2results about How to "High performance output" patented technology

The application provides a function type hybrid control method of an electric special vehicle driving motor, which combines a fuzzy PID algorithm and a conventional PID control algorithm through a switching function to obtain the comprehensive advantages of the two control algorithms. Meanwhile, in order to reduce the calculation burden and execution time of the controller and facilitate engineering implementation, a fuzzy proportional algorithm with the transient performance of the fuzzy PID algorithm is adopted instead. According to the operating conditions of the special vehicle, the operating state of the motor is segmented for research, and a set of rules or a separate fuzzy algorithm is used to determine the weight of the outputs of the two control algorithms. However, an additional fuzzy calculation is required, which increases the calculation time and gain constant adjustment, reduces the switching frequency of the control system, causes higher torque fluctuation, and further designs a switching function to calculate the output weight control of the two algorithm outputs, which not only reduces the torque fluctuation caused by redundant calculation, but also ensures that the vehicle driving motor works in the optimal control state.

The invention relates to a rectangular coordinate-to-polar coordinate conversion method and device based on an LUT and CORDIC hybrid architecture. The method comprises the following steps: S1, sector folding preprocessing; s2, performing coarse rotation iteration; s3, generating a dynamic address; s4, a compression lookup table is queried; and S5, data compensation and reconstruction. According to the method, a small amount of CORDIC iteration is introduced to rotate the input vector to a very small angle range, so that the input space required to be covered by a subsequent lookup table is greatly compressed; meanwhile, the bit width and the address depth of a storage value in the LUT are remarkably reduced by combining module value residual storage and a dynamic truncation technology, so that the storage resources of the LUT are greatly reduced on the premise of ensuring the precision, and the hardware implementation cost is lower.