CAJ | 학술논문

利用混沌序列对三角波进行混沌扩频，进而实现混沌脉宽调制(pulse width modulation，PWM)，可以达到降低正弦脉宽调制波(sinusoidal pulse width modulation，SPWM)谐波峰值、减少机械谐振等目的。针对传统SPWM波混沌调制在实现时混沌序列很快进入周期以及运算量大的问题，该文提出一种由传统 Logistic 混沌映射和 Tent 混沌映射相结合的改进的互变参数双混沌序列映射，并给出对应的SPWM 波生成方法。与传统混沌序列生成方法相比，该方法具有较低的运算资源消耗，较快的运算速度和较好的混沌性，且混沌序列周期明显增加。接着给出基于现场可编辑逻辑门阵列(field-programmable gate array，FPGA)的硬件实现方法，并将该方法生成的SPWM波与其他调制方法生成的SPWM 波进行对比分析。结果表明，该算法实现简单，占用资源少，并可明显降低谐波峰值。
이용혼돈서렬대삼각파진행혼돈확빈，진이실현혼돈맥관조제(pulse width modulation，PWM)，가이체도강저정현맥관조제파(sinusoidal pulse width modulation，SPWM)해파봉치、감소궤계해진등목적。침대전통SPWM파혼돈조제재실현시혼돈서렬흔쾌진입주기이급운산량대적문제，해문제출일충유전통 Logistic 혼돈영사화 Tent 혼돈영사상결합적개진적호변삼수쌍혼돈서렬영사，병급출대응적SPWM 파생성방법。여전통혼돈서렬생성방법상비，해방법구유교저적운산자원소모，교쾌적운산속도화교호적혼돈성，차혼돈서렬주기명현증가。접착급출기우현장가편집라집문진렬(field-programmable gate array，FPGA)적경건실현방법，병장해방법생성적SPWM파여기타조제방법생성적SPWM 파진행대비분석。결과표명，해산법실현간단，점용자원소，병가명현강저해파봉치。
Chaotic sequence is used for triangle wave spectrum chaotic spreading. Chaos triangle wave can be used for pulse width modulation (PWM) modulation, and then the reduction of harmonic content peak in sinusoidal pulse width modulation (SPWM) wave and the mechanical resonance, etc. can be realized. Due to periodic question and large computational complexity question of the traditional chaotic sequence mapping, this paper proposed a new double-chaotic sequence with mutual changing parameters mapping, and the corresponding method to generate SPWM wave was presented. This method was improved from traditional chaotic mapping equation Logistic chaotic mapping and combining Tent chaotic mapping. Compared with the traditional method for generating chaotic sequence, this method has a faster speed, better chaotic characteristics, costs fewer sources and can prolong the period efficiently. The chaotic mapping and SPWM modulation method based on field-programmable gate array (FPGA) is given and compared with other modulation method. The results show that the modulation method proposed in this paper can be finished easily and can reduce the harmonics peak effectively.