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An ideal steering characteristic is of great importance to improve the handling stability of four-wheel independent steering (4WIS) electric vehicle. For this reason, we proposed in this paper to use LQR optimal control theory to control variable gear ratio steering control through rear active steering. To realize great steering gain (i.e., quick response to handling) at low speeds and small steering...
This paper proposes a dynamic model of the growth firm facing takeover threats stochastically. The formal analysis here focuses on the defensive payout strategy of value-maximizing management under the circumstances of random stock market valuation errors, and the bidders' perceived synergistic gains. By borrowing the concept of "hazard rate" from reliability theory, The model sheds light...
This study focuses the empirical examination on the relationship between internal governance factors and cross-border related party (CBRP) transactions of Chinese firms. Using the data of the listed companies in China's Stock Exchanges during 2003-2007, we find that the size of CBRP transactions is positively associated with concentrated ownership, imbalance of power among large shareholders, CEO...
A typical servicing operation in space mainly includes three phases: capturing the target, re-orientating of the whole system with the target, and repairing the target. The attitude of a satellite usually changes after the capturing, because the control system is turned off during this phase for safety reasons. In this paper, a method is proposed to achieve re-orientating the space robot system, planning...
In this paper, two different distributed variable structure control methods for free-flying space robot are introduced. One is based on upper bound of disturbance, while the other is based on proportional switching. The dynamic model of the space robot, as well as the low speed friction model, is described in detail. Taking a two DOF free-flying space robot as the object, the arithmetics of the two...
The paper presents a new calibration method of the parallel robot using genetic algorithm (GA) which has the powerful global adaptive probabilistic search ability. In the process of the calibration, calculation of measurement residuals through inverse kinematics is adopted, which greatly reduces calculation burden and saves operation time. At last, in the form of simulation and experiment, considering...
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