The traditional truss structure adopts a fixed form, which is the main reason for the over-height of the vehicle telescope. In order to achieve larger vehicle-mobile telescopes and solve the over-height problem, the new truss mechanism based on robotics is proposed in this paper. Based on the new structure, the posture and dimension parameters need to be determined. Stiffness has great effects on accuracy and resonance of the telescope system, which is influenced by the posture and dimension parameters. So the stiffness performance index is used to optimize the posture. Meanwhile, in order to simulate the force of the telescope in different states, translation evaluation index (TEI) and rotation evaluation index (REI) are represented in this paper. Wavefront aberrations can be obtained by establishing the relationship between TEI, REI and Zernike polynomials. The optimized posture is verified to meet the error requirement through this method and the accuracy is obviously improved through comparison.

传统的桁架结构采用固定形式，这是车辆望远镜超高的主要原因。为了实现更大的车载望远镜并解决超高问题，提出了一种基于机器人的新型桁架机构。基于新结构，需要确定姿势和尺寸参数。刚度对望远镜系统的精度和共振有很大影响，这受姿态和尺寸参数的影响。因此，刚度性能指标用于优化姿势。同时，为了模拟望远镜在不同状态下的作用力，本文提出了平移评估指数（TEI）和旋转评估指数（REI）。通过建立TEI之间的关系可以获得波前像差，REI和Zernike多项式。通过该方法验证了优化的姿态可以满足误差要求，通过比较可以明显提高精度。