基于单向量S变换的旋转变压器软件解码方法

旋转变压器能够满足恶劣环境和复杂工况条件下的电机转轴角位移和角速度检测,但对其输出的模拟信号进行高精度和低成本解算是一个难题。以旋转变压器信号解码为研究对象,提出一种基于单向量S变换(Single Vector S Transform,SVST)的信号解码算法。首先求解旋转变压器两路输出信号的SVST,取模得到除噪的两路输出信号的包络模向量,然后利用最佳非零区间的象限判断规则确定信号所处象限,最后采用反正切修正算法求解精确的角位移和角速度。通过对仿真信号和实际信号的实验证明了所提方法的有效性和精确性。

A Method of Resolver Software Decoding Based on Single Vector S Transforms

The resolver can satisfy the needs of measurement of angular displacement and angular speed in harsh environment and complex conditions but resolving the output of the analog signal with high precision and low cost is still a problem.Researched on signal decoding of the resolver,a signal decoding algorithm based on single vector S transform (SVST) resolver is proposed.Firstly,the SVST of the two-path output signals are solved,and the enveloping modal vector of two-path resolving output signals with noise cancellation are obtained by taking the modulus.Then,the quadrant of signals is determined by the optimal nonzero interval of quadrantrules.Finally,the angular displacement and angular speed are solved accurately by arc tangent modified algorithm.The validity and accuracy of the proposed method are proved by experiments on the simulation signals and actual signals.