Inertial exciter: usually composed of two rotating shafts and a pair of gears with a speed ratio of 1. The eccentric block on the rotating shaft generates a combined force of inertial force in the Y direction, so that the excited object obtains the required vibration.

Electric exciter: composed of a motion system, a magnetic circuit system and a supporting spring, it uses the action of the magnetic field force on the charged conductor in the magnetic field to generate movement, and acts on the object being tested through the shell of the exciter.
Electromagnetic exciter: directly uses electromagnetic force as the exciting force, often used in non-contact excitation occasions, inputs a periodically changing current through the electromagnet coil, and generates a periodically changing excitation force between the excited object and the electromagnet.
Electro-hydraulic exciter: controls the oil circuit through the electro-hydraulic servo valve, makes the piston reciprocate, and excites the excited object with the ejector rod, which is suitable for low-frequency vibration and high-thrust applications.