Papers by Keyword: Control Method

Paper TitlePage

Authors: Jian Yu, Rong Jun Cheng, Hong Xia Ge
Abstract: A modified car following model is put forward considering the headway distance of two successive vehicles in front. A control method to suppress traffic congestion is proposed for car following model. According to the control theory, the stability conditions are derived. The feedback signals, which act on our traffic system, consider two velocity difference effect. The control signals will play an effect only if the traffic state is in congestion. The corresponding numerical simulation results are agree well with our theoretical analysis.
Authors: Xiang Pei Meng, Rong Jun Cheng, Hong Xia Ge
Abstract: We propose a simple control method to suppress two-lane traffic congestion for full velocity difference (for short, FVD) car-following model. The influence of lane changing behaviors is also studied in the stability of two-lane traffic flow under the boundary condition, and the friction interference which is from the neighbor lane has been taken into account. We derive the stability conditions by the control method. The feedback signals, which include vehicular information from both lanes, acting on the two-lane traffic system have been extended to the FVD car-following model. Theoretically, lane changing behaviors can break the stability of two-lane traffic flow and aggravate traffic perturbation, but it is proven that the congested traffic in two-lane traffic flow could be suppressed by using this control method.
Authors: Heng Chen, Yan Bing Ni
Abstract: This paper deals with a control method research and trajectory planning of parallel mechanisms. Control system scheme which is based on PC and motion controller has high openness, high degree of modularization and support for non-linear mapping relationship between operating space and joint space of parallel mechanisms with high flexibility and low cost. PC and NI motion controller and LabVIEW constituted hardware core and software platform of control system, respectively. Hardware technology of control system contained hardware selection, control circuit design and interface technology; software technology of control system developed application programs layer, core control layer and drive functions layer to realize core control functions of finding home, single-step or continuous movement and micro adjustment, which was based on hardware principle. Trajectory has been planned for a typical high speed parallel robot.
Authors: Cheng Hui Yang
Abstract: All of the performances of the car, break performance is one of the most important. In the stage of automotive design, road tests usually are not available, only special brake tests are used to simulate the test. Using brake tester is a good measure to decide the vehicle braking performance. To carry out the brakes test and to explore inertia, it can better simulate the actual use of the brake mode and environmental conditions, a more realistic response to brake performance, not only brake to improve the level of R & D to enhance the braking technology, but also can improve brake testing technology to improve the design level test bench, the most critical is a good control analysis of the mathematical modeling of the brake product development, quality control, and vehicle braking performance are very important. Based on the data calculation and analysis, model, and the control algorithm, obtained reasonable control of the brake test bench mathematical modeling, and the method to do the appropriate improvements.
Authors: Jin Zhong Zhu, Hui Fang Ma, Yu Heng Su, Guang Song Yan, Rui Chao Xu
Abstract: An accurate and reliable control method of irregularity in yarn fineness is presented. It's based on the theory of the influence of cotton fiber length distribution on the evenness of yarn, and it improves the predictive model of irregularity in yarn fineness. Under the producing condition of controlling, we set a value or value range of predetermined term of or/and predictive model. And according to the given material and yarn parameter and predicted yarn fineness, it can be calculated that the parameter range of material fiber which is to be controlled. Finally, the yarn is span according to the practical production requirement, come up to the desired yarn irregularity, and the control of irregularity in yarn fineness is completed. The built predictive model is consistent with practical production. The control method on the basis of the model is precise and convenient. It's also avoiding such problems as either works and material wasting or poor quality of yarn which happened in controlling the irregularity of yarns by experience. The control of irregularity in yarn fineness becomes convenience and practical by using this method which is with much higher manipulability.
Authors: Jing Wen Wu, Lin Yong Shen, Ya Nan Zhang, Jin Wu Qian
Abstract: Robot-assisted rehabilitation training on a treadmill is a popular research direction in recent years. And it will replace the artificial rehabilitation training to become a major rehabilitation training method for patients with lower limb action impairments. However, in the existing rehabilitation system, treadmill run in the constant speed. It has to change the speed manually rather than adjust according to the patients’ active consciousness. In the paper, we proposed a treadmill speed adaption control method for Lower Limb Rehabilitation Robot. A pull pressure sensor is used to detect human’s movement trends. The data are calculated through non-linear gain and then sent to the speed controller in the treadmill according to the characteristics that the hip of human body is fixed on the robot in the walking direction of the sagittal plane. Based on this principle, we designed a force measurement structure and verified the control method by experiment. The result shows that the control method can satisfy adaptive control of the treadmill speed.
Authors: Zhi Wen Yang, Shu Yun Chen
Abstract: In the vigorously develop vocational education, institutions are established under the national government financial support facilities of the training base. These training bases are used for vocational schools to train the conveyor skilled personnel to provide a good platform, but in the construction of large-scale training base, in order to achieve comprehensive, effectiveness, long-term operation, we must have effective management mode. Can they really play a strong function of the training base, and continue providing companies with high overall quality of talent training base management worthy of study and discussion. Apparel training base, for example, through the use of SWTO analysis techniques, play an important role of apparel training base in the conventional teaching, and plays an important role in practice of apparel training base management problems in a reasonable innovative approach to a theoretical basis for the better development of the apparel training base.
Authors: Xiao Feng Cai, Hong Tao Zhang, Hong Rong, Cheng Bin Lio, Xiang Zhu, Zhi Zhong, Lei Zhang, Deng Wei Gong, Zheng Tang Ji, Wei Jiang Cai
Abstract: This paper, starting from the professional point of view of turbine governor and according to various data in the test, presents a preliminary analysis of results in combination of various tests competed after Xiaowan Power Station 700MW hydropower unit speed governor was put into island mode operation after the Chu Hui direct current line was off-stream (trial). Meanwhile, it describes the adjustment that the speed control system should make once the power system is in the island mode, including the conversion of the control mode, the switch of control parameter and optimization of control algorithm, focuses on analyzing the optimization of control strategy of the speed governor in the island mode, and discusses the active and speed adjustment method of the units and the associated performance indicators.
Authors: Lu Lu, Jing Gao
Abstract: Urban design control methods play a key role in the modern urban development. In this paper, three main elements of urban design--architectural form, color and space texture are studied to compare the control methods of three countries: the United States, Europe and Japan. At last, it proposes the improvements of the control methods for Chinese urban development.
Authors: Chuan Liang Shen, Xiao Wen An, Ye Han, Da Xue Wang
Abstract: The piezoelectric materials have the positive and inverse piezoelectric effects. The piezoelectric elements can be served as actuators and sensors. The piezoelectric elements are adopted to control the vibration of autobody thin-wall structure. The proportional control, proportional-derivative control and independent modal space control based on LQR (Linear Quadratic Regulator) are simulated by using finite element method. The piezoelectric patched autobody thin-wall structure is simplified to a square plate with peripheral clamped boundary. The finite element model is established. The central node displacement is monitored as a control variable in these control methods. Central patched plate and surrounding patched plate are analyzed under the three control methods. The effectiveness of vibration control is obtained. Compared with proportional control, the proportional-derivative control has advantage of oscillation suppression at the beginning vibration control and has more obvious vibration control effectiveness. Compared with the above two control methods, the independent modal space control based on LQR has a better stability and vibration suppression effectiveness.
Showing 1 to 10 of 35 Paper Titles