In order to obtain a lightweight and high-stiffness main supporting structure of space camera

a topologic optimization design method of space camera was presented. Based on the method

two kinds of main supporting structures of space camera with Cassegrain and TMA optical systems were optimized using Finite Element Method(FEM). Compared with before optimization

the first -order natural frequency of the main supporting structure of Cassegrain optical system raises from 41 Hz to 72 Hz with 15 percent weight lost

and the main supporting structure of TMA optical system loses 35 percent weight without changing the first-order natural frequency. The numerical results indicate that after adopting the topologic optimization design method

not only the design period is shortened

but also the supporting structure weight is effectively reduced and the capability of the main supporting structure is enhanced also

Which shows that optimized support structures can meet the system design requirements.