EMB-505 First Officer reported flight encountering severe turbulence during cruise. Flight crew advised ATC and descended to lower altitude and resumed flight.

Narrative

This Morning we were flying to ZZZ we experienced severe turbulence followed by us requesting priority handling due to multiple aircraft failures. The flight started off fairly smooth to light chop. We started picking up light to moderate chop climbing through Fl290 and it started to settle down passing FL400. We were level at FL410 with smooth to occasional light chop. As we started to approach the ZZZZZ way point we started to develop moderate chop. While in this moderate chop our airspeed increased rapidly. PF reduced throttle to combat airspeed increase. With in seconds the moderate chop-turbulence escalated to severe turbulence. Aircraft was forced upwards in altitude. As PF corrected; multiple failures displayed. Most notable failure was Yaw damp. Due to the multiple messages and the on going turbulence we requested priority handling to begin a decent down to known smooth air. As we descended through FL280 the Crew Alerting System (CAS) messages disappeared and our AHRS failure was fixed. Level at FL260 we were able to engage the proper AHRS to each side and resume normal operation of the aircraft. After making sure passengers were safe and company was notified we proceeded to our destination. No other abnormalities were noted after decision to proceed to ZZZ. Passengers seemed to not have been disturbed during the event upon landing they seemed happy and unconcerned. As if it was a normal non event.Suggestions: I don't have any suggestions at this time. Even with weather application running I'm not sure what else could have been done to avoid the unexpected turbulence.