When a fast-steering mirror(FSM)system is designed,satisfying the performance requirements before fabrication and assembly is vital.This study proposes a structural parameter design approach for an FSM system based on...When a fast-steering mirror(FSM)system is designed,satisfying the performance requirements before fabrication and assembly is vital.This study proposes a structural parameter design approach for an FSM system based on the quantitative analysis of the required closed-loop bandwidth.First,the open-loop transfer function of the FSM system is derived.In accordance with the transfer function,the notch filter and proportional-integral(PI)feedback controller are designed as a closed-loop controller.The gains of the PI controller are determined by maximizing the closed-loop bandwidth while ensuring the robustness of the system.Then,the two unknown variables of rotational radius and stiffness in the open-loop transfer function are optimized,considering the bandwidth as a constraint condition.Finally,the structural parameters of the stage are determined on the basis of the optimized results of rotational radius and stiffness.Simulations are conducted to verify the theoretical analysis.A prototype of the FSM system is fabricated,and corresponding experimental tests are conducted.Experimental results indicate that the bandwidth of the proposed FSM system is 117.6 Hz,which satisfies the minimum bandwidth requirement of 100 Hz.展开更多
This study explored an infrared/laser dual-mode compound detection mode.To be specific,the infrared system and laser radar were combined in common path,and the target at a far distance can be recognized,tracked and lo...This study explored an infrared/laser dual-mode compound detection mode.To be specific,the infrared system and laser radar were combined in common path,and the target at a far distance can be recognized,tracked and located using infraredguided laser-detection mode.The combination of the two single-mode detection techniques,namely,infrared passive imaging and laser active detection,can complement their own advantages,thereby achieving the acquisition of multi-dimensional information of the target such as the azimuth angle,the pitch angle,the velocity,and the range.To enhance the laser’s coherent detection efficiency,a piezoelectric-driven double-sided fast-steering mirror was innovatively developed,which realized emission,receiving,and registration of laser with the use of two reflection sides of a mirror.This study proposed the system indexes and overall architecture in accordance with actual application requirements,and developed an infrared/laser compound detection prototype.The pointing range,the scanning velocity of the system,the infrared target detection,and recognition aswell as the range and velocity measurement performances of the linear frequencymodulation(LFM)continuous wave laser were examined in depth.Finally,an outdoor scaled experiment at a range of 40 m was designed.The experimental results proved that the designed system can meet the expectations in performance.展开更多
基金This work was supported by the Science Challenge Project(Grant No.JCKY2016212A5060105).
文摘When a fast-steering mirror(FSM)system is designed,satisfying the performance requirements before fabrication and assembly is vital.This study proposes a structural parameter design approach for an FSM system based on the quantitative analysis of the required closed-loop bandwidth.First,the open-loop transfer function of the FSM system is derived.In accordance with the transfer function,the notch filter and proportional-integral(PI)feedback controller are designed as a closed-loop controller.The gains of the PI controller are determined by maximizing the closed-loop bandwidth while ensuring the robustness of the system.Then,the two unknown variables of rotational radius and stiffness in the open-loop transfer function are optimized,considering the bandwidth as a constraint condition.Finally,the structural parameters of the stage are determined on the basis of the optimized results of rotational radius and stiffness.Simulations are conducted to verify the theoretical analysis.A prototype of the FSM system is fabricated,and corresponding experimental tests are conducted.Experimental results indicate that the bandwidth of the proposed FSM system is 117.6 Hz,which satisfies the minimum bandwidth requirement of 100 Hz.
基金National Natural Science Foundation of China 863 Program(2014AA7100012).
文摘This study explored an infrared/laser dual-mode compound detection mode.To be specific,the infrared system and laser radar were combined in common path,and the target at a far distance can be recognized,tracked and located using infraredguided laser-detection mode.The combination of the two single-mode detection techniques,namely,infrared passive imaging and laser active detection,can complement their own advantages,thereby achieving the acquisition of multi-dimensional information of the target such as the azimuth angle,the pitch angle,the velocity,and the range.To enhance the laser’s coherent detection efficiency,a piezoelectric-driven double-sided fast-steering mirror was innovatively developed,which realized emission,receiving,and registration of laser with the use of two reflection sides of a mirror.This study proposed the system indexes and overall architecture in accordance with actual application requirements,and developed an infrared/laser compound detection prototype.The pointing range,the scanning velocity of the system,the infrared target detection,and recognition aswell as the range and velocity measurement performances of the linear frequencymodulation(LFM)continuous wave laser were examined in depth.Finally,an outdoor scaled experiment at a range of 40 m was designed.The experimental results proved that the designed system can meet the expectations in performance.
