| Delta-Sigma调制器在空间指向镜位置伺服系统中的应用 |
| |
| 引用本文： | 王淳,谢妮慧,林喆.Delta-Sigma调制器在空间指向镜位置伺服系统中的应用[J].航天返回与遥感,2014(5):54-60. |
| |
| 作者姓名： | 王淳 谢妮慧 林喆 |
| |
| 作者单位： | 北京空间机电研究所,北京,100094 |
| |
| 摘 要： | 在目前的空间指向镜位置伺服系统中，数字控制器输出脉宽调制（PWM）的量化误差会导致指向出现小幅角度振荡，使得指向的稳定性降低，进而导致光学遥感成像质量发生退化。针对航天器工程实现的特点，将 Delta-Sigma 调制器引入到数控软件中，在不改变硬件电路与系统参数的前提下，显著的降低了输出量化误差对伺服系统的影响。Matlab仿真结果表明，该方法可使指向镜的指向角度振荡幅值衰减至原来的1/5以下，有效地提高了指向镜的指向稳定性。
|
| 关 键 词： | 三角积分调制器 指向镜 伺服系统 量化 空间遥感 |
Application of Delta-Sigma Modulator in Space Pointer Mirror Position Servo System |
| |
| WANG Chun,XIE Nihui,LIN Zhe.Application of Delta-Sigma Modulator in Space Pointer Mirror Position Servo System[J].Spacecraft Recovery & Remote Sensing,2014(5):54-60. |
| |
| Authors: | WANG Chun XIE Nihui LIN Zhe |
| |
| Institution: | Zhe ( Beijing Institute of Space Mechanics ＆ Electricity, Beijing 100094, China ) |
| |
| Abstract: | The quantization error of DPWM causes slight angle oscillation and stability decrease in pointer mirror position servo system, which results in degradation of optical imaging quality in space remote sensor. On the premise of changing no circuit and system parameters, Delta-Sigma modulator is applied to the software of products in this paper, which significantly lessens the impact of DPWM quantization error on the servo system. A Matlab simulation of pointer mirror position servo system is presented, with the result of more than 5 times attenuation of the amplitude of the angle oscillation by using Delta-Sigma modulator. |
| |
| Keywords: | Delta-Sigma modulator pointer mirror servo system quantization space remote sensor |
| 本文献已被 维普 万方数据 等数据库收录！ |
