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Liang Duan,Chuanxue Song,Shukai Yang,Shiqi Fan,Bingwu Lu 대한기계학회 2016 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.30 No.7
The taper leaf spring of tandem suspension of commercial vehicle is different from the traditional taper leaf spring. Thus, the professional software MSC.ADAMS/CHASSIS leaf spring, which is specially applied in traditional leaf spring, does not reliably develop the computational model of the taper leaf spring of tandem suspension. The multi-body dynamic model of the taper leaf spring of tandem suspension, which is developed in this paper, is a secondary development model that is based on the leaf spring model built by MSC.ADAMS/CHASSIS leaf spring. End contact and friction in the modified model are redefined to exhibit the hysteretic characteristics of the taper leaf spring of tandem suspension. The test of the taper leaf spring of tandem suspension is conducted to validate the reliability of the modified model. The tests in this paper are divided into two groups. The first group started at an unloaded state at an excitation frequency of 1/30 Hz and amplitude of 70 mm to acquire quasi-static behavior. The second group is conducted at various frequencies (2, 3 and 4 Hz) and various amplitudes (±1, ±3 and ±10 mm) in a loaded state to acquire dynamic behavior. A formula to calculate dynamic spring rate for leaf spring is proposed, and details about the formula are presented. The simulations are conducted under the same conditions as the test. The hysteretic characteristics and the relative error of dynamic spring rate from the test are compared with the ones from the simulations for the validation of the reliability of the modified model.
Stability Criterion of Linear Delayed Impulsive Differential Systems with Impulse TimeWindows
Huamin Wang,Shukai Duan,Chuandong Li,Lidan Wan,Tingwen Huang 제어·로봇·시스템학회 2016 International Journal of Control, Automation, and Vol.14 No.1
In this paper, we study the uniform stability of linear delayed differential equations with impulse timewindows. By means of Lyapunov functions and Razumikhin technique combined with classification discussiontechnique, the criterion of uniform stability is obtained, which may be used to discuss others stability of delayeddifferential equations with impulse time windows. Two examples are given to illustrate the effectiveness of thetheoretic result.
Stabilization of Oscillating Neural Networks with Time-Delay by Intermittent Control
Chao Liu,Chuandong Li,Shukai Duan 제어·로봇·시스템학회 2011 International Journal of Control, Automation, and Vol.9 No.6
In this paper, we study the exponential stabilization of oscillating neural networks with time-delay through the process called intermittent control. Some exponential stability criteria for the controlled neural networks are established by Lyapunov function and matrix inequality analysis technique. The present results allow us to estimate legitimately the feasible control region of control parameters. Nu-merical example is also given to show the effectiveness of our proposed results.