the control based on approximate linear model and the stability control of nonlinear inverted...
In this paper, Serial Recovery (SR) scheme is proposed in PCE enabled wavelength routed optical network. In some scenarios recovery time is not strictly emphasized and SR can be deployed. SR can experience lower blocking than traditional Parallel Recovery (PR) and SR can introduce Quality of Service (Qos) into recovery process. Simulation is conducted with SR and PR. Our numerical results show that...
An Unmanned Surface Vehicle for bathymetry is introduced. Based on fluid dynamic of the USV, its three-degree of freedom motion model is constructed. The heading error is used for the motion model's feedback variable, and waypoint tracking is achieved by the Line-Of-Sight algorithm. In the adaptive isobath tracking, an oscillating motion of USV is defined firstly, which can be implemented by waypoint...
Environmental factors have effects on the growth of the plants in greenhouse, so it is significant to research the changes of environmental factors in greenhouse. The dynamic mathematical model about temperature and humidity of this situation is analyzed in this paper. The changes of temperature and humidity in greenhouse are not the simple linear process but the complicated nonlinear process. The...
Aiming at the problem of detection and location when faults of thruster and sensor for autonomous underwater vehicle occur simultaneously, a method of quantitative /qualitative hybrid diagnosis is proposed, combining neural networks technology with dynamic trend analysis technology. Firstly, a fault detection observer model is proposed to achieve the joint estimation of quantity of state and fault...
This paper deals with the problem of stabilization of stochastic perturbed chaotic delayed neural networks under delayed feedback control. A delay-dependent sufficient condition for the mean-square asymptotic stability of the controlled neural network is derived via a discretized Lyapunov-Krasovskii function method. The desired feedback controller is designed in terms of linear matrix inequalities,...
With the car type pulse combustion furnace in a steel plant as research object and the k-e two-equation turbulence model is adopted, this paper makes numerical simulation and research on the furnace temperature field, then obtains the distribution and offset angle of burners that could organize burning rationally and effectively. These provide a basis for ensuring the furnace temperature uniformity,...
In order to optimize pedestrian signal cycle, queuing theory and probability theory were used to build delay model of pedestrian-vehicle system, and then put forward the calculation method of conversion coefficient of pedestrian crowd and vehicles. The delays of pedestrian and vehicle were calculated by equilibrium phase delay formula. The critical volume curves of pedestrian signal for pedestrian...
A control algorithm ensuring the stability of system was proposed to solve the problem of interpolated compensation under low fresh rate. The result satisfied the demand of system stability other than the result of numeric interpolation. The compensation algorithm in main thread ran in the non-blocking mode by using an asynchronous callback function. As a result of improving stability, the transparency...
Diode clamped multi-level inverter (DCMLI) has wide application prospect in high-performance medium or high voltage adjustable speed drive systems. In this paper, a novel SVPWM (Space Vector Pulse Width Modulation) algorithm for DCMLI fed induction machine drive is proposed. This algorithm transforms the reference space vector into the non-orthogonal coordinate system. It overcomes the shortcoming...
This paper introduces the classification of adaptive PID control. It mainly describes the principle of adaptive control and the principles and applications of several common adaptive PID controllers. In addition, this paper has analysed the application of fuzzy adaptive PID control in the trajectory control and spray system control in the trellis spray robot.
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