Moog Industrial Group delivered a test system for high-dynamic rotary shock absorber testing to Piedrafita, a Spanish company that delivers solutions for Vehicle Engineering and Land Platforms. This robust fatigue test system will be used in the development process of a new shock absorber designed for military ground vehicles that work under extreme conditions.

    Piedrafita needed a complex test system for the development phase and a robust fatigue testing system to ensure reliability. The company contacted Moog with the request to deliver a test system that could meet the high performance specifications of 100g acceleration peaks, 4.4m/s velocity, 80kN impacts and more than 300kW power transmission. The solution that Moog delivered consists of a hydraulic servo actuator featuring 90kN force at 280 bar. The high-dynamic and low-friction actuator contains a Moog D792 3-stage Servo Valve with 1000 l/min flow and internal vibration damped electronics. The solution also comprises a control cabinet with a Moog Portable Test Controller and software featuring special safety scripts. Using the system, Piedrafita has met the goals and planning of the qualification tests. The design verification and validation testing projects and the accelerated lifetime test program have now been concluded. Currently, a special working-condition test plan is being executed.