Abstract
The character of supersonic air-to-air missile is centered with capturing the target or evading the attack of target. Hence, active disturbance control method is proposed by means of using nose-mounted micro-structures what are called flow effectors. In general, flow effector actuator is buried inside the projectile. For satisfying the active disturbance control, the flow effector actuator pushes up from the cone nose of the projectile. For the reason of the air pressure and shape memory alloy wire actuation characteristic, it is necessary to calculate the input stiffness/output stiffness of the transmission mechanism of flow effector actuator.
This paper analyses the system dynamics using the matrix method for serial compliant mechanism. Based on the stiffness characteristics of the corner filleted compliant mechanism, the shape memory alloy wire-based actuator analysis model is built. Besides, the stiffness model and output capacity of the flow effector actuator system are given. The actuation properties of shape memory alloy wire-based flow effector actuator by systematic approach is described, which contains kinematic analysis, static analysis of the system, and using the shape memory alloy strain-stress relationship under high temperature. Several transmission mechanism experiments are performed and the results indicate that the stiffness calculation methods proposed agree well with the experimental results. Flow effector actuator actuation properties test platform is setup and the input displacement and external load is tested.