CSA has developed two families of suspension systems for simulating true free-free boundary conditions in dynamic testing of structures, and for producing a very high level of isolation from environmental disturbances in testing of sensitive structures and instruments. The Dash-Zero systems are all passive and well suited to common modal tests where the weight of the test article must be supported with very low stiffness, small added mass, and no friction over a vertical range of motion of a few inches. The Dash-Dx series adds sensors for vertical displacement, acceleration, and force plus a non-contact voice coil actuator with supporting electronics. The Dash-Dx family adds capabilities for remote monitoring, integrated disturbance injection with no added stiffness, mass cancellation, high-accuracy variable stiffness control, and other special capabilities for research and development.

Both families of suspension systems use a unique frictionless air spring and air bearings to produce vertical suspension frequencies below 0.2 Hz for payloads from less than 20 lbs to over 5000 lbs per suspension device. The unmatched performance of the devices has allowed customers to complete dynamic tests not otherwise possible. Both families are well proven over 15 years in a wide range of applications.

Systems are available for use in vacuum and in a wide range of sizes and options. For more information, e-mail suspension@csaengineering.com.

Dash-Zero / Pneumatic-Magnetic / Custom Systems / Technical Background