For the low efficiency and poor surface quality problem of finishing ruled surface blade in the traditional method, tapered ball end mill cutter location optimization methods had been proposed to ensure that the envelope surface of tapered ball end mill is close to intractable ruled surface blade as much as possible. First, the tapered ball end mill initial cutter location was obtained based on the improved two point offset algorithm. Then to realize the cutter location optimization calculation, selected three point in tool axis to slide for the target of the minimum range between cutter envelope surface and blade surface. Finally, the blades instance was calculated according to the obtained tool center point and optimized tool axis vector. Simulation and experiments verified the effectiveness of cutter location optimization method proposed in this paper.

A control platform was constructed with the features of a car carrier and two step motors, which could be controlled by changing the motors’ speed and direction based on DSP. Two motors were directly connected with the front wheels (they are both the driving wheels and steering wheels) to realize a straight line or curve driving. The hardware circuit of the experimental platform control part was designed to solve the relative connection problems, including among the development board, step motor controller, step motor; among the computer, the emulator, the development board. The control strategy of the step motor was studied based on DSP. To verify the trajectory tracking control function of the experimental platform, a circular trajectory was verified with the tracking control strategy.

Integral impeller is the key component in aviation, aerospace and other fields, and the deformation has an important effect to the machining quality and precision of the integral impeller. Because of the complexity of the geometry and surface curvature changes for the integral impeller, and the semi suspended state during the processing, force analysis and control technology for the deformation have become the key and difficulty to realize high quality processing. In this paper, the situation about the blade machining with the finite element analysis is introduced, and the factors about the blade machining deformation is also summarized. The deformation of a single cutter location point are computed and analyzed with finite element method, and the application problems to the machining deformation with the finite element are presented.

To improve production quality and reduce machining time, machining parameters need to be monitored and adjusted automatically in milling. An integrated controller which is modular, configurable and based on OMAC, is established. The hardware platform, resultant cutting force constraint and its fuzzy control rules have been introduced in detail. In the fuzzy controller designed, two inputs and one output are used with five fuzzy sets for the controller, and the output rate of feed-rate can be changed from 50% to 200%. This controller has the abilities of reducing fluctuation range of cutting force, adjusting feed-rate intelligently, which is a part of CNC system. The experiment results show it can realize the real time status monitoring with this system, reduce the cutting force fluctuation, and adjust the feed-rate intelligently during machining.

To solve the problem of automobile rear end collision, an early warning system is designed, which is based on DSP chip control. Ultrasonic ranging is selected in the system. By providing pulse trigger signals, internal modules will send out eight periodic levels with forty kHz, and detect echoes at the same time. Once the echo signal is detected, the reverberation signal will be output. Then the reverberation signal can be changed into actual distance in real time by interrupt mode. The result stands for the distance between the car and the obstacles, then corresponding braking measures and early warning will be decided according to the minimum safety distance. When it is dangerous, the car status can be controlled according to the setting logic state.