Control of mobile equipment for the processing of marine shaft lines

The purpose of the research is to develop solutions for mobile equipment control in the processing of marine shaft lines; to solve the issues of geometric accuracy of processing; to create a corrective program to address the issues of accuracy of the geometric parameters processing; to give reasons for the application of linear electrohydraulic step drive (LEHSD) in mobile equipment control. The analysis of schemes and mathematical dependencies for calculating the trajectory of the tool movement of a mobile machine when processing shaft lines is carried out; the choice of the optimal zone for finishing the shaft line, taking into account the beats. The object of the study is a ship shaft line. The paper presents an original scheme of rotation of the shaft line section, as well as schemes for changing the position of the shaft line during processing; justifies the possibility of using a linear electrohydraulic step drive (LEHSD) with a corrective program for processing taking into account automatic measurements and a specified error.

The Road to Revolution

This chapter presents a biography of Patterson and looks at his road to revolution. By 1923, Patterson became a named partner in what became New York City's leading Negro law firm, Dyett, Hall, and Patterson. In 1926, he made official what some assumed was the case—he joined the Communist party—though an epochal event the following year led to his making this political decision, a career choice to become a professional revolutionary. He then left his law firm, instead devoting his life to the Communist party and its idea of a step-by-step drive to socialist revolution, paved all the way by one democratic advance after another—as demonstrated in the first major instance by the Scottsboro case. Soon he could be found at the subway entrance at 135th Street and Lenox Avenue, selling the CP newspaper. He also began participating in street-corner meetings and distribution of leaflets, and he attended classes at the party school.

The Application and the Driver Design of Double Axis Step-Drive Electromotor in the Motorcycle Meter

The traditional motorcycle meters are driven by the separate motors, these devices are simple and easy to be controlled, stable performance, but dial space has not been fully utilized. This paper introduces the double index show of motorcycle speed and speed，focus on analysis of dual-axis stepper motor driven connections, drive mode and the driver circuit design. The results of experiment and application shows that the coaxial two-pointer motorcycle display instrument has good repeatability, good linear scale, fast response, no jitter, high reliability and relatively small size and many other advantages, instrumentation stepper motor driver with dual-axis motor instrument design meet the relevant requirements of motorcycle meter, can be easily to achieve motor servo system driven synchronous control of double axis step-drive electromotor.

Design on Same Axis Double Index of Motorcycle Based on MCU

A new design method on showing motorcycle velocity and speed is introduced, which is controlled by P87LPC64 SCM and driven by VID66-08 CMOS chip. It consist of some module including SCM, sensor, velocity information unit, speed information unit, mileage information unit, mileage drive, double axis step-drive electromotor index show, LED show module. The system has some trait such as new exterior, low cost, hign precision, little error, direct show, micromation. Experiment result prove that the method is effective.