Forward collision occurs most frequently and involves the largest number of fatalities among various types of collisions in traffic accidents. Active research has been carried out to develop systems to avoid or mitigate forward collision. These systems are effective in reducing the number and the severity of occupant injuries, however, there is still margin for improvement, especially for reduc...

Abstract. In this paper, the minimum time feedrate trajectory planning problem for five-axis computer numerical control (CNC) machining is studied. A more accurate model for the feedrate trajectory planning problem is proposed by constraining the velocity, acceleration, and jerk for all five axes in the joint space and constraining the chord error in the workpiece coordinate system. For the new...

We analyze the Galactic bulge microlensing event MOA 2003-BLG-37. Although the Einstein timescale is relatively short, tE 1⁄4 43 days, the light curve displays deviations consistent with parallax effects due to the Earth’s accelerated motion. We show that the 2 surface has four distinct local minima that are induced by the ‘‘jerk-parallax’’ degeneracy, with pairs of solutions having projected E...

The objective of this paper is to devise a scheme for generating arm gestures of humanoid robots. Inverse kinematics and the minimum-jerk trajectory method are used to generate trajectory of each gesture. To calculate the desired positions of arms, inverse kinematics is solved by the damped least-squares method. Human-like trajectory from initial position to desired position is generated by the...

Aiming at reducing the vibration of CNC machine tools and increasing manufacturing quality, an interpolation method for parametric tool pathes with confined jounce, jerk, acceleration, and speed is proposed. An acceleration/deceleration profile with confined jounce, jerk, acceleration, and speed is proposed and it is proved that this profile is time-optimal to change the speed from one value to...

Model for efficiency optimization of electric elevator drive is presented in this paper. It combines two strategies for efficiency optimization: Loss model control and Search control. Search control technique is used in a steady state of drive and loss model during transient processes. As a result, power and energy losses are reduced, especially when load torque is significant less related to i...