| Since the 1990 s, the new changes in the strategic thinking of modern warfare took place. For example, use "surgical precision strikes" and "decapitation" and other operational concepts that can reflect the modern weapons of war have become increasingly demanding precision strike capability. The trajectory correction projectiles hit along with high accuracy and low cost, so much favored countries. But the design and optimal control performance, low-cost trajectory correction in motor actuator is one of the development process need to focus on to overcome technical difficulties.Based on the technology development status and trajectory correction study abroad, presented a two-dimensional trajectory correction program and determine the basic working principle and the overall structure and layout. According to the situation corrected suffered actuator torque, determine the initial correction servo control scheme.In terms of structure amend the implementing agencies, due to the permanent magnet motor with high efficiency, good performance, high reliability, so this choice as a permanent magnet motor control motor amend the implementing agencies. First, the basic structural characteristics of permanent magnet motor are analyzed, to determine a basic structure. Secondly, in order to improve the control precision of the motor, based on electromagnetic theory, using the finite element method, the main factors affecting the permanent magnet motor torque ripple is analyzed and studied, obtained chute, slot width, and magnetic pole arc coefficient offset the impact of the law on the permanent magnet motor torque and the associated simulation analysis, and finally, according to the analysis produced an experimental prototype.For correct projectile high overload, high speed, small space, we proposed the armature circuit series resistance speed and chopper speed are two ways to achieve the motor torque and speed regulation. To further analyze the effect of these two programs on the regulation amendment actuator torque and speed, design and build the analog control bench, with force sensing devices and supporting peripheral drive control circuit, respectively, these two approaches related experiments, and by comparing these two experimental phenomena, and ultimately determine the optimal control method for chopping regulation. |
